Table 3

 Association between different definitions of radiographic hip osteoarthritis and clinical symptoms (n = 3561)

Hip painMorning stiffness OR (95% CI)Disability (LLD⩾0.5) OR (95% CI)Disability (LLD⩾1.0) OR (95% CI)
OR (95% CI)Sensitivity/ specificity (%)
Associations are presented as odds ratios (OR) with 95% confidence intervals (CI) in parentheses. Associations are adjusted for body mass index and radiographic osteoarthritis of the other hip.
LLD, lower limb disability index (a score of ⩾0.5 is defined as moderately disabled; a score of ⩾1.0 as severe disabled); MJS, minimal joint space.
Kellgren
    ⩾grade 22.6 (1.8 to 3.6)20.7/92.71.2 (0.9 to 1.6)2.4 (1.7 to 3.4)3.0 (2.0 to 4.4)
    ⩾grade 36.6 (3.6 to 12.1)12.5/97.92.2 (1.2 to 3.9)7.0 (3.8 to 12.8)7.6 (4.0 to 14.6)
MJS
    ⩽2.5 mm2.4 (1.7 to 3.4)14.9/93.31.6 (1.2 to 2.1)2.7 (2.0 to 3.7)3.0 (2.0 to 4.4)
    ⩽2.0 mm4.5 (2.9 to 7.0)9.3/97.81.7 (1.2 to 2.6)3.7 (2.4 to 5.9)4.1 (2.5 to 7.0)
    ⩽1.5 mm6.6 (3.6 to 12.2)5.5/99.12.0 (1.1 to 3.7)5.3 (2.9 to 9.8)6.1 (3.1 to 12.1)
Croft grade
    ⩾grade 31.3 (1.1 to 1.7)39.9/66.90.9 (0.7 to 1.0)1.0 (0.8 to 1.3)1.1 (0.8 to 1.5)
    ⩾grade 43.6 (2.4 to 5.2)11.7/96.41.6 (1.1 to 2.2)3.3 (2.3 to 4.9)3.7 (2.3 to 5.8)