Table 1.
10-years incidence of osteoarthritis in hip, knee, and hand (in 2004).
| All (n = 1675) | Hip (N = 83) | Knee OA (N = 114) | Hand OA (N = 71) |
| BMI | |||
| < 20 (n = 133) | 3 (2.3) | 7 (5.3) | 8 (6.0) |
| 20 – 25 (n = 918) | 47(5.1) | 45 (4.9) | 36 (3.9) |
| 26–30 (n = 504) | 28 (5.6) | 49 (9.7) | 20(4.0) |
| > 30 (n = 87) | 5 (5.7) | 11 (12.6) | 7 (8.0) |
| Missing cases (n = 33) | - | - | - |
| Gender | |||
| Male (n = 732) | 28 (3.8) | 45 (6.1) | 18 (2.5) |
| Female (n = 943) | 55 (5.8) | 69 (6.8) | 53 (5.6) |
| Age | |||
| 1928–1930 (n = 158) | 22 (13.9) | 26 (16.5) | 11 (15.5) |
| 1938–1940 (n = 312) | 31 (9.9) | 37 (11.9) | 22 (7.1) |
| 1948–1950 (n = 453) | 23 (5.1) | 33 (7.3) | 27 (6.0) |
| 1958–1960 (n = 339) | 6 (1.8) | 10 (2.9) | 10 (2.9) |
| 1968–1970 (n = 413) | 1 (0.2) | 8 (1.9) | 1 (1.4) |
| Work status | |||
| Employed (n = 1277) | 51 (4.0) | 74 (5.8) | 46 (3.6) |
| Homeworkers (n = 117) | 10 (8.5) | 11 (9.4) | 10 (8.5) |
| Non-employed (n = 53) | 2 (3.8) | 4 (7.5) | 1 (1.9) |
| Disability pensioned (n = 86) | 12 (14.0) | 16 (18.6) | 11 (12.8) |
| Age pensioned (n = 55) | 5 (9.1) | 7 (12.7) | 3 (5.5) |
| Student (n = 76) | 1 (1.3) | 0 | 1 (1.3) |
| Missing cases (n = 11) | - | - | - |
| Leisure time physical activities | |||
| < 2 hours/week (n = 810) | 48 (5.9) | 55 (6.8) | 32 (4.0) |
| 2–4 hours/week (n = 606) | 36 (5.8) | 41 (6.8) | 23 (3.8) |
| > 4 hours/week (n = 228) | 6 (2.6) | 12 (5.3) | 12 (5.3) |
| Missing cases (n = 31) | - | - | - |
The results are presented according to body mass index, gender, age, work status, and level of leisure time activities (in 1994) in the general population of Ullensaker, Norway, initially free of rheumatic diseases (OA and RA) in 1994 (number and percentages of rows in parantheses).