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Table 1 Comparison between included and excluded participants
| Excluded n = 337 | Evaluated n = 663 | p-value | ||
|---|---|---|---|---|
| Age (years) Mean (SD) | 56.5 (14.1) | 58.0 (15.2) | <0.01 | |
| Sex n (%) | Female | 197 (58.5) | 371 (56.0) | 0.45 |
| Marital status n (%) | Married/civil union | 238 (70.6) | 454 (68.5) | 0.46 |
| Single/divorced/widow | 99 (29.4) | 209 (31.5) | ||
| Years of education n (%) | 0-4 years | 92 (27.3) | 202 (30.5) | 0.77 |
| 5-9 years | 89 (26.4) | 172 (25.9) | ||
| 10-12 years | 56 (16.6) | 104 (15.7) | ||
| ≥12 years | 100 (29.7) | 185 (27.9) | ||
| Occupation n (%) | White collar occupations | 226 (67.1) | 422 (63.6) | 0.53 |
| Blue collar occupations | 79 (23.4) | 167 (25.2) | ||
| Other (unemployed, student, never had a job) | 32 (9.5) | 74 (11.2) | ||
| Current occupation status n (%) | Working | 157 (46.6) | 294 (44.3) | 0.74 |
| Retired | 133 (39.5) | 267 (40.3) | ||
| Other (unemployed, student, never had a job) | 47 (13.9) | 102 (15.4) | ||
| Regular Physical Activity n (%) | Yes | 160 (47.4) | 325 (49.0) | 0.65 |
| Chronic medication n (%) | Yes | 115 (34.1) | 212 (32.0) | 0.49 |
| Self reported diagnosis n (%) | Knee OA | 38 (11.3) | 87 (13.1) | 0.40 |
| Other rheumatic disease | 12 (3.6) | 26 (3.9) | 0.78 | |
| Depression | 90 (26.7) | 183 (27.6) | 0.76 | |
| Other chronic disease | 130 (38.6) | 240 (36.2) | 0.46 | |
| Height (cm) Median (25th–75th percentile) | 161 (155.1-168.3) | 160.8 (154.0-168.0) | 0.42 | |
| Weight (kg) Median (25th–75th percentile) | 69.8 (61.2-79.1) | 69.7 (60.0-79.0) | 0.73 | |
| Body mass index (kg/m 2) n (%) | < 25.0 kg/m2 | 118 (35.0) | 222 (33.5) | 0.81 |
| 25.0-29.9 kg/m2 | 152 (45.1) | 314 (45.8) | ||
| ≥30.0 kg/m2 | 67 (19.9) | 137 (20.7) | ||
| Knee Pain (“ever”) | Yes | 133 (39.5) | 280 (42.2) | 0.40 |
| BDI score Median (25th–75th percentile) | 6 (3–12) | 7 (3–12) | 0.59 | |
