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A population-based risk algorithm for the development of diabetes: development and validation of the Diabetes Population Risk Tool (DPoRT).
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- Author(s): Rosella, Laura C.; Manuel, Douglas G.; Burchill, Charles; Stukel, Thérèse A.
- Source:
Journal of Epidemiology & Community Health; Jul2011, Vol. 65 Issue 7, p613-620, 8p, 5 Charts, 1 Graph- Subject Terms:
DIABETES risk factors; AGE distribution; ANALYSIS of variance; CALIBRATION; CHI-squared test; DISCRIMINANT analysis; REPORTING of diseases; ETHNIC groups; EXPERIMENTAL design; HEART diseases; IMMIGRANTS; RESEARCH methodology; PUBLIC health surveillance; RESEARCH evaluation; RESEARCH funding; RISK assessment; SMOKING; EDUCATIONAL attainment; BODY mass index; PREDICTIVE validity; RESEARCH methodology evaluation - Source:
- Additional Information
- Subject Terms:
- Abstract: Background National estimates of the upcoming diabetes epidemic are needed to understand the distribution of diabetes risk in the population and to inform health policy. Objective To create and validate a population-based risk prediction tool for incident diabetes using commonly collected national survey data. Methods With the use of a cohort design that links baseline risk factors to a validated population-based diabetes registry, a model (Diabetes Population Risk Tool (DPoRT)) was developed to predict 9-year risk for diabetes. The probability of developing diabetes was modelled using sex-specific Weibull survival functions for people >20 years of age without diabetes (N=19 861). The model was validated in two external cohorts in Ontario (N=26 465) and Manitoba (N=9899). Predictive accuracy and model performance were assessed by comparing observed diabetes rates with predicted estimates. Discrimination and calibration were measured using a C statistic and Hosmer--Lemeshow X2 statistic (X2
H-L ). Results Predictive factors included were body mass index, age, ethnicity, hypertension, immigrant status, smoking, education status and heart disease. DPoRT showed good discrimination (C=0.77-0.80) and calibration (X2H-L <20) in both external validation cohorts. Conclusions This algorithm can be used to estimate diabetes incidence and quantify the effect of interventions using routinely collected survey data. [ABSTRACT FROM AUTHOR] - Abstract: Copyright of Journal of Epidemiology & Community Health is the property of BMJ Publishing Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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