Fig. 2From: Explaining regional variation in elective hip and knee arthroplasties in Finland 2010 − 2017—a register-based cohort studyHospital district variation of elective total hip (THA) and knee (TKA) arthroplasties controlling for age and gender only (Null model) in 2010 − 2013 and 2014 − 2017. Striped areas have incidence rate rations (IRR) over the country averageBack to article page