Table 2 Mean physical function score * at 4 measurements by age group according to SES
|  | <70 years | ≥70 years | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Â | 1992/1993 | 1995/1996 | 1998/1999 | 2001/2001 | 1992/1993 | 1995/1996 | 1998/1999 | 2001/2001 | ||||||||
| Â | n | Mean (SD) | n | Mean (SD) | N | Mean (SD) | n | Mean (SD) | N | Mean (SD) | n | Mean (SD) | n | Mean (SD) | n | Mean (SD) |
Education | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   High | 400 | 23.4 (2.1) | 389 | 23.0 (2.6) | 363 | 22.7 (3.0) | 329 | 22.3 (3.2) | 261 | 21.3 (4.2) | 257 | 19.9 (5.1) | 173 | 18.9 (6.0) | 113 | 18.8 (5.8) |
   Medium | 419 | 23.1 (2.4) | 412 | 22.5 (3.3) | 370 | 22.5 (3.2) | 323 | 21.8 (3.7) | 310 | 20.8 (4.7) | 305 | 19.8 (5.6) | 233 | 18.8 (5.5) | 145 | 18.7 (5.6) |
   Low | 442 | 22.4 (3.4) | 425 | 21.9 (3.7) | 388 | 21.2 (4.4) | 339 | 20.6 (4.6) | 531 | 19.1 (5.6) | 510 | 17.8 (6.1) | 345 | 16.6 (6.5) | 219 | 15.7 (6.4) |
Overall | 1261 | 22.9 (2.7) | 1226 | 22.5 (3.3) | 1121 | 22.1 (3.6) | 991 | 21.6 (3.9) | 1102 | 20.1(5.2) | 1072 | 18.8 (5.8) | 751 | 17.8 (6.2) | 477 | 17.4 (6.2) |
Income | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   High | 552 | 23.4 (1.8) | 543 | 23.1 (2.4) | 499 | 22.9 (2.6) | 457 | 22.4 (2.9) | 248 | 20.9 (4.3) | 246 | 19.9 (5.1) | 177 | 18.8 (5.8) | 113 | 18.8 (5.9) |
   Medium | 445 | 22.9 (2.7) | 432 | 22.4 (3.1) | 394 | 21.9 (3.6) | 355 | 21.3 (4.1) | 339 | 21.2 (4.3) | 326 | 19.6 (5.4) | 247 | 18.2 (6.3) | 157 | 18.0 (6.0) |
   Low | 248 | 21.8 (4.0) | 236 | 21.3 (4.7) | 218 | 20.6 (5.0) | 176 | 19.8 (5.2) | 479 | 19.1 (5.8) | 465 | 18.0 (6.1) | 318 | 17.2 (6.1) | 204 | 16.2 (6.1) |
Overall | 1245 | 22.9 (2.8) | 1211 | 22.5 (3.3) | 1111 | 22.1 (3.6) | 988 | 21.6 (4.0) | 1066 | 20.2 (5.1) | 1037 | 19.0 (5.7) | 742 | 17.9 (6.1) | 474 | 17.4 (6.1) |