Clinical utility of noninvasive prenatal screening for expanded chromosome disease syndromes

PurposeTo assess the clinical performance of an expanded noninvasive prenatal screening (NIPS) test (“NIPS-Plus”) for detection of both aneuploidy and genome-wide microdeletion/microduplication syndromes (MMS).MethodsA total of 94,085 women with a singleton pregnancy were prospectively enrolled in the study. The cell-free plasma DNA was directly sequenced without intermediate amplification and fetal abnormalities identified using an improved copy-number variation (CNV) calling algorithm.ResultsA total of 1128 pregnancies (1.2%) were scored positive for clinically significant fetal chromosome abnormalities. This comprised 965 aneuploidies (1.026%) and 163 (0.174%) MMS. From follow-up tests, the positive predictive values (PPVs) for T21, T18, T13, rare trisomies, and sex chromosome aneuploidies were calculated as 95%, 82%, 46%, 29%, and 47%, respectively. For known MMS (n = 32), PPVs were 93% (DiGeorge), 68% (22q11.22 microduplication), 75% (Prader–Willi/Angleman), and 50% (Cri du Chat). For the remaining genome-wide MMS (n = 88), combined PPVs were 32% (CNVs ≥10 Mb) and 19% (CNVs <10 Mb).ConclusionNIPS-Plus yielded high PPVs for common aneuploidies and DiGeorge syndrome, and moderate PPVs for other MMS. Our results present compelling evidence that NIPS-Plus can be used as a first-tier pregnancy screening method to improve detection rates of clinically significant fetal chromosome abnormalities.     

Effect of diabetes on endometrial cancer recurrence and survival

ObjectiveThe purpose of this study was to investigate the influence of diabetes mellitus (DM) on cancer stage at diagnosis, cancer recurrence, and survival of endometrial cancer (EC) patients and the influence of the treatment of EC on glycaemic control, treatment, and complications of DM.MethodsIn this retrospective cohort study all 1644 patients with EC newly diagnosed in 2000–2008 and recorded in the population-based Eindhoven Cancer Registry (ECR) were included. In addition, from this total cohort a subcohort was selected for additional data collection and analyses, including 193 EC patients with DM and an age-matched sample of 195 EC patients without DM. Patients with FIGO stage IV as well as non-endometrioid histology were excluded.ResultsIn the total cohort EC patients with DM had a significantly higher age (69 years vs. 64 years), higher FIGO stages and more additional comorbidities compared to EC patients without DM. The 5-year overall survival rate for EC patients with DM was significantly lower than for EC patients without DM (68% vs. 84%). After adjusting for age, stage, period of diagnosis, cardiovascular disease, and treatment, this significant effect of DM on overall mortality persisted (HR 1.4, 95% CI: 1.0–1.8). Subcohort analyses showed that EC patients with DM were diagnosed more often with a higher body mass index (BMI) (34 kg/m² vs. 30 kg/m²) and EC was not significantly associated with changes in DM characteristics over time. Although the 5-year overall survival rate for EC patients with DM was significantly lower in the subcohort, for EC-specific mortality (n = 388) no statistically significant effect of DM was observed after adjustment for FIGO stage (HR = 1.7, 95% CI: 0.7–3.9).ConclusionsEC patients with DM compared to those without had worse patient characteristics, a higher FIGO stage, similar recurrence rates and worse overall survival.     

Impact of the Positive Pressure Valve on Vascular Access Device Occlusions and Bloodstream Infections

Background/PurposeThe use of needleless positive pressure connector valves (PPVs) on venous access devices (VADs) has been shown to have possible benefits in decreasing VAD occlusion rates. Catheter-related bloodstream infection (CRBSI) rates, however, have been variable. With this potential for improving patient outcomes, decreasing costs, and facilitating nursing care and catheter management, the use of PPV devices becomes both advantageous and desirable.MethodologyThis was a randomized, prospective, parallel clinical study of 160 medical and surgical step-down unit patients requiring parenteral therapies. Patients were equally randomized to two study groups to assess the impact on occlusion and CRBSI rates, using a PPV versus a standard cap without PPV. VADs included both peripherally inserted catheters (PICCs) and midlines.ResultsSeven VAD occlusions occurred; six in the experimental group, one in the control group (p = 0.43). Also, two CRBSIs occurred in the experimental group, with none in the control group (p = 0.497). All incidents occurred in doublelumen PICCs. The lack of statistical difference between the two groups for occlusions and CRBSIs indicates that the use of PPVs had no impact in preventing such outcomes. However, it was observed that the number of double-lumen PICCs and their dwelling time in the experimental group was significantly higher (p = 0.003).ConclusionThere was no difference in the rate of catheter occlusions or CRBSIs when using PPVs or standard caps. We consider that the study outcomes may be due to the study's small sample size, and we speculate that longer dwell time of double lumen catheters may have contributed to these outcomes. These observations deserve further investigation. However, the use of PPVs may still be advantageous from a nursing process perspective.     

Baseline diabetic knowledge after 5-day teaching program is an independent predictor of subclinical macroangiopathy in patients with type 1 diabetes (Poznan Prospective Study)

PurposeThe cardiovascular diseases (CVD) are the leading cause of mortality in type 1 diabetes (DM1). Carotid intima-media thickness (IMT) has been approved as a marker of subclinical atherosclerosis. The aim of this prospective study was to evaluate the relationship between baseline diabetic knowledge after five-day teaching program and IMT in patients with (DM1) treated with intensive functional insulin therapy (IFIT) from the onset of the disease.Material/methodsThe analysis included 79 subjects aged 23.4 ± 5.1 years with newly diagnosed DM1, participating in Poznan Prospective Study (PoProStu). The patients attended a five-day structured training program in IFIT at diagnosis, followed by a test consisting of 20 questions. After follow-up period of 11 years we evaluated the presence of microangiopathy and subclinical macroangiopathy. IMT of the right common carotid artery was determined using high resolution ultrasonography and calculated automatically with the Carotid Analyzer for Research program.ResultsAfter 11-year follow-up median intima-media thickness was 560 (IQR: 520–630) μm. We found a negative correlation between diabetes knowledge at baseline and IMT at the end of follow-up (r = −0.27, p = 0.017). In multivariate linear regression model baseline diabetic knowledge test result was associated with IMT at follow-up, independently from sex, age, smoking status, presence of hypertension and diabetic kidney disease (all at follow-up) and from mean follow-up LDL-cholesterol concentrations and HbA_1c results (β = −8, 95% CI −16, −1, p = 0.037).ConclusionsBaseline diabetic knowledge after 5-day teaching program is an independent predictor of subclinical macroangiopathy in patients with DM1.     

Polymyositis/dermatomyositis and nasopharyngeal carcinoma: The Epstein–Barr virus connection?

BackgroundPolymyositis (PM) and dermatomyositis (DM) are associated with high risk of nasopharyngeal carcinoma (NPC) in Asian countries. Epstein–Barr virus (EBV) might induce autoimmunity and malignancies in susceptible individuals.ObjectivesTo investigate the association of EBV with PM/DM and NPC in PM/DM patients.Study designSerum levels of anti-EBV viral capsid antigens (VCA) and anti-EBV-coded nuclear antigens-1 (EBNA-1) antibodies were measured by ELISA, and EBV DNA loads were determined using real-time PCR for 98 PM/DM patients, 94 systemic lupus erythematosus (SLE) patients and 370 healthy controls (HC). Anti-transfer-RNA synthetase antibodies (ASA) were determined by radioimmunoprecipitation for PM/DM patients.ResultsThirteen (13.3%) of PM/DM patients vs. none of SLE patients had detectable NPC. ASA were detectable in 31.7% of PM/DM without malignancy, while lack of ASA in any PM/DM patient with NPC. IgA anti-EBNA-1 were detectable in 30.6% of PM/DM patients and 31.9% of SLE patients, but only in 4.1% of HC (odds ratio [OR] 10.44 and 11.12 respectively, both p < 0.001). Significantly higher positivity for IgA anti-EBNA-1 were observed in PM/DM with NPC than in those without malignancy (OR 44.7, p < 0.01). Significantly higher positivity for EBV genome were observed in PM/DM with NPC than in those without malignancy (OR 43.9, p < 0.01), in SLE patients (OR 13.2, p < 0.05) and in HC (OR 99.4, p < 0.001). EBV DNA loads were significantly higher in PM/DM with NPC compared with those without malignancy and HC.ConclusionsOur results showed a positive association of EBV with PM/DM and NPC. PM/DM patients who have IgA anti-EBNA-1 or increased EBV DNA loads should be highly suspected to have occult NPC.     

Evolving classification of intensive care patients from event data

ObjectiveThis work aims at predicting the patient discharge outcome on each hospitalization day by introducing a new paradigm—evolving classification of event data streams. Most classification algorithms implicitly assume the values of all predictive features to be available at the time of making the prediction. This assumption does not necessarily hold in the evolving classification setting (such as intensive care patient monitoring), where we may be interested in classifying the monitored entities as early as possible, based on the attributes initially available to the classifier, and then keep refining our classification model at each time step (e.g., on daily basis) with the arrival of additional attributes.Materials and methodsAn oblivious read-once decision-tree algorithm, called information network (IN), is extended to deal with evolving classification. The new algorithm, named incremental information network (IIN), restricts the order of selected features by the temporal order of feature arrival. The IIN algorithm is compared to six other evolving classification approaches on an 8-year dataset of adult patients admitted to two Intensive Care Units (ICUs) in the United Kingdom.ResultsRetrospective study of 3452 episodes of adult patients (≥ 16 years of age) admitted to the ICUs of Guy’s and St. Thomas’ hospitals in London between 2002 and 2009. Random partition (66:34) into a development (training) set n = 2287 and validation set n = 1165. Episode-related time steps: Day 0—time of ICU admission, Day x—end of the x-th day at ICU. The most accurate decision-tree models, based on the area under curve (AUC): Day 0: IN (AUC = 0.652), Day 1: IIN (AUC = 0.660), Day 2: J48 decision-tree algorithm (AUC = 0.678), Days 3–7: regenerative IN (AUC = 0.717–0.772). Logistic regression AUC: 0.582 (Day 0)—0.827 (Day 7).ConclusionsOur experimental results have not identified a single optimal approach for evolving classification of ICU episodes. On Days 0 and 1, the IIN algorithm has produced the simplest and the most accurate models, which incorporate the temporal order of feature arrival. However, starting with Day 2, regenerative approaches have reached better performance in terms of predictive accuracy.     

Long-term follow-up for incident cirrhosis among pediatric cancer survivors with hepatitis C virus infection

BackgroundPediatric cancer patients who received blood transfusions were potentially exposed to hepatitis C virus (HCV) prior to second-generation HCV screening of blood products in 1992. Limited evidence is available about long-term incident cirrhosis in this population.ObjectivesWe aimed to estimate the overall and sex-specific incidence of cirrhosis among HCV-seropositive survivors of pediatric cancer.Study designWe identified 113HCV-seropositive pediatric cancer patients treated at St. Jude Children’s Research Hospital between 1962 and 1997, who survived ≥5 years post-diagnosis, and were followed through 2014. Our outcome was cirrhosis determined by liver biopsy or diagnostic imaging. We used a competing-risk framework to estimate the overall and sex-specific cumulative incidence and 95% confidence limits (CL) of cirrhosis at 10-year follow-up intervals.ResultsThe median duration of follow-up was 30 years (interquartile range = 28–36) post-cancer diagnosis. Cumulative incidence of cirrhosis increased at each 10-year interval from 0% after 10 years to 13% after 40 years (P_trend < 0.001). The median age at diagnosis of cirrhosis was 30 years (interquartile range = 24–38). We observed a linear trend in incidence for males (P_trend < 0.001), with a cumulative incidence of 18% (95% CL: 6.1%, 34%) after 40 years. The cumulative incidence for females was 6.5% (95% CL: 0.42%, 26%) after 40 years, but we did not observe a linear trend (P_trend = 0.99).ConclusionOur results suggest that the incidence of cirrhosis is similar between HCV-seropositive pediatric cancer survivors and the general population given similar duration of follow-up, but survivors may be diagnosed with cirrhosis at an earlier age.     

Periprosthetic bone mineral density changes after unicondylar knee arthroplasty

BackgroundUnicompartmental knee arthroplasty (UKA) has received renewed interest in the last decade. UKA involves minor injury to soft tissues, limited removal of bone and delicate preservation of knee anatomy and geometry. In theory, UKA provides an opportunity to restore post-surgical knee kinematics to near normal.HypothesisUKA leaves patellofemoral joint free to meet high mechanical forces with no stress-shielding and therefore might preserve bone mineral density (BMD).Patients and methodsWe studied 21 patients with osteoarthritis(OA), who had received medial compartment UKA at Kuopio University Hospital between October 1997 and September 2000. BMD was measured by dual-energy X-ray absorptiometry (DEXA), at baseline (within a week after surgery) and at intervals until 7 years.ResultsDEXA results were reproducible. The highest rate of periprosthetic bone loss occurred during the first 3 months after UKA. The average loss in BMD was 4.4% (p = 0.039) in the femoral diaphysis and it ranged from 11.2% (p < 0.001) to 11.9% (p = 0.002) in the distal femoral metaphysis; however, BMD changes in these regions, from 2 years to 7 years, were nonsignificant. At the 1-year follow-up, the BMD of the medial tibial metaphysis had increased by 8.9% (p = 0.02), whereas those in the lateral tibial metaphysial (–2.4%) and diaphysial regions (–2.0%) did not change significantly.InterpretationsUKA did not preserve periprosthetic BMD in the distal femoral metaphysis, whereas BMD changes in the tibial metaphysis were minor, consistent with a mechanical balance between the medial and lateral tibial compartments.Level of Evidence 2bProspective case control study.     

Mobile bearing or fixed bearing? A meta-analysis of outcomes comparing mobile bearing and fixed bearing bilateral total knee replacements

BackgroundTo compare outcomes between mobile-bearing (MB) and fixed-bearing (FB) in bilateral total knee replacements.MethodsThe MEDLINE, EMBASE and Cochrane Library databases were searched. Randomized controlled trials of bilateral total knee arthroplasty with one of each design implanted were identified. Weighted mean differences (WMDs) and pooled risk ratios (RRs) were calculated using fixed- or random-effects models.ResultsTwelve studies were identified with a total of 807 patients and 1614 knees. All RCTs were of high quality with a low risk of bias. No statistical difference was found between MB and FB at 2- to 5-year follow-up in terms of America Knee Society score (WMD: − 1.29, 95% CI: − 5.65 to 3.06), pain score (WMD: − 3.26, 95% CI: − 10.45 to 3.93), range of motion (WMD: − 4.16, 95% CI: − 9.97 to 1.66), reoperation (RR: 1.00, 95% CI: 0.28 to 3.60), and radiolucent lines (RR: 1.51, 95% CI: 0.70 to 3.24). The results were similar at 1-, 5- to 8-, or > 8-year follow-up. Patient's satisfaction (RR: 0.85, 95% CI: 0.54 to 1.34), and complication (≤ 2-year, RR: 0.55, 95% CI: 0.29 to 1.04; > 2-year, RR: 1.0, 95% CI = 0.73 to 1.38) also showed no difference between two groups.ConclusionsBased on this meta-analysis we are unable to detect the superiority of MB as compared to FB. More randomized trials with a larger sample size and longer follow-up are needed to evaluate these two kinds of prosthesis.Level of evidenceTherapeutic Level II.     

The Ghana vasectomy initiative: Facilitating client–provider communication on no-scalpel vasectomy

ObjectiveIn 2003–2004 and 2007–2008, an initiative was implemented to improve client and provider knowledge and acceptance of no-scalpel vasectomy (NSV) in Ghana.MethodsAt eight facilities, physicians were trained in NSV and staff received training in the provision of “male-friendly” services. Health promotion activities provided NSV information to prospective clients. Client–provider communication was assessed via a mystery client study (n = 6). Knowledge and acceptance of NSV among potential clients were assessed with baseline and follow-up surveys (each n = 200) in 2003–2004 and three follow-up panel surveys in 2008 (each n = 240).ResultsTrained health staff exhibited improved attitudes and knowledge regarding NSV. Mystery clients reported receiving accurate, nonjudgmental NSV counseling. Awareness of NSV among panel respondents doubled from 31% to 59% in 2003–2004 and remained high (44%) in 2008. The proportion of men who would consider NSV increased from 10% to 19% in 2007–2008. NSV procedures increased three-fold from 2003 (n = 26) to 2004 (n = 83) and 2007 (n = 18) to 2008 (n = 53).ConclusionProvider training in client-centered services, coupled with targeted health promotion, improved client and provider knowledge and acceptance of NSV in an African context.Practice implicationsComplementary, sustained provider training and health promotion are needed to maintain NSV service quality and acceptance.     

Use of rapid influenza diagnostic tests under field conditions as a screening tool during an outbreak of the 2009 novel influenza virus: Practical considerations

BackgroundRapid influenza diagnostic tests (RIDTs) are used in various settings as a first-line screen of patient specimens. During the initial outbreak of the 2009 novel influenza A/H1N1 virus, the Nebraska Public Health Laboratory (NPHL) adopted a testing algorithm, attempting to maximize the usefulness of RIDTs. However, it became apparent that a high percentage of the positive specimens received from off-site facilities were negative for influenza viruses by the confirmatory test, the Luminex xTAG Respiratory Viral Panel (RVP) molecular assay.ObjectivesTo explore the cause of discrepancies between RIDTs results obtained from on-site facility testing versus confirmatory testing performed at NPHL.Study designSpecimens (n = 336) tested with RIDTs at off-site facilities and screened for high-probability of containing H1N1 were sent to the NPHL for confirmatory testing by RVP.ResultsOf 336 specimens analyzed, 104 were negative for influenza A or B by both RIDT and RVP; 127 were positive by both tests; 102 were positive by RIDT only; and 3 were positive by RVP only. Using the RVP assay as the gold standard, overall RIDT characteristics in this screened population were: sensitivity = 97.7% (95%CI: 92.5, 99.3); specificity = 48.1% (95%CI: 40.4, 55.8); positive predictive value = 54.3% (95%CI: 47.0, 61.4); and negative predicative value = 97.1% (95%CI: 90.6, 99.1).ConclusionsThe results show that the confirmation of RIDT-positive results varied widely by testing site. Possible explanations for the discrepancies in performance characteristics include testing a narrowly defined sample population, test facility characteristics, facility work load, and seasonal timing.     

CMV plasma DNAemia and risk of cancer among HIV-infected patients: A case–control study nested in the ANRS CO3 Aquitaine Cohort,France, 2002–2007

BackgroundCMV reactivation, which enhances immune senescence, could be associated with a higher risk of cancer.ObjectivesWe compared the prevalence of positive CMV DNAemia in HIV-infected patients with and without cancer.Study designThis case–control study, nested in the ANRS-CO3 Aquitaine Cohort, included patients with a first diagnosis of cancer (2002–2007) as cases. Two controls were matched per case.Cancer risk was estimated using conditional logistic regression models, an Odds Ratio (OR) of 2 could be detected with 80% power. The variables considered were: ≥1 positive CMV DNAemia, CD4+ and CD8+ counts, HIV plasma load. Plasma CMV DNA was retrospectively quantified within the 3-year period preceding the endpoint.ResultsThe 143 cases (93 non-AIDS-related and 50 AIDS-related cancers) and 284 controls had a median age of 47 years (IQR: 41–56). At the time of diagnosis or censorship, for cases and controls, median values were respectively, for CD4+ count: 327 cells/mm³ (IQR: 164–514) and 416 (IQR: 275–582), and for HIV plasma load: 2.6 log₁₀ copies/mL (IQR: 1.7–4.7) and 1.7 log₁₀ copies/mL (IQR: 1.7–3.3). We performed 2056 CMV PCR; 14 cases (9.8% [95% CI: 4.9–14.7]) and 19 controls (6.7% [CI: 3.8–9.6]) presented ≥1 positive PCR. CMV DNAemia was not associated with the risk of cancer (unadjusted and adjusted p-values = 0.19 and 0.54, respectively). HIV load >500 copies/mL was independently associated with a higher risk of cancer (OR = 2.02; p = 0.002; 95% CI: 1.29–3.17).ConclusionThis large case–control study did not show any differential exposure to positive CMV plasma DNAemia between cancer cases and controls.     

PDF text classification to leverage information extraction from publication reports

ObjectivesData extraction from original study reports is a time-consuming, error-prone process in systematic review development. Information extraction (IE) systems have the potential to assist humans in the extraction task, however majority of IE systems were not designed to work on Portable Document Format (PDF) document, an important and common extraction source for systematic review. In a PDF document, narrative content is often mixed with publication metadata or semi-structured text, which add challenges to the underlining natural language processing algorithm. Our goal is to categorize PDF texts for strategic use by IE systems.MethodsWe used an open-source tool to extract raw texts from a PDF document and developed a text classification algorithm that follows a multi-pass sieve framework to automatically classify PDF text snippets (for brevity, texts) into TITLE, ABSTRACT, BODYTEXT, SEMISTRUCTURE, and METADATA categories. To validate the algorithm, we developed a gold standard of PDF reports that were included in the development of previous systematic reviews by the Cochrane Collaboration. In a two-step procedure, we evaluated (1) classification performance, and compared it with machine learning classifier, and (2) the effects of the algorithm on an IE system that extracts clinical outcome mentions.ResultsThe multi-pass sieve algorithm achieved an accuracy of 92.6%, which was 9.7% (p < 0.001) higher than the best performing machine learning classifier that used a logistic regression algorithm. F-measure improvements were observed in the classification of TITLE (+15.6%), ABSTRACT (+54.2%), BODYTEXT (+3.7%), SEMISTRUCTURE (+34%), and MEDADATA (+14.2%). In addition, use of the algorithm to filter semi-structured texts and publication metadata improved performance of the outcome extraction system (F-measure +4.1%, p = 0.002). It also reduced of number of sentences to be processed by 44.9% (p < 0.001), which corresponds to a processing time reduction of 50% (p = 0.005).ConclusionsThe rule-based multi-pass sieve framework can be used effectively in categorizing texts extracted from PDF documents. Text classification is an important prerequisite step to leverage information extraction from PDF documents.     

The positive financial impact of using an Intensive Care Information System in a tertiary Intensive Care Unit

IntroductionIn the French healthcare system, the intensive care budget allocated is directly dependent on the activity level of the center. To evaluate this activity level, it is necessary to code the medical diagnoses and procedures performed on Intensive Care Unit (ICU) patients. The aim of this study was to evaluate the effects of using an Intensive Care Information System (ICIS) on the incidence of coding errors and its impact on the ICU budget allocated.Patients and methodsSince 2005, the documentation on and monitoring of every patient admitted to our ICU has been carried out using an ICIS. However, the coding process was performed manually until 2008. This study focused on two periods: the period of manual coding (year 2007) and the period of computerized coding (year 2008) which covered a total of 1403 ICU patients. The time spent on the coding process, the rate of coding errors (defined as patients missed/not coded or wrongly identified as undergoing major procedure/s) and the financial impact were evaluated for these two periods.ResultsWith computerized coding, the time per admission decreased significantly (from 6.8 ± 2.8 min in 2007 to 3.6 ± 1.9 min in 2008, p < 0.001). Similarly, a reduction in coding errors was observed (7.9% vs. 2.2%, p < 0.001). This decrease in coding errors resulted in a reduced difference between the potential and real ICU financial supplements obtained in the respective years (€194,139 loss in 2007 vs. a €1628 loss in 2008).ConclusionUsing specific computer programs improves the intensive process of manual coding by shortening the time required as well as reducing errors, which in turn positively impacts the ICU budget allocation.     

Nerve-sparing radical hysterectomy versus conventional radical hysterectomy in early-stage cervical cancer. A systematic review and meta-analysis of survival and quality of life

Background and aimsSurvival after radical hysterectomy (RH) for early-stage cervical cancer is good. Hence quality of life (QOL) after treatment is an important issue. Nerve-sparing radical hysterectomy (NSRH) improves QOL by selectively sparing innervation of bladder, bowel and vagina, reducing therapy-induced morbidity. However, the oncological outcome and the functional outcome after NSRH are subjects of debate. We aim to present the best possible evidence available regarding both QOL and survival after NSRH in early-stage cervical cancer.MethodsSystematic review and meta-analysis on studies comparing NSRH and RH.ResultsForty-one studies were included, and 27 were used for the meta-analysis. There was no difference in 2-, 3- and 5-year overall survival: the risk ratios (RRs) were respectively 1.02 (95% CI 0.99–1.05, n = 879), 1.01 (95% CI 0.95–1.08, n = 1324) and 1.03 (95% CI 0.99–1.08, n = 638). No difference was found in 2-, 3- and 5-year disease-free survival: RR 1.01 (95% CI 0.95–1.05, n = 1175), 0.99 (95% CI 0.94–1.03, n = 1130) and 1.00 (95% CI 0.95–1.06, n = 933) respectively. Post-operative time to micturition was significantly shorter in the NSRH group: standardized mean difference (SMD) −0.84 (CI 95% −1.07 to −0.60).ConclusionsNSRH can be considered safe and effective for early-stage cervical cancer since short- and long-term survival do not differ from those of conventional RH, while bladder function after NSRH is significantly less impaired.     

Efficient assessment of depressive symptoms and their prognostic value in myocardial infarction patients

BackgroundIdentification of post-myocardial infarction (MI) depressive symptoms is a major concern and clinicians are in need of a short, easy-to-use assessment tool for this population. We evaluated the utility and prognostic power of a brief 10-item version of the Beck Depression Inventory (BDI10) in post-MI patients.MethodsPatients (n = 416) were assessed on demographic/clinical variables and completed the BDI10, BDI-21 and STAI (anxiety symptoms) two months post-MI. The end point was a composite of cardiac death and recurrent MI. The average follow-up period was 2.7 years and follow-up data was complete for all patients.ResultsFactor analysis of the BDI10 yielded a one-factor model. The BDI10 had good reliability (α = .82) and correlated highly (r = .89) with the standard BDI measure of depressive symptoms; a BDI-derived proxy measure of the BDI10 correlated .94 with the actual BDI10 score. There were 41 events attributable to cardiac death (n = 24) or recurrent MI (n = 20). The mean level of depressive symptoms as measured by the BDI10 was significantly higher in patients who experienced an event (4.3 ± 4.4) compared with event-free patients (2.6 ± 2.8); p = 0.015. The BDI10 (HR:1.18; 95%CI:1.08–1.29, p < 0.0001) independently predicted death/recurrent MI adjusting for disease severity. Age, BMI and cardiac history were also independent predictors of death/recurrent MI in these analyses.LimitationsThe low number of women (22%), relatively healthy sample (mean LVEF = 52%) and lack of a structured interview as gold standard for assessment of depression.ConclusionsThe BDI10 is a brief, valid, and easy-to-use self-report measure of depressive symptoms that predicts post-MI outcomes and hence can be used clinically for risk stratification purposes, while reducing assessment burden.     

Exome sequencing compared with standard genetic tests for critically ill infants with suspected genetic conditions

PurposeAs exome sequencing (ES) is increasingly used as a diagnostic tool, we aimed to compare ES with status quo genetic diagnostic workup for infants with suspected genetic disorders in terms of identifying diagnoses, survival, and cost of care.MethodsWe studied newborns and infants admitted to intensive care with a suspected genetic etiology within the first year of life at a US quaternary-referral children’s hospital over 5 years. In this propensity-matched cohort study using electronic medical record data, we compared patients who received ES as part of a diagnostic workup (ES cohort, n = 368) with clinically similar patients who did not receive ES (No-ES cohort, n = 368).ResultsDiagnostic yield (27.4% ES, 25.8% No-ES; p = 0.62) and 1-year survival (80.2% ES, 84.8% No-ES; p = 0.10) were no different between cohorts. ES cohort patients had higher cost of admission, diagnostic investigation, and genetic testing (all p < 0.01).ConclusionES did not differ from status quo genetic testing collectively in terms of diagnostic yield or patient survival; however, it had high yield as a single test, led to complementary classes of diagnoses, and was associated with higher costs. Further work is needed to define the most efficient use of diagnostic ES for critically ill newborns and infants.     

Synaptic degradation of cardiac autonomic nerves in streptozotocin-induced diabetic rats

Background: Cardiac autonomic neuropathy (CAN) is a common complication in type I diabetes mellitus (DM). Nevertheless, the relationship between functional and structural disturbances of cardiac autonomic nerves remains unclear. Methods and results: To clarify this relationship, we studied heart rate variability (HRV) and ultrastructural changes of cardiac autonomic nerves in streptozotocin (STZ)-induced DM in rats. STZ was injected (65 mg/kg intravenous) into the tail vein of male Wistar rats to destroy β cells in the pancreatic islets. After STZ injection, fasting blood sugar (FBS) increased from baseline values of 75 ± 3 mg/dl up to 328 ± 12 mg/dl within 1 week and it reached up to 353 ± 24 mg/dl within 17 weeks. HR in these rats was decreased within 20 days and low HR was maintained for the observation period. TP and HF power started decreasing 20 days after STZ injection, and this decrease progressed throughout the observation period. The L/H power ratio was decreased 80 days after STZ. Electron microscopic findings indicated a depletion of neurotransmitter vesicles and degradation of parasympathetic nerve endings but not of sympathetic ones in the SA node region of the heart in the early stages of DM. In the late stages of DM, the same region showed degradation of both sympathetic and parasympathetic nerve endings. Conclusion: Synaptic degradation in parasympathetic nerves immediately after the onset of DM, and in sympathetic nerves much later in the development of DM is consistent with functional derangements in cardiac autonomic nerve activities assessed by HRV analysis.     

Lateral parapatellar approach with tibial tubercle osteotomy for the treatment of non-correctable valgus knee osteoarthritis: A retrospective clinical study

BackgroundThe aim of this retrospective study was to evaluate the efficacy of a lateral parapatellar approach combined with a tibial tubercle osteotomy (TTO) in patients undergoing total knee arthroplasty (TKA) with non-correctable valgus knee osteoarthritis.MethodsWe studied 53 consecutive patients (57 knees) who had a primary TKA via lateral parapatellar approach with a global step-cut “coffin” type TTO over a 10-year period. All patients had non-correctable grade II valgus deformity according to the Ranawat classification. The average age of patients was 71 years (45 to 77) and the mean follow-up was 39 months (20 to 98).ResultsPost-surgery, there was a significant improvement in knee extension (p = 0.002), flexion (p = 0.006), Knee Society Pain and Function Scores (p < 0.001) and WOMAC Osteoarthritis Index (p < 0.001). The tibiofemoral angle changed from a preoperative median value of 11 deg (10 to 17) to a postoperative value of 3.75 deg (0 to 9). Congruent patellar tracking was observed in all cases. All but one osteotomy united in a median period of 16.7 weeks (9 to 28) and no hardware removal was required. One knee developed infection treated with two-stage reconstruction. A proximal tibial stress fracture also occurred in a patient on long-term bisphosphonate therapy.ConclusionLateral parapatellar approach along with TTO is an effective technique for addressing non-correctable valgus knee deformity during TKA.     

Regular expression-based learning to extract bodyweight values from clinical notes

BackgroundBodyweight related measures (weight, height, BMI, abdominal circumference) are extremely important for clinical care, research and quality improvement. These and other vitals signs data are frequently missing from structured tables of electronic health records. However they are often recorded as text within clinical notes. In this project we sought to develop and validate a learning algorithm that would extract bodyweight related measures from clinical notes in the Veterans Administration (VA) Electronic Health Record to complement the structured data used in clinical research.MethodsWe developed the Regular Expression Discovery Extractor (REDEx), a supervised learning algorithm that generates regular expressions from a training set. The regular expressions generated by REDEx were then used to extract the numerical values of interest.To train the algorithm we created a corpus of 268 outpatient primary care notes that were annotated by two annotators. This annotation served to develop the annotation process and identify terms associated with bodyweight related measures for training the supervised learning algorithm. Snippets from an additional 300 outpatient primary care notes were subsequently annotated independently by two reviewers to complete the training set. Inter-annotator agreement was calculated.REDEx was applied to a separate test set of 3561 notes to generate a dataset of weights extracted from text. We estimated the number of unique individuals who would otherwise not have bodyweight related measures recorded in the CDW and the number of additional bodyweight related measures that would be additionally captured.ResultsREDEx’s performance was: accuracy = 98.3%, precision = 98.8%, recall = 98.3%, F = 98.5%. In the dataset of weights from 3561 notes, 7.7% of notes contained bodyweight related measures that were not available as structured data. In addition 2 additional bodyweight related measures were identified per individual per year.ConclusionBodyweight related measures are frequently stored as text in clinical notes. A supervised learning algorithm can be used to extract this data. Implications for clinical care, epidemiology, and quality improvement efforts are discussed.