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Secondary outcome of medication overuse headache.
| Before matching | After matching | |||
|---|---|---|---|---|
| SMT | Non‐SMT | SMT | Non‐SMT | |
| Number of patients | 3118 | 141,039 | 3116 | 3116 |
| MOH, n | 16 | 1068 | 16 | 36 |
| MOH, % (95% CI) | 0.5 (0.3–0.8) | 0.8 (0.7–0.8) | 0.5 (0.3–0.8) | 1.2 (0.8–1.5) |
| RR (95% CI) | 0.68 (0.41–1.11; p < 0.1186) | (Reference) | 0.44 (0.25‐0.80; p < 0.001) | (Reference) |
Abbreviations: 95% CI, 95% confidence intervals; MOH, medication overuse headache; RR, risk ratio; SMT, spinal manipulative therapy.
