Generalizability of a prediction rule for sick leave due to shoulder pain.

The article examines the generalizability of a prediction rule for sick leave developed from the Dutch shoulder study (DSS). After studying the calibration and discrimination in the validation cohorts, results showed that the prediction rule for sick leave related to shoulder pain in 6-month period following the first consultation in primary care showed adequate generalizability to another population of workers with shoulder pain participating in an observational cohort study.