قارن الطرق

	تقييم اختبارات الفحص متعددة المراكز	دراسة استشرافية لدقة التشخيص
المجال	علم الأوبئة	علم الأوبئة
العائلة	Process / pipeline	Process / pipeline
سنة النشأة	1976–2003 (core diagnostic accuracy framework; multicenter STARD standards formalized 2003)	Formalized 2000s; practice dates to mid-20th century
صاحب الطريقة	Methodological consensus (STARD group, Bossuyt et al.); broader diagnostic accuracy tradition rooted in Hanley & McNeil (1982) and Sackett & Haynes (1976)	Established through STARD initiative (Bossuyt, Reitsma et al., 2000s)
النوع	Observational diagnostic accuracy study	Observational / evaluative study design
المصدر التأسيسي	Bossuyt, P. M., Reitsma, J. B., Bruns, D. E., Gatsonis, C. A., Glasziou, P. P., Irwig, L. M., Lijmer, J. G., Moher, D., Rennie, D., & de Vet, H. C. W. (2003). Towards complete and accurate reporting of studies of diagnostic accuracy: The STARD Initiative. Annals of Internal Medicine, 138(1), 40-44.	Bossuyt, P. M., Reitsma, J. B., Bruns, D. E., Gatsonis, C. A., Glasziou, P. P., Irwig, L., ... & Cohen, J. F. (2015). STARD 2015: an updated list of essential items for reporting diagnostic accuracy studies. BMJ, 351, h5527.
الأسماء البديلة	multicenter diagnostic accuracy study, multisite screening evaluation, multicenter test performance study, multicenter DTA study	prospective DTA study, prospective test accuracy study, forward-looking diagnostic study, prospective index test evaluation
ذات صلة	6	6
الملخص	A multicenter screening test evaluation measures the diagnostic accuracy of a screening test — its sensitivity, specificity, predictive values, and ROC-curve area — by enrolling participants across two or more independent clinical sites. Conducting the study at multiple centers broadens the patient spectrum, tests generalizability across different laboratory conditions and patient populations, and produces more externally valid accuracy estimates than a single-center study.	A prospective diagnostic accuracy study enrolls participants before any test results are known and follows them forward in time to evaluate how well an index test (the test under evaluation) distinguishes individuals with and without a target condition, using a reference standard applied independently. Key accuracy metrics include sensitivity, specificity, positive and negative predictive values, and the area under the ROC curve. The prospective design reduces many biases inherent in retrospective test evaluations.