Table 6

 Radiographic severity, pain, and function and relative risk of total hip replacement

Risk factorsCohort studiesCase-control studies
No of studiesRR (95% CI)No of studiesOR (95% CI)
*Defined as Croft grade ⩾2, or joint space of ⩽2 mm.
All values are adjusted by age, sex, and body mass index. A pooled RR/OR was estimated for more than one study.
Overall x ray change*42.39 (1.74 to 3.29)11.98 (1.23 to 3.19)
Croft grade1
    0/11
    23.36 (0.31 to 38.91)
    315.23 (3.29 to 70.49)
    444.51 (10.04 to 197.48)
    557.29 (12.12 to 270.71)
Pain (⩾50%)11.86 (1.23 to 3.88)11.91 (1.43 to 2.56)
Lequesne function (⩾10)22.75 (1.98 to 3.82)11.75 (1.24 to 2.48)