Table 3
The mean time to event and Hazard Ratio of a new low back pain episode, mean length of consecutive pain-free periods and total number of pain-free weeks
| Variable (95% CI) | All participants (n = 250) | AC (n = 80) | ID (n = 50) | DYS (n = 73) | ||
|---|---|---|---|---|---|---|
| Hazard ratio (MC/Control), HR | 1.1 (0.9, 1.5) | 1.3 (0.8, 2.1) | 1.5 (0.8, 2.7) | 0.8 (0.5, 1.2) | ||
| Time to event, number of weeks to first relapse (single event), mean | MC | 15.0 (12.6, 17.4) | 16.7 (12.0, 21.5) | 11.5 (7.9, 15.1) | 13.8 (10.3, 17.2) | |
| Control | 16.3 (13.4, 19.2) | 20.2 (14.4, 26.0 | 15.8 (10.3, 21.4) | 11.4 (7.3, 15.5) | ||
| Difference | −1.3 (−5.2, 2.5) | −3.4 (− 11.1, 4.3) | −4.3 (− 11.0, 2.4) | 2.4 (− 3.1, 7.9) | ||
| Total number of pain-free weeks during entire study period (between all events), mean. | MC | 33.5 (30.1, 36.9) | 32.9 (28.4, 37.4) | 30.3 (17.9, 42.6) | 37.3 (33.0, 41.6) | |
| Control | 30.9 (28.0, 33.7) | 34.8 (29.5, 40.1) | 29.2 (23.0, 35.4) | 27.4 (22.4, 32.4) | ||
| Difference | 2.6 (−1.8, 7.0) | −1.9 (−8.7, 4.9) | 1.0 (− 13.2, 15.3) | 9.8 (3.3, 16.3) | ||
| Length of pain-free periods (weeks between all events), mean | MC | 16.4 (14.1, 18.7) | 18.3 (13.6, 22.9) | 12.4 (8.0, 17.0) | 16.1 (12.7, 19.6) | |
| Control | 17.2 (14.5, 20.0) | 21.4 (15.9, 26.9) | 15.6 (9.9, 21.3) | 12.3 (8.6, 16.1) | ||
| Difference | −0.8 (−4.4, 2.8) | −3.1 (−10.2, 4.0) | 3.1 (− 10.1, 3.9) | 3.8 (− 1.2, 8.8) |