Figure 4
Forest plot of psychological sleep interventions for headache intensity in adults. Note: Exact P values were not provided by Ruff et al., therefore a two-tailed test with p = 0.049 was imputed for results reported as p < 0.05, and p = 0.051 for tests reported as non-significant. In the forest plot, square icons indicate individual studies. Diamond icons represent studies pooled together by intervention type, and the overall effect of all studies pooled together.
