|  | Two years |  | Five years | ||||
---|---|---|---|---|---|---|---|---|
 | n/N (%) | ORa | 95% CI | P-value | n/N (%) | ORa | 95% CI | P-value |
Limitations in walking | Â | Â | Â | Â | Â | Â | Â | Â |
 RAa | 50/141 (35.5%) | 1.0 (ref) |  |  | 38/97 (39.2%) | 1.0 (ref) |  |  |
 Osteoarthritis | 1298/4815 (27%) | 0.7 | (0.5 to 1.0) | 0.04 | 927/2723 (34%) | 0.8 | (0.5 to 1.2) | 0.32 |
 AVN | 113/397 (28.5%) | 0.7 | (0.5 to 1.1) | 0.15 | 74/250 (29.6%) | 0.7 | (0.4 to 1.1) | 0.10 |
 Other | 70/201 (34.8%) | 1.0 | (0.6 to 1.6) | 0.91 | 51/145 (35.2%) | 0.8 | (0.5 to 1.5) | 0.55 |
Limitations in climbing stairs | Â | Â | Â | Â | Â | Â | Â | Â |
 RA | 53/144 (36.8%) | 1.0 (ref) |  |  | 38/98 (38.8%) | 1.0 (ref) |  |  |
 Osteoarthritis | 818/4873 (16.8%) | 0.3 | (0.2 to 0.5) | <0.01 | 562/2739 (20.5%) | 0.4 | (0.3 to 0.6) | <0.01 |
 AVN | 77/397 (19.4%) | 0.4 | (0.3 to 0.6) | <0.01 | 48/250 (19.2%) | 0.4 | (0.2 to 0.6) | <0.01 |
 Other | 55/202 (27.2%) | 0.6 | (0.4 to 1.0) | 0.07 | 43/145 (29.7%) | 0.7 | (0.4 to 1.2) | 0.15 |
Limitations in putting on socks/shoes | Â | Â | Â | Â | Â | Â | Â | Â |
 RA | 57/143 (39.9%) | 1.0 (ref) |  |  | 37/97 (38.1%) | 1.0 (ref) |  |  |
 Osteoarthritis | 1178/4867 (24.2%) | 0.5 | (0.3 to 0.7) | <0.01 | 725/2733 (26.5%) | 0.6 | (0.4 to 0.9) | 0.02 |
 AVN | 85/400 (21.3%) | 0.4 | (0.3 to 0.6) | <0.01 | 68/253 (26.9%) | 0.6 | (0.4 to 1.0) | 0.05 |
 Other | 74/201 (36.8%) | 0.9 | (0.6 to 1.4) | 0.59 | 54/144 (37.5%) | 1.0 | (0.6 to 1.7) | 0.92 |
Limitations in picking up objects | Â | Â | Â | Â | Â | Â | Â | Â |
 RA | 55/145 (37.9%) | 1.0 (ref) |  |  | 40/98 (40.8%) | 1.0 (ref) |  |  |
 Osteoarthritis | 1153/4873 (23.7%) | 0.5 | (0.4 to 0.7) | <0.01 | 730/2735 (26.7%) | 0.5 | (0.3 to 0.8) | <0.01 |
 AVN | 92/399 (23.1%) | 0.5 | (0.3 to 0.7) | <0.01 | 63/252 (25%) | 0.5 | (0.3 to 0.8) | <0.01 |
 Other | 68/203 (33.5%) | 0.8 | (0.5 to 1.3) | 0.41 | 50/146 (34.2%) | 0.8 | (0.4 to 1.3) | 0.32 |
Limitations in getting in/out of car | Â | Â | Â | Â | Â | Â | Â | Â |
 RA | 29/144 (20.1%) | 1.0 (ref) |  |  | 21/98 (21.4%) | 1.0 (ref) |  |  |
 Osteoarthritis | 703/4864 (14.5%) | 0.7 | (0.4 to 1.0) | 0.06 | 488/2745 (17.8%) | 0.8 | (0.5 to 1.3) | 0.39 |
 AVN | 63/401 (15.7%) | 0.7 | (0.4 to 1.2) | 0.24 | 40/251 (15.9%) | 0.7 | (0.4 to 1.3) | 0.26 |
 Other | 48/202 (23.8%) | 1.2 | (0.7 to 2.1) | 0.43 | 36/146 (24.7%) | 1.2 | (0.6 to 2.3) | 0.58 |
Limitations in rising from chair | Â | Â | Â | Â | Â | Â | Â | Â |
 RA | 25/144 (17.4%) | 1.0 (ref) |  |  | 14/98 (14.3%) | 1.0 (ref) |  |  |
 Osteoarthritis | 353/4852 (7.3%) | 0.4 | (0.2 to 0.6) | <0.01 | 272/2727 (10%) | 0.7 | (0.4 to 1.2) | 0.17 |
 AVN | 39/401 (9.7%) | 0.5 | (0.3 to 0.9) | 0.02 | 30/252 (11.9%) | 0.8 | (0.4 to 1.6) | 0.55 |
 Other | 24/201 (11.9%) | 0.6 | (0.4 to 1.2) | 0.16 | 18/143 (12.6%) | 0.9 | (0.4 to 1.8) | 0.70 |
Limitations in sitting | Â | Â | Â | Â | Â | Â | Â | Â |
 RA | 1/143 (0.7%) | 1.0 (ref) |  |  | 1/97 (1%) | 1.0 (ref) |  |  |
 Osteoarthritis | 44/4850 (0.9%) | 1.3 | (0.2 to 9.5) | 0.8 | 26/2724 (1%) | 0.9 | (0.1 to 6.9) | 0.94 |
 AVN | 9/396 (2.3%) | 3.3 | (0.4 to 26.3) | 0.3 | 7/251 (2.8%) | 2.8 | (0.3 to 22.7) | 0.35 |
 Other | 2/200 (1.0%) | 1.4 | (0.1 to 16.0) | 0.8 | 3/144 (2.1%) | 2.0 | (0.2 to 20.0) | 0.54 |