Additional potential modifiers will be analyzed using exploratory techniques, as described in section 2.15, secondary research question 3: sex, family income, language of intervention, physical function (PCS), multimorbidity, chronic pain, severity of depression symptoms (PHQ-9 score), comorbid anxiety, alcohol abuse, level of activation; level of self-efficacy; type of primary care clinic; FP involvement in study; date of randomization, and time elapsed between screening and randomization.