| Self-reported complaints in 2005 | 2003 predictors | OR (95% CI) unadjusted | OR (95% CI) adjusted |
| Knee complaints >30 days during previous 12 months (yes/no) | Knee complaints >30 days (in 2003) | 7.98 (3.83 to 16.6) | 8.31 (3.71 to 18.6) |
| Used new working methods weekly/daily during 1 year or more | 0.53 (0.26 to 1.10) | 0.46 (0.20 to 1.06) | |
| Locking of the knee during previous 12 months (yes/no) | Locking of the knee (2003) | 11.5 (4.96 to 26.7) | 9.60 (3.75 to 24.6) |
| Knee complaints >30 days (in 2003) | 1.95 (0.81 to 4.74) | 3.53 (1.67 to 7.48) | |
| Used new working methods weekly/daily during 1 year or more | 0.38 (0.14 to 1.04) | 0.39 (0.16 to 0.94) | |
| Knee pain moderate to severe/no or light | Knee complaints >30 days (in 2003) | 7.47 (3.8 to 14.7) | 7.45 (3.91 to 14.2) |
| Used new working methods weekly/daily during 1 year or more | 0.26 (0.09 to 0.74) | 0.25 (0.09 to 0.70) | |
| Decrease in knee complaints during previous 12 months (yes/no) | Knee complaints >30 days (in 2003) | 1.76 (0.63 to 4.89) | 1.51 (0.57 to 4.02) |
| Used new working methods weekly/daily during 1 year or more | 0.26 (0.09 to 0.74) | 0.25 (0.09 to 0.70) | |
| Difficulties in carrying out work because of knee troubles (often or daily/no or seldom) | Knee complaints >30 days (in 2003) | 20.7 (2.37 to 180.3) | 24.4 (3.08–193.2) |
| Locking of the knee | 3.06 (0.84 to 11.2) | 4.04 (1.2 to 13.6) | |
| Bursitis | 1.41 (0.37 to 5.41) | 4.35 (1.32 to 14.3) | |
| Used new working methods weekly/daily during 1 year or more | 0.36 (0.07 to 1.87) | 0.33 (0.07 to 1.54) |
*Each covariate adjusted for all other factors: age, BMI, stress, use of new working methods, knee complaints >30 days in 2003.