Table 1 New‐onset knee pain in newly appointed workers by age, sex, occupational group, and anthropometrical and lifestyle characteristics.
| New‐onset knee pain at 1 year | New‐onset knee pain at 2 year | |||||
|---|---|---|---|---|---|---|
| Yes | No | Difference | Yes | No | Difference | |
| Baseline age (quartiles), years | ||||||
| 16–20 | 18 (10.5%) | 154 (89.5%) | χ2 trend: 3.28, p = 0.35 | 11 (8.5%) | 118 (91.5%) | χ2 trend: 0.99, p = 0.80 |
| 21–23 | 11 (6.1%) | 169 (98.9%) | 14 (9.7%) | 131 (91.3%) | ||
| 24–27 | 14 (9.9%) | 127 (90.1%) | 13 (12.3%) | 93 (87.7%) | ||
| >27 | 12 (6.7%) | 166 (93.3%) | 15 (10.9%) | 123 (89.1%) | ||
| Sex | ||||||
| Male | 33 (7.7%) | 398 (92.3%) | χ2: 0.47, p = 0.49 | 38 (11.8%) | 283 (88.2%) | χ2: 2.37, p = 0.12 |
| Female | 22 (9.2%) | 218 (90.8%) | 15 (7.6%) | 182 (92.4%) | ||
| Occupational group | ||||||
| Firefighters | 10 (9.3%) | 98 (70.7%) | * | 13 (14.9%) | 74 (85.1%) | * |
| Police | 1 (3.1%) | 31 (96.9%) | 0 (0%) | 27 (100%) | ||
| Army officers | 3 (8.3%) | 33 (91.7%) | 3 (13.6%) | 19 (86.4%) | ||
| Army infantry | 10 (34.5%) | 19 (65.5%) | 2 (22.2%) | 7 (77.8%) | ||
| Army clerks | 3 (7.0%) | 40 (93.0%) | 6 (16.2%) | 31 (83.8%) | ||
| Dentists | 4 (5.5%) | 69 (94.5%) | 3 (4.5%) | 63 (95.5%) | ||
| Podiatrists | 5 (10.2%) | 44 (89.8%) | 6 (14.6%) | 35 (85.4%) | ||
| Nurses | 1 (1.6%) | 61 (98.4%) | 3 (5.8%) | 49 (94.2%) | ||
| Foresters | 2 (11.1%) | 16 (88.9%) | 1 (6.3%) | 11 (91.7%) | ||
| Retail workers | 9 (10.6%) | 76 (89.4%) | 7 (11.1%) | 56 (88.9%) | ||
| Postal workers | 1 (2.2%) | 45 (97.8%) | 5 (17.9%) | 23 (82.1%) | ||
| Shipbuilders | 6 (6.7%) | 84 (93.3%) | 4 (5.4%) | 70 (94.6%) | ||
| Body mass index (kg/m2; quartiles) | ||||||
| <21.3 | 11 (6.4%) | 161 (93.6%) | χ2 trend: 0.20, p = 0.66 | 8 (5.8%) | 129 (94.2%) | χ2 trend: 1.07, p = 0.30 |
| 21.3–22.8 | 15 (9.6%) | 141 (90.4%) | 15 (12.6%) | 104 (87.4%) | ||
| 22.9–25 | 14 (8.9%) | 144 (91.1%) | 16 (12.3%) | 114 (87.7%) | ||
| >25.0 | 14 (8.0%) | 161 (92.0%) | 12 (9.7%) | 112 (90.3%) | ||
| Physically active† | ||||||
| No | 3 (4.9%) | 58 (95.1%) | χ2: 0.98, p = 0.32 | 4 (8.0%) | 46 (92.0%) | χ2: 0.32, p = 0.57 |
| Yes | 52 (8.6%) | 554 (91.4%) | 49 (10.6%) | 415 (89.4%) | ||
*χ2 estimate unstable because of low numbers in certain cells.
†Self‐report of frequent participation in sports or other physical activities.