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Association between emotional health (SFMCS) and pre-THA/TKA pain/function among US (FORCE) and Swiss (Geneva) patients. Lower scores represent greater pain/poorer emotional health. a. association pre-TKA WOMAC pain; b. pre-THA WOMAC pain; c. pre-TKA WOMAC function; d. pre-THA WOMAC function. No statisticial difference between countries was detected for TKA or THA in the association between education and pain and function
