Table 4 Unadjusted mean difference from baseline to follow-up for outcomes by treatment group and recruitment method
From: Comparing recruitment strategies in a study of acupuncture for chronic back pain
| Â | Acupuncture | Usual care | Test for interaction of treatment group and recruitment method | ||||||
|---|---|---|---|---|---|---|---|---|---|
Follow-up Interval Outcome | Â | Mailed Letter | Magazine Advertisement | Â | Mailed Letter | Magazine Advertisement | Â | ||
| Â | Â | Mean | Â | Mean | Â | Mean | Â | Mean | Â |
| Â | N | (95% CI) | N | (95% CI) | N | (95% CI) | N | (95% CI) | Â |
8-week | Â | Â | Â | Â | Â | Â | Â | Â | Â |
Symptom bothersomeness | 144 | -1.8 (-2.3, -1.4) | 81 | -1.6 (-2.2, -1.0) | 41 | -0.8 (-1.5, -0.1) | 30 | -1.5 (-2.5, -.05) | 0.82 |
RMDQ | 144 | -3.8 (-4.7, -2.9) | 82 | -3.3 (-4.4, -2.1) | 41 | -0.9 (-2.3, +0.5) | 30 | -2.3 (-3.7, -1.0) | 0.99 |
26-week | Â | Â | Â | Â | Â | Â | Â | Â | Â |
Symptom bothersomeness | 143 | -1.3 (-1.8, -0.8) | 82 | -1.6 (-2.3, -1.0) | 40 | -1.4 (-2.2, -0.5) | 29 | -1.4 (-2.5, -0.3) | 0.30 |
RMDQ | 143 | -3.5 (-4.4, -2.5) | 82 | -3.8 (-4.8, -2.8) | 40 | -2.5 (-4.1, -1.0) | 29 | -2.5 (-4.2, -0.7) | 0.25 |
52-week | Â | Â | Â | Â | Â | Â | Â | Â | Â |
Symptom bothersomeness | 140 | -1.4 (-1.9, -0.9) | 80 | -1.8 (-2.4, -1.1) | 38 | -1.5 (-2.4, -0.6) | 30 | -1.3 (-2.2, -0.3) | 0.20 |
RMDQ | 140 | -3.5 (-4.4, -2.7) | 80 | -4.1 (-5.1, -3.1) | 38 | -3.2 (-4.7, -1.8) | 30 | -2.4 (-4.4, -0.4) | 0.17 |