Table 3
Primary outcome measure—Low back pain intensity
| Treatment group | Group difference | P value* | ||
|---|---|---|---|---|
| Chiropractic care | Integrated care | Chiropractic care minus integrated care | ||
| Low back pain intensity [0 to 10; 0 = no LBP, 10 = the worst LBP possible] | ||||
| Mean at baseline (SD) | 5.4 (1.5) | 5.1 (1.6) | ||
| Mean at week 4 (95%CI) | 4.5 (4.1 to 4.9) | 4.0 (3.7 to 4.4) | 0.42 (−0.02 to 0.86) | 0.07 |
| Mean at week 12 (95%CI) | 3.1 (2.7 to 3.4) | 2.7 (2.4 to 3.1) | 0.37 (−0.12 to 0.85) | 0.14 |
| Short term response summary (area under the curve minus baseline through week 12) | 0.41 (−0.02 to 0.85) | 0.06 | ||
| Mean at week 26 (95%CI) | 3.8 (3.4 to 4.2) | 3.4 (3 to 3.7) | 0.45 (−0.13 to 1.04) | 0.13 |
| Mean at week 52 (95%CI) | 3.7 (3.3 to 4) | 3.0 (2.7 to 3.4) | 0.62 (0.04 to 1.21) | 0.04 |
| Long term response summary (area under the curve minus baseline through week 52) | 0.46 (0.07 to 0.86) | 0.02 | ||
Mean values adjusted for baseline
*Long term response summary serves as the omnibus test p-value. If p > .05, p-values for short term response summary and individual time points are not computed