Table 4 Descriptive patient characteristics
Baseline characteristic | Denmark (n = 394) | Alberta (n = 131) |
|---|---|---|
Sex, n (% female) | 266 (69%) | 73 (65%) |
Missing values, n | 9 | 19 |
Age, mean (std. deviation) | 58.3 (13.0) | 55.9 (14.0) |
Missing values, n | 7 | 19 |
Pain duration, n (%) | ||
0–4 weeks | 30 (8.0%) | 17 (15.3%) |
4–12 weeks | 41 (10.9%) | 9 (8.1%) |
3–12 months | 87 (23.1%) | 18 (16.2%) |
> 1 year | 218 (58.0%) | 67 (60.4%) |
Missing values, n | 18 | 20 |
Previous episodes, n (%) | ||
0–1 | 68 (17.8%) | 24 (21.4%) |
2–3 | 148 (39.0%) | 27 (24.11%) |
>3 | 164 (43.2%) | 61 (54.5%) |
Missing values, n | 14 | 19 |
Backpain baseline (NRS), median (25th − 75th) | 5 (4–7) | 5 (3–7) |
Missing values, n | 16 | 19 |
ODI sum baseline, median (25th − 75th) | 24 (16–34) | 13 (9–17) |
Missing values, n | 27 | 48 |