Long-Term Clinical Outcomes of Peritoneal Dialysis Patients: 9-Year Experience of a Single Center from North India

♦ Objective: There is a paucity of published data on the outcome of maintenance peritoneal dialysis (PD) since the initiation of continuous ambulatory PD (CAPD) in India in 1991. The purpose of this study is to report long-term clinical outcomes of PD patients at a single center.♦ Design: Retrospective study.♦ Setting: A government-owned tertiary-care hospital in North India.♦ Patients: Patients who were initiated on CAPD between October 2002 and June 2011, and who survived and/or had more than 6 months’ follow-up on this treatment with last follow-up till December 31, 2011, were studied.♦ Results: A total of 60 patients were included in the analysis. The mean age of the patients was 60.2 ± 9.2 years. The majority (65%) of the patients lived in rural areas. A high proportion (47%) were diabetic and 62% had ≥ 2 comorbidities. Total duration on peritoneal dialysis treatment was 1,773 patient-months (148 patient-years) with a mean duration of 29.6 ± 23 patient-months and median duration of 25 patient-months (range 6 - 110 patient-months). Overall patient and technique survival at 1, 2, 3, 4 and 5 years was 77%, 53%, 25%, 15%, and 10% respectively. Patient survival of diabetics vs non-diabetics at 1, 2, 3, 4, and 5 years was 68% vs 84%, 54% vs 53%, 14% vs 34%, 11% vs 19%, and 11% vs 13%, respectively. The mortality in non-diabetics (16/32) was less than that in diabetic (18/28) patients (p = not significant). The main cause of mortality in these patients was cardiac followed by sepsis. There were 58 episodes of peritonitis. The rate of peritonitis was 1 episode per 30.6 patient-months or 0.39 episodes per patient-year. Furthermore, the total number of episodes of peritonitis and number of episodes of peritonitis per patient were higher in the non-survival group (p < 0.05). The incidence of tuberculosis (TB), herpes zoster (HZ) and hernias was 15%, 10% and 5% respectively.♦ Conclusion: The study reports long-term outcomes of the PD patients, the majority of whom were elderly with a high burden of comorbidities. There was a high proportion of diabetics. The survival of diabetic vs non-diabetic and elderly vs non-elderly PD patients was similar in our study. The mortality in non-diabetics was less than that in diabetic patients. TB and HZ were common causes of morbidity. Peritonitis was associated with mortality in these patients.     

The Association Between Body Mass Index and Mortality on Peritoneal Dialysis: A Prospective Cohort Study

♦ Background: Previous studies have demonstrated that increased body mass index (BMI) is associated with decreased mortality in hemodialysis (HD) patients. However, the association between BMI and survival has not been well established in patients undergoing peritoneal dialysis (PD). The aim of the study was to determine the association between BMI and mortality in the PD population using the Clinical Research Center (CRC) registry for end-stage renal disease (ESRD) cohort in Korea.♦ Methods: Prevalent patients with PD were selected from the CRC registry for ESRD, a prospective cohort study on dialysis patients in Korea. Patients were categorized into four groups by quartiles of BMI. Cox regression analysis was used to calculate the adjusted hazard ratio (HR) of mortality with a BMI of quartile 2 (21.4 - 23.5 kg/m²) as the reference.♦ Results: A total of 900 prevalent patients undergoing PD were included. The median follow-up period was 24 months. The multivariate Cox proportional hazard model showed that the lowest quartile of BMI was associated with higher mortality (HR 3.00, 95% confidence interval (CI), 1.26 - 7.15). However, the higher quartiles of BMI were not associated with mortality compared with the reference category of BMI quartile 2 (Quartile 3: HR 1.11, 95% CI, 0.43 - 2.85, Quartile 4: HR 1.64, 95% CI, 0.66 - 4.06) after adjustment for clinical variables.♦ Conclusions: Lower BMI was a significant risk factor for death, but increased BMI was not associated with mortality in Korean PD patients.     

Impact of Break-In Period on the Short-Term Outcomes of Patients Started on Peritoneal Dialysis

♦ Objectives: Peritoneal dialysis (PD) is one of the first-line modalities of renal replacement therapy in patients with end-stage renal disease. Guidelines recommended a break-in period of at least 2 weeks before full PD start. However, the optimal duration of the break-in period is still unclear. In the present study, we investigated the effect of various break-in periods on short-term outcomes in patients on PD.♦ Methods: All patients who underwent Tenckhoff catheter implantation and initiated PD in Renji Hospital, Shanghai Jiao Tong University School of Medicine, between 1 January 2001 and 31 December 2010 were included. Patients were grouped according to the duration of their break-in period: 7 days or less (BI_≤7), 8 - 14 days (BI_8-14), and more than 14 days (BI_>14). Kaplan-Meier curves and log-rank tests were used to compare short-term outcomes in the various groups.♦ Results: Our study enrolled 657 patients (44.5% men), of whom 344, 137, and 176 patients were in the respective break-in groups. Compared with BI_>14 patients, BI_≤7 patients had a lower estimated glomerular filtration rate (5.34 ± 1.86 mL/min/1.73 m² vs 6.55 ± 1.71 mL/min/1.73 m², p < 0.001) and lower serum albumin (33.29 ± 5.36 g/L vs 36.64 ± 5.40 g/L, p < 0.001). The incidence of mechanical complications during the first 6 months was significantly higher in BI_≤7 patients than in BI_>14 patients (8.4% vs 1.7%, p = 0.004). However, we observed no significant differences between the three groups with respect to the prevalence of catheter dysfunction requiring surgical intervention (p > 0.05). Logistic regression analysis showed that BI_≤7 [relative risk: 4.322; 95% confidence interval (CI): 1.278 to 14.608; p = 0.019] was an independent predictor of catheter dysfunction, but not of catheter dysfunction requiring surgical intervention (p > 0.05). Catheter dysfunction [hazard ratio (HR): 20.087; 95% CI: 7.326 to 55.074; p < 0.001] and peritonitis (HR: 4.533; 95% CI: 1.748 to 11.751; p = 0.002) were risk factors for technique failure during the first 6 months, but BI_≤7 was not correlated with technique failure.♦ Conclusions: Patients starting PD with a break-in period of less than 1 week might experience a minor increased risk of mechanical complications, but no major effect on technique survival.     

The Negative Impact of Early Peritonitis on Continuous Ambulatory Peritoneal Dialysis Patients

♦ Background: Peritonitis rate has been reported to be associated with technique failure and overall mortality in previous literatures. However, information on the impact of the timing of the first peritonitis episode on continuous ambulatory peritoneal dialysis (CAPD) patients is sparse. The aim of this research is to study the influence of time to first peritonitis on clinical outcomes, including technique failure, patient mortality and dropout from peritoneal dialysis (PD).♦ Methods: A retrospective observational cohort study was conducted over 10 years at a single PD unit in Taiwan. A total of 124 patients on CAPD with at least one peritonitis episode comprised the study subjects, which were dichotomized by the median of time to first peritonitis into either early peritonitis patients or late peritonitis patients. Cox proportional hazard model was used to analyze the correlation of the timing of first peritonitis with clinical outcomes.♦ Results: Early peritonitis patients were older, more diabetic and had lower serum levels of creatinine than the late peritonitis patients. Early peritonitis patients were associated with worse technique survival, patient survival and stay on PD than late peritonitis patients, as indicated by Kaplan-Meier analysis (log-rank test, p = 0.04, p < 0.001, p < 0.001, respectively). In the multivariate Cox regression model, early peritonitis was still a significant predictor for technique failure (hazard ratio (HR), 0.54; 95% confidence interval (CI), 0.30 - 0.98), patient mortality (HR, 0.34; 95% CI, 0.13 - 0.92) and dropout from PD (HR, 0.50; 95% CI, 0.30 - 0.82). In continuous analyses, a 1-month increase in the time to the first peritonitis episode was associated with a 2% decreased risk of technique failure (HR, 0.98; 95% CI, 0.97 - 0.99), a 3% decreased risk of patient mortality (HR, 0.97; 95% CI, 0.95 - 0.99), and a 2% decreased risk of dropout from PD (HR, 98%; 95% CI, 0.97 - 0.99). Peritonitis rate was inversely correlated with time to first peritonitis according to the Spearman analysis (r = -0.64, p < 0.001).♦ Conclusions: Time to first peritonitis is significantly correlated with clinical outcomes of peritonitis patients with early peritonitis patients having poor prognosis. Patients with shorter time to first peritonitis were prone to having a higher peritonitis rate.     

体重指数及OGTT对血清瘦素水平的影响

目的 :观察肥胖者血清瘦素水平的变化及糖负荷对瘦素分泌的影响 ,进而探讨瘦素在人类肥胖发生中的作用。方法 :测定 2 0例非肥胖及 2 0例肥胖者空腹及OGTT后血清瘦素、胰岛素、血糖水平 ,同时测定糖化血红蛋白、甘油三酯及胆固醇水平。结果 :(1)肥胖组血清瘦素水平明显高于非肥胖组 (P <0 .0 0 1) ;(2 )与空腹状态相比 ,糖负荷后血清胰岛素水平升高 ,而瘦素水平呈下降趋势 ,但无显著差异 (P >0 .0 5 ) ;(3)相关分析显示 ,空腹血清瘦素水平与性别、体重指数 (BMI)和胰岛素水平具有相关性。结论 :人类肥胖的发生可能与瘦素抵抗而不是瘦素缺乏有关。短期血胰岛素水平升高对血清瘦素水平无明显影响     

Effect of Body Mass Index on Stroke Rehabilitation

Objective

To investigate the association between body mass index (BMI) and the functional progress of patients with stroke, admitted to a rehabilitation hospital.

Design

A retrospective cohort study.

Setting

A freestanding university rehabilitation hospital stroke unit.

Participants

All patients (N=819) admitted to the stroke unit of a rehabilitation hospital during the study.

Interventions

Not applicable.

Main Outcome Measures

The primary study outcome measure was the FIM efficiency of patients by BMI category.

Results

For the 819 patients admitted during the observation period, BMI was compared with FIM score changes per day (FIM efficiency). After adjusting for age and sex, the FIM efficiency differed by BMI. The underweight group had the lowest FIM efficiency, followed by the obese and normal-weight subgroups. The overweight group had the highest FIM efficiency (P=.05) when compared with the obese subgroup.

Conclusions

Among patients admitted to an acute rehabilitation hospital for stroke rehabilitation, overweight patients had better functional progress than did patients in the other weight categories.     

Effect of a Low-Cost Intervention on Recording Body Mass Index in Patients'' Records

PURPOSE: Evaluate the effectiveness of body mass index (BMI) tables placed in exam rooms as an intervention to encourage providers to calculate and record BMI scores in patients' medical records. DESIGN: In a prospective cohort design, medical record data for 276 adult patients at a federally funded community health center in New England were examined from August 2000 to August 2002 following the intervention. METHODS: Prominent, multicolored, laminated BMI tables were posted in the exam rooms of one of the study site's three primary health care teams. Medical record data collected included documentation of BMI calculation in medical records, documentation of an obesity diagnosis, and inclusion of heights and current weights. Frequency distributions were calculated; chi-square tests were used to identify associations. FINDINGS: In contrast to the comparison teams, patients on the intervention team were more likely to have BMI recorded in the medical record. A statistically significant increase in the diagnosis of obesity was observed throughout the health center after the intervention. CONCLUSIONS: Posting BMI tables in exam rooms contributed to increased BMI documentation in patients' medical records.     

体重指数、血甘油三酯水平与急性胰腺炎预后的关系

目的探讨体重指数(BMI)、高甘油三酯对急性胰腺炎(AP)预后的影响。方法选择重症急性胰腺炎(SAP)患者74例,轻症急性胰腺炎(MAP)患者85例,测定BMI、血脂水平以及血糖、血钙、肾功能及血氧分压等实验室检查指标。分肥胖组(BMI≥28kg/m~2)32例,超重组(24≤BMI＜28kg/m~2)66例和体重正常组(BMI＜24kg/m~2)61例。结果肥胖组SAP比例高于超重组和体重正常组;血脂升高伴随着更为严重的胰腺、肾功能及缺氧等损害;SAP患者BMI和血甘油三酯高于MAP组。结论体重指数、高甘油三酯血症与AP的关系密切,体重指数、血清甘油三酯水平与AP的病变程度呈正相关。体重指数、甘油三酯可作为急性胰腺炎的预后因素。     

Novel Equations for Estimating Lean Body Mass in Peritoneal Dialysis Patients

♦ Objectives:

To develop and validate equations for estimating lean body mass (LBM) in peritoneal dialysis (PD) patients.

♦ Methods:

Two equations for estimating LBM, one based on mid-arm muscle circumference (MAMC) and hand grip strength (HGS), i.e., LBM-M-H, and the other based on HGS, i.e., LBM-H, were developed and validated with LBM obtained by dual-energy X-ray absorptiometry (DEXA). The developed equations were compared to LBM estimated from creatinine kinetics (LBM-CK) and anthropometry (LBM-A) in terms of bias, precision, and accuracy. The prognostic values of LBM estimated from the equations in all-cause mortality risk were assessed.

♦ Results:

The developed equations incorporated gender, height, weight, and dialysis duration. Compared to LBM-DEXA, the bias of the developed equations was lower than that of LBM-CK and LBM-A. Additionally, LBM-M-H and LBM-H had better accuracy and precision. The prognostic values of LBM in all-cause mortality risk based on LBM-M-H, LBM-H, LBM-CK, and LBM-A were similar.

♦ Conclusions:

Lean body mass estimated by the new equations based on MAMC and HGS was correlated with LBM obtained by DEXA and may serve as practical surrogate markers of LBM in PD patients.     

Risk Factors for Mortality in Chinese Patients on Continuous Ambulatory Peritoneal Dialysis

♦ Objective: The intent of this study was to evaluate the clinical outcome and risk factors affecting mortality of the continuous ambulatory peritoneal dialysis (CAPD) patients in a single peritoneal dialysis (PD) center over a period of 10 years.♦ Patients and methods: We retrospectively analyzed patients on PD from June 2001 to June 2011. The clinical and biochemical data were collected from the medical records. Clinical variables included gender, age at the start of PD, smoking status, body mass index (BMI), cause of end-stage renal disease (ESRD), presence of diabetes mellitus and blood pressure. Biochemical variables included hemoglobin, urine volume, residual renal function (RRF), serum albumin, blood urea nitrogen (BUN), creatinine, total cholesterol, triglyceride, comorbidities, and outcomes. Survival curves were made by the Kaplan-Meier method. Univariate and multivariate analyses to identify mortality risk factors were performed using the Cox proportional hazard regression model.♦ Results: A total of 421 patients were enrolled, 269 of whom were male (63.9%). The mean age at the start of PD was 57.9 ± 14.8 years. Chronic glomerulonephritis was the most common cause of ESRD (39.4%). Estimation of patient survival by Kaplan-Meier was 92.5%, 80.2%, 74.4%, and 55.7% at 1, 3, 5, and 10 years, respectively. Patient survival was associated with age (hazard ratio [HR]: 1.641 [1.027 – 2.622], p = 0.038), cardiovascular disease (HR: 1.731 [1.08 – 2.774], p = 0.023), hypertriglyceridemia (HR: 1.782 [1.11 – 2.858], p = 0.017) in the Cox proportional hazards model analysis. Estimation of technique survival by Kaplan-Meier was 86.7%, 68.8%, 55.7%, and 37.4% at 1, 3, 5, and 10 years, respectively. In the Cox proportional hazards model analysis, age (HR: 1.672 [1.176 – 2.377], p = 0.004) and hypertriglyceridemia (HR: 1.511 [1.050 – 2.174], p = 0.026) predicted technique failure.♦ Conclusion: The PD patients in our center exhibited comparable or even superior patient survival and technical survival rates, compared with reports from other centers in China and other countries.     

成都地区中老年人群体质量指数及腹型肥胖对糖尿病患病率及空腹血糖水平的影响

目的研究成都地区中老年人群体质量指数(BMI)及腹型肥胖对糖尿病患病率及空腹血糖水平的影响。方法 2007年5月,采用随机抽样方法抽取50～80岁中老年人685人进行心血管危险因素调查,其男394人,女291人,年龄(63.3±0.2)岁。结果成都地区中老年人群的超重和肥胖所占的比例较大(约44.3%),按BMI分组(BMI<24 kg/m2;24 kg/m2≤BMI<28 kg/m2;BMI≥28 kg/m2)的糖尿病患病率分别为14.0%、18.7%及23.3%,组间差异有统计学意义(P=0.031)。男女分别按腹型肥胖标准分组(男性切点=85 cm,女性切点=80 cm),男性糖尿病患病率在非腹型肥胖及腹型肥胖组分别为17.9%及18.7%组间差异无统计学意义(P=0.849),女性糖尿病患病率分别为9.7%及18.4%,组间差异有统计学意义(P=0.034)。整个人群中,空腹血糖无随BMI增加而升高的趋势(P=0.071);女性人群中,空腹血糖随腰围的增加而升高(P=0.001);而在男性人群中无此趋势。在调整相关指标后,logistic回归分析提示BMI对糖尿病患病率独立影响,以BMI正常为参照,超重及肥胖的OR值分别为:1.412[95%CI(0.818,2.437),P=0.215]及2.200[95%CI(1.034,5.178),P=0.046]。在调整相关指标后,腹型肥胖在女性人群中对糖尿病患病率独立影响,以非腹型肥胖为参考,腹型肥胖的OR值为:1.394[95%CI(1.080,3.205),P=0.041],而在男性人群中无此关系。结论成都地区中老年人群超重及肥胖所占的比重较大,BMI可影响糖尿病患病率及空腹血糖水平;腹型肥胖能够影响女性人群糖尿病患病率及空腹血糖水平,但在男性人群中无此关系。     

超声诊断脂肪肝与体质指数分析

目的与方法：本文是应用脂肪肝的超声诊断标准和体质指数的判断标准,对检出的可颖脂肪肝、脂肪肝与体质指数进行分析。结果：在１９８名被检者中共检出可疑脂肪肝２５例、脂肪肝１９例、共计４４例,其检出率为２２．２２％。体质指数大于２５者其检出率为５６．６７％（３４／４０）;小于２５者其检出率为７．２５（１０／１３８）,经ｔ检验有非常显著差异（Ｐ〈０．００１）,肥胖组明显高于非肥胖组。体质指数分布与相应的检出     

Predictors of Residual Renal Function Decline in Patients Undergoing Continuous Ambulatory Peritoneal Dialysis

♦ Background: Residual renal function (RRF) is an important prognostic indicator in continuous ambulatory peritoneal dialysis (CAPD) patients. We determined the predictors of RRF loss in a cohort of incident CAPD patients.♦ Methods: We reviewed the record of 645 incident CAPD patients. RRF loss is represented by the slope of decline of residual glomerular filtration rate (GFR) as well as the time to anuria.♦ Results: The average rate of residual GFR decline was -0.083 ± 0.094 mL/min/month. The rate of residual GFR decline was faster with a higher proteinuria (r = -0.506, p < 0.0001) and baseline residual GFR (r = -0.560, p < 0.0001). Multivariate analysis showed that proteinuria, baseline residual GFR, and the use of diuretics were independent predictors of residual GFR decline. Cox proportional hazard model showed that proteinuria, glucose exposure, and the number of peritonitis episodes were independent predictors of progression to anuria, while a higher baseline GFR was protective. Each 1 g/day of proteinuria is associated with a 13.2% increase in the risk of progressing to anuria, each 10 g/day higher glucose exposure is associated with a 2.5% increase in risk, while each peritonitis episode confers a 3.8% increase in risk.♦ Conclusions: Our study shows that factors predicting the loss of residual solute clearance and urine output are different. Proteinuria, baseline residual GFR, and the use of diuretics are independently related to the rate of RRF decline in CAPD patients, while proteinuria, glucose exposure, and the number of peritonitis episodes are independent predictors for the development of anuria. The role of anti-proteinuric therapy and measures to prevent peritonitis episodes in the preservation of RRF should be tested in future studies.     

Effect of Increased Body Mass Index on the Accuracy of Estimated Fetal Weight by Sonography in Twins

Objective. The purpose of this study was to determine whether increasing body mass index (BMI) decreases the accuracy of sonographic estimations of fetal weight in twin gestations. Methods. A chart review was conducted, in which 361 charts of patients with twin gestations over a 2‐year period were reviewed. A total of 194 patients had sonographic examinations for fetal weight within 6 days of delivery and were included in the analysis. The difference between the sonographically estimated fetal weight was compared with the actual birth weight for each twin and stratified for the patient's BMI. Results. There was a significant increasing trend in mean absolute percent errors with increasing BMIs in both twins (P < .05). The mean absolute percent errors for twin A were 6% for patients with a BMI of less than 25 and 9% for those with a BMI of greater than 30. The mean absolute percent errors for twin B were 6.7% for patients with a BMI of less than 25 and almost 11.7% for those with a BMI of greater than 30. There was a significantly increasing trend in mean absolute differences in grams for both twins with increasing gestational age, with almost a 4‐fold increase from less than 28 weeks to greater than 36 weeks in both twins (P < .05). Conclusions. Increasing maternal obesity decreases the accuracy of sonographically determined fetal weight in twin gestations, particularly for twin B.     

Predictors of Peritonitis,Hospital Days,and Technique Survival for Peritoneal Dialysis Patients in a Managed Care Setting

♦ Introduction: Many clinicians perceive that peritoneal dialysis (PD) should be reserved for younger, healthier, more affluent patients. Our aim was to examine outcomes for PD patients in a managed care setting and to identify predictors of adverse outcomes.♦ Methods: We identified all patients who initiated PD at our institution between 1 January 2001 and 31 December 2010. Predictor variables studied included age, sex, race, PD modality, cause of end-stage renal disease (ESRD), dialysis vintage, Charlson comorbidity index (CCI) score, education, and income level. Poisson models were used to determine the relative risk (RR) of peritonitis and the number of hospital days per patient-year. The log-rank test was used to compare technique survival by patient strata.♦ Results: Among the 1378 patients who met the inclusion criteria, only female sex [RR: 0.85; 95% confidence interval (CI): 0.74 to 0.98; p = 0.02] and higher education (RR: 0.77; 95% CI: 0.60 to 0.98; p = 0.04) were associated with peritonitis. For hospital days, dialysis vintage (RR: 1.11; 95% CI: 1.04 to 1.18; p = 0.002), CCI score (RR: 1.06; 95% CI: 1.02 to 1.20; p = 0.002), and cause of ESRD (RR for glomerulonephritis: 0.59; 95% CI: 0.43 to 0.80; p = 0.0006; and RR for hypertension: 0.69; 95% CI: 0.55 to 0.88; p = 0.002) were associated with 1 extra hospital day per patient-year. The 2-year technique survival was 61% for patients who experienced at least 1 episode of peritonitis and 72% for those experiencing no peritonitis (p = 0.0001). Baseline patient age, primary cause of ESRD, and PD modality were the only other variables associated with technique survival in the study.♦ Conclusions: Neither race nor socio-economic status predicted technique survival or hospital days in our study. Female sex and higher education were the only two variables studied that had an association with peritonitis.