Figure 1From: Profiling quality of care for patients with chronic headache in three different German hospitals – a case studyEffect sizes adjusted for covariates for differences between baseline and 6 month follow-up query; dark grey: Hospital A, grey: Hospital B, white: Hospital C (effect sizes below 0.4 indicate small effects, between 0.4 and 0.8 moderate effects and greater than 0.8 large effects).Back to article page