Case control study 評讀等級

依據 US Agency for Health Care Policy and Research Classification(AHCPR, 1992)

Case control study(病例對照分析)(又稱為retrospective study) - 被歸為 III 等級。
(等級依序為Ia, Ib, IIa, IIb, III, IV)


依據Oxford Centre for Evidence-based medicine Levels of Evidence(May, 2001)


Case control study(病例對照分析)(又稱為retrospective study) - 被歸為 IV等級。
(等級依序為Ia, Ib, Ic, IIa, IIb, IIc, IIIa, IIIb,  IV, V)