Fig. 2From: Association between osteoarthritis and unmet medical needs in Korea: limitations in activities as a mediatorDirect acyclic graph (DAG) showing the causal pathway of osteoarthritis effects and mediating effects of limitations in activities on unmet needs. Illustrative directed acyclic graph of the causal effect on unmet need. E exposure, O outcome, M mediator, C1 confounder in the natural direct effect, C2 confounder in the natural indirect effectBack to article page