Table 1

Some characteristics of the subjects of this study compared with all participants of the Rotterdam Study

This studyResearch centreInterview
Men (n) 115616901819
Age range (y)55.0–93.255.0–94.355.0–94.3
mean age (SD)68.6 (7.5)68.5 (7.7)68.9 (8.0)
% (95% CI) % (95% CI) % (95% CI)
Locomotor disability20.2 (17.9, 22.5)19.9 (18.0, 21.8)21.9 (20.0, 23.8)
Hip pain8.3 (6.7, 9.9)8.3 (7.0, 9.6)8.5 (7.2, 9.8)
Knee pain12.6 (10.7, 14.5)12.2 (10.6, 13.8)12.5 (11.0, 14.0)
Morning stiffness4.6 (3.4, 5.8)4.6 (3.6, 5.6)4.6 (3.6, 5.6)
Women (n) 173925772817
Age range (y)55.0–94.055.0–95.655.0–95.6
mean age (SD)69.4 (8.1)69.2 (8.3)69.7 (8.8)
% (95% CI) % (95% CI) % (95% CI)
Locomotor disability31.9 (29.7, 34.1)32.5 (30.7, 34.3)34.8 (33.0, 36.6)
Hip pain16.6 (14.9, 18.3)16.3 (14.9, 17.7)16.4 (15.0, 17.8)
Knee pain22.3 (20.3, 24.3)22.9 (21.3, 24.5)22.6 (21.1, 24.1)
Morning stiffness8.6 (7.3, 9.9)9.2 (8.1, 10.3)9.2 (8.1, 10.3)