Table 1 Baseline population characteristics of participants eligible for data analyses
Variable | N (%) | Mean (SD) |
|---|---|---|
Participants | 4278 (100.0) | |
Age, years | 61.1 (9.2) | |
45–54 | 1264 (29.5) | |
55–64 | 1393 (32.6) | |
> 65 | 1621 (37.9) | |
Gender | ||
Male | 1782 (41.7) | |
Female | 2496 (58.3) | |
Race | ||
White or Caucasian | 3458 (80.8) | |
Other | 820 (19.2) | |
Educationa | ||
Tertiary | 1336 (31.2) | |
Secondary | 1277 (29.9) | |
None / Primary | 1665 (38.9) | |
Living status (number of persons) | 1.3 (1.1) | |
Live alone | 928 (21.7) | |
Living with someone else | 3350 (78.3) | |
BMI, kg/m2 | 28.5 (4.8) | |
< 25 | 1040 (24.3) | |
25 to < 30 | 1690 (39.5) | |
30 to < 35 | 1122 (26.2) | |
≥35 | 426 (10.0) | |
Comorbidities | 0.4 (0.8) | |
score 0 | 3254 (76.1) | |
score > 0 | 1024 (23.9) | |
Physical activity, PASEb | 162.1 (81.8) | |
238–580 | 798 (18.7) | |
176–237 | 853 (19.9) | |
135–175 | 866 (20.2) | |
91–134 | 871 (20.4) | |
0–90 | 890 (20.8) | |
Smoking status | ||
Never | 1977 (46.2) | |
Former | 1908 (44.6) | |
Current | 393 (9.2) | |
Knee injuries | ||
No | 2424 (56.7) | |
Yes | 1854 (43.3) | |
Knee surgical history | ||
No | 3341 (78.1) | |
Yes | 937 (21.9) | |
Disutility (SF-6D) score | −0.199 (0.120) | |