Figure 2.

Forest plots of meta-analysis data for headache intensity. (a) Forest plot of headache intensity in headache patients and controls; (b) subgroup analysis for headache intensity according to standard and non-standard MBSR; (c) subgroup analysis headache intensity with different types of headache. Effect sizes to the left of zero reflect greater mindfulness meditation-induced headache relief. Confidence intervals that do not include zero reflect significant differences. Summary statistics were computed via random effects meta-analysis.