Factors associated with physical activity frequency and type trajectories derived from the multivariable logistic regression.
| Frequency | Type | |||||||
|---|---|---|---|---|---|---|---|---|
| MSFreq, n = 703 (80.1%) | HDFreq, n = 175 (19.9%) | HDFreq(vs MSFreq) | LSWB, n = 549 (62.5%) | HDWB, n = 329 (37.5%) | HDWB (vs LSWB) | |||
| % | % | OR (95% CI) | P* | % | % | OR (95% CI) | P* | |
| Sex | 0.007 | |||||||
| Male | 77.3 | 22.7 | 52.4 | 47.6 | 1 | |||
| Female | 84.1 | 15.9 | 69.5 | 30.5 | 0.6 (0.4–0.9) | |||
| Age at inclusion, yrs | 0.01 | |||||||
| 40–49 | 91.7 | 8.3 | 1 | 52.8 | 47.2 | |||
| 50–59 | 85.2 | 14.8 | 2.2 (0.8–5.9) | 65.8 | 34.2 | |||
| ≥ 60 | 79.2 | 20.8 | 3.3 (1.3–8.5) | 64.9 | 35.1 | |||
| BMI, kg/m2 | 0.007 | |||||||
| Normal (< 25) | 82.5 | 17.5 | 55.2 | 44.8 | 1 | |||
| Overweight (25 to 29) | 79.6 | 20.4 | 55.6 | 44.4 | 1.0 (0.7–1.6) | |||
| Obese (> 30) | 84.0 | 16.0 | 78.3 | 21.7 | 0.5 (0.3–0.9) | |||
| Monthly income | 0.02 | |||||||
| Low (< €1220) | 75.7 | 24.3 | 1 | 75.7 | 24.3 | |||
| Intermediate (€1220–2440) | 82.8 | 17.2 | 0.6 (0.4–0.9) | 67.2 | 32.8 | |||
| High (≥ €2440) | 84.2 | 15.8 | 0.5 (0.3–0.9) | 56.6 | 43.4 | |||
| WOMAC function | 0.0007 | 0.02 | ||||||
| 1st tertile (0–20) | 80.2 | 19.8 | 1 | 50.5 | 49.5 | 1 | ||
| 2nd tertile (21–44) | 77.7 | 22.3 | 1.0 (0.7–1.6) | 61.9 | 38.1 | 0.8 (0.6–1.3) | ||
| 3rd tertile (45–100) | 88.0 | 12.0 | 0.4 (0.3–0.7) | 80.6 | 19.4 | 0.5 (0.3–0.8) | ||
| WOMAC pain | 0.003 | |||||||
| 1st tertile (0–20) | 79.6 | 20.4 | 56.0 | 44.0 | 1 | |||
| 2nd tertile (21–40) | 79.5 | 20.5 | 57.0 | 43.0 | 1.7 (1.1–2.7) | |||
| 3rd tertile (41–100) | 86.9 | 13.1 | 81.6 | 18.4 | 1.0 (0.5–1.9) | |||
| SF-36 vitality | 0.004 | |||||||
| 1st tertile (0–40) | 87.2 | 12.8 | 80.7 | 19.3 | 1 | |||
| 2nd tertile (40–60) | 80.4 | 19.6 | 60.6 | 39.4 | 2.2 (1.3–3.6) | |||
| 3rd tertile (60–100) | 78.1 | 21.9 | 52.7 | 47.3 | 2.2 (1.3–3.8) | |||
| Pain VAS | 0.002 | |||||||
| 1st tertile (0–21) | 81.1 | 18.9 | 51.5 | 48.5 | 1 | |||
| 2nd tertile (21–48) | 81.7 | 18.3 | 64.9 | 35.1 | 0.6 (0.4–0.9) | |||
| 3rd tertile (48–100) | 82.0 | 18.0 | 77.9 | 22.1 | 0.4 (0.3–0.7) | |||
| OAKHQOL physical activity | 0.03 | |||||||
| 1st tertile (0.625–58) | 84.7 | 15.3 | 81.1 | 18.9 | 1 | |||
| 2nd tertile (58.1–78.75) | 80.8 | 19.2 | 64.1 | 35.9 | 1.2 (0.7–2.1) | |||
| 3rd tertile (79–100) | 79.8 | 20.2 | 47.9 | 52.1 | 2.1 (1.1–3.9) | |||
↵* Only factors with a significant association at P = 0.2 in the bivariate analysis were entered into the multivariable model. Stepwise variable selection with significance level for entry into the model at P = 0.1 and with significance level for staying in the model at P = 0.05 was used. HDFreq: high and slightly decreasing frequency; HDWB: high and decreasing prevalence of weight-bearing activities; LSWB: low and stable prevalence of weight-bearing activities; MSFreq: moderate and stable frequency; OAKHQOL: Osteoarthritis Knee and Hip Quality Of Life questionnaire [0 (worst state) to 100 (best state)]; SF-36: Medical Outcomes Study 36-item Short Form survey [0 (worst state) to 100 (best state)]; VAS: visual analog scale; WOMAC: Western Ontario and McMaster Universities Osteoarthritis Index [0 (best state) to 100 (worst state)].