High acquisition rate and internal validity in the Scandinavian Obesity Surgery Registry

BackgroundThe Scandinavian Obesity Surgery Registry (SOReg) is a national quality register that has collected data on bariatric surgery in Sweden since 2007.ObjectiveEvaluate the acquisition rate and internal validity of entered data in SOReg as well as completeness.SettingsNational quality register, Sweden.MethodThe acquisition rate during 2012–2018 was compared with Swedish national databases, while registered data in 89 selected variables (67 mandatory) was compared with medical records of 1860 randomly selected patients from all bariatric centers (n = 39–43) reporting to SOReg. The evaluation was done by 1 independent observer. Completeness of data in the entire registry for the same time period was studied.ResultsThe acquisition rate was 97.4%, because 33,716 of 34,628 patients recorded in the National Inpatient Registry were registered in SOReg. Exact agreement of reabstracted data was seen in 99.0% of 100,200 unique entries. All studied variables had an almost perfect agreement with Cohen’s kappa ranging from .87–1, that is, >.81 according to Landis and Koch criteria. In addition, .3% (n = 301) missing data entries were discovered, mostly in administrative variables. In the mandatory variables, overall completeness was high; however, declining with time in parallel with reduced follow-up rate, 50% at 5 years.ConclusionThe high acquisition rate and internal validity implies that SOReg reflects Swedish bariatric surgery on a nationwide basis. Hence, SOReg data can be used to monitor quality of care and in research. The overall completeness could be improved by a higher registration rate during long-term follow-up.     

Static and dynamic validation of inertial measurement units

Optical motion capture systems are used to assess human motion. While these systems provide a reliable analysis, they limit collection to a laboratory based setting. Devices such as Inertial Measurement Units (IMUs) have been developed as alternative tools. Commercially available IMUs are utilized for a variety of applications; however limited work has been done to determine the reliability of these devices. The objective of this study was to assess the accuracy and precision of a commercially available IMU, containing tri-axial accelerometers, gyroscopes, and magnetometers, under controlled static and dynamic conditions. The sensor output was validated against the gold standard measures of custom made mechanical testing apparatuses. The IMUs provide an accurate (within 0.6°) and precise (within 0.1°) measurement of static sensor orientation and an accurate (within 4.4° per second) and precise (within 0.2° per second) representation of angular velocity. The sensors are more accurate at lower velocities, but the percent error remains relatively constant across all angular velocities. Inclusion of IMUs as an appropriate measurement tool should be based on the application, specific demands and necessary reliability.     

Adaptation of the Youth Connectedness to Provider scale to assess the relationship between health professionals and adolescent and young adult patients

ObjectiveThe aim was to adapt an instrument that evaluates the relationship between young individuals and health professionals to the Brazilian population, which will be called the Escala de Avaliação de Vínculo entre Jovens e Profissionais de Saúde (Youth Connectedness to Provider scale).MethodThe questionnaire known as the Youth Connectedness to Provider scale consists of seven Likert-like questions. The translation, back-translation, evaluation by ten specialists, and pre-test with 43 adolescents and young adults aged between 10 and 24 years were performed to assess the clarity and reliability of meanings. The content validity index was calculated for each question. Subsequently, the clinical validation was performed with 83 patients aged 10–24 years old and Cronbach's alpha coefficient was calculated.ResultsA content validity index >0.8 (considered satisfactory) was obtained for all items analyzed by experts and adolescents. At the clinical validation, it showed a high internal consistency (Cronbach’s alpha = 0.76). The questions showed a good correlation, except for the question about judgment (Spearman’s rho = 0.03–0.19).ConclusionsThe scale adaptation showed an adequate agreement rate at the translation evaluation and a good reliability index in the questions. This instrument provides information on strengths and topics that require more attention from professionals to improve the relationship with their patients; it can be a valuable parameter in assessing the medical consultation quality.     

Prognostic models for mortality after cardiac surgery in patients with infective endocarditis: a systematic review and aggregation of prediction models

BackgroundThere are several prognostic models to estimate the risk of mortality after surgery for active infective endocarditis (IE). However, these models incorporate different predictors and their performance is uncertain.ObjectiveWe systematically reviewed and critically appraised all available prediction models of postoperative mortality in patients undergoing surgery for IE, and aggregated them into a meta-model.Data sourcesWe searched Medline and EMBASE databases from inception to June 2020.Study eligibility criteriaWe included studies that developed or updated a prognostic model of postoperative mortality in patient with IE.MethodsWe assessed the risk of bias of the models using PROBAST (Prediction model Risk Of Bias ASsessment Tool) and we aggregated them into an aggregate meta-model based on stacked regressions and optimized it for a nationwide registry of IE patients. The meta-model performance was assessed using bootstrap validation methods and adjusted for optimism.ResultsWe identified 11 prognostic models for postoperative mortality. Eight models had a high risk of bias. The meta-model included weighted predictors from the remaining three models (EndoSCORE, specific ES-I and specific ES-II), which were not rated as high risk of bias and provided full model equations. Additionally, two variables (age and infectious agent) that had been modelled differently across studies, were estimated based on the nationwide registry. The performance of the meta-model was better than the original three models, with the corresponding performance measures: C-statistics 0.79 (95% CI 0.76–0.82), calibration slope 0.98 (95% CI 0.86–1.13) and calibration-in-the-large –0.05 (95% CI –0.20 to 0.11).ConclusionsThe meta-model outperformed published models and showed a robust predictive capacity for predicting the individualized risk of postoperative mortality in patients with IE.Protocol registrationPROSPERO (registration number CRD42020192602).     

Adaptación y validacion al español de un cuestionario específico de calidad de vida en pacientes con traqueostomía (TQOL)

Background and objectiveA long-term tracheostomy can have significant negative effects on quality of life because it causes physical, functional, sensory, psychological, social, economic, and work impairments to the life of the individual. The objective of this study was to validate in Spanish a quality-of-life questionnaire for these patients.Materials and methodsA psychometric validation study of a questionnaire in 45 patients over 18 years of age, with tracheostomy for six months, who understand Spanish and have a good understanding of the questions of the SF-36 questionnaire and a specific quality of life questionnaire for the patient with tracheostomy (TQOL-versión española). This questionnaire is a modification and cultural adaptation into Spanish of the original English instrument named Tracheostomy Specific Quality of Life Questionnaire (TQOL). The 2 questionnaires (TQOL-versión española) and the SF-36 were completed 6 months after the tracheostomy and between 30 and 50 days after the first administration. The reliability, repeatability, and construct validity of the TQOL-versión española were evaluated. The construct validity was assessed by the correlation between the results of the TQOL-versión española and the dimensions of the SF-36 questionnaire.ResultsThe reliability of the TQOL-versión española measured by Cronbach's alpha coefficient was .814, with variation between items from .783 to .817 in the sample at 6 months and from .794 in the validation sample, with variation between items from .758 to .813. There was intraclass correlation for the total score of the scale using the concordance analysis of Bland-Altman and agreement for the individual questions with the McNemar symmetry test. There was also a good correlation between the scales of the TQOL-versión española and the dimensions of the S-F36.ConclusionsThe TQOL-versión española showed good reliability, repeatability, and construct validity, therefore it is a useful tool to assess the impact on individual patients with a tracheostomy in place for more than 6 months, and to establish strategies at the healthcare and social levels to improve the quality of daily life.     

Adaptación transcultural al contexto español y evaluación de la validez de contenido del cuestionario Second Victim Experience and Support Tool (SVEST-E)

ObjectivesTo carry out a cross-cultural adaptation of the Second Victim Experience and Support Tool (SVEST) questionnaire to the Spanish context, and to evaluate its content validity (CVI).MethodsThe translation and cultural adaptation of a measuring instrument by means of translation and back translation conducted through the participation of 20 health professionals. The content validation was carried out through the participation of 10 experts. The content validity of each item (CVI-I), the content validity index per expert (CVI-E) and the content validity total (CVI-T) were calculated for the questionnaire. Corrections were carried out for probable random agreement and the statistical calculation Kappa (K*) modified for each item of the instrument.ResultsThe final instrument obtained (SVEST-E) has a CVI-Total of 0.87 and consists of 36 total items, subdivided into 7 dimensions, 2 outcome variables and a support option section maintaining the same structure as the original questionnaire. Thirty items had a CVI-I with values over ≥̊0.79.ConclusionsThe SVEST-E questionnaire is an equivalent of the original and is an instrument that could help to evaluate the second victim experiences of healthcare professionals in our country. It is an instrument with adequate content validity to measure the experience of second victims in health professionals in our country.     

Disqualification of Neoadjuvant Rectal Score Based on Data of 6596 Patients From the Netherlands Cancer Registry

BackgroundThe neoadjuvant rectal score (NAR) was developed as a surrogate endpoint for overall survival in patients with rectal cancer after neoadjuvant treatment. We aimed to validate the NAR score in patients from the Netherlands Cancer Registry database.Patients and MethodsWe studied patients with rectal cancer treated with long-course neoadjuvant therapy followed by surgery in the Netherlands between 2007 and 2014. The probability of concordance with overall survival and the goodness of fit of several models were evaluated using Harrell's concordance index (c index) and the Akaike information criterion (AIC), which is used to compare the quality of statistical models.ResultsThe NAR score resulted in a c index of 0.665. We found that single pathologic parameters (pT or pN) have similar concordance as the NAR formula (c index of 0.663 and 0.655, respectively). A combination of pT and pN resulted in better concordance with the true endpoint, overall survival (c index 0.684), and a simple Cox regression model with the 3 parameters included in the NAR formula (cT, pT, and pN) improved the concordance even more (c index 0.689). When the AIC index was compared for all models, the NAR score model showed the worst fit to the true endpoint.ConclusionWe found no additional value for using the NAR formula as a surrogate endpoint for overall survival in rectal cancer patients treated with neoadjuvant therapy.     

Reliability and Construct Validity of the Malay Version of Theory of Planned Behaviour (TPB) for Smoking Cessation

Objective: The aim of this study was to evaluate the psychometric properties of the Malay translated version ofthe Theory of Planned Behavior (TPB) intention to quit smoking questionnaire. Methods: A cross-sectional studywas performed involving 185 male smokers. The forward-backward translation procedure was adopted to translate thequestionnaire from English to Malay. The internal consistency and stability were assessed using Cronbach’s alpha and acorrelation analysis and Exploratory Factor Analysis was conducted. Result: The translated questionnaire showed goodinternal consistency with Cronbach’s alpha values of 0.86, 0.64, 0.74 and 0.90 for each of the four respective factors.The test-retest reliability revealed acceptable stability, with Spearman’s correlation coefficients ranging from low tomoderate (r>0.30-0.50) and a satisfactory inter class correlation coefficient (ICCs). The construct validity achieved anacceptable factor loading for each construct which ranged from 0.40 to 0.90. Conclusion: The current study providedpsychometric evidence for an appropriate, reliable and valid tool of TPB Malay version. This questionnaire could beapplied in evaluating smoking cessation interventions in Malaysia.