Fig. 1From: Pain rates in general population for the period 1991–2015 and 10-years prediction: results from a multi-continent age-period-cohort analysisObserved rate of pain in males and females by age, period and cohort. a: pain rates by age. b: pain rates by period. c: pain rate by cohort. Note. The dark central line indicates rate = 0.5Back to article page