A comparison of predictors and intensity of acute postsurgical pain in patients undergoing total hip and knee arthroplasty.

In the final THA model, with a total explained variance of 29.4%, pre-surgical pain was the only variable approaching significance ( t [57]=1.746, β=0.254, p =0.086).

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In the final TKA predictive model, optimism was the only predictor of pain ( t [51]=−2.518, β=−0.339, p =0.015), with emotional representation ( t [51]=1.895, β=0.254, p =0.064) presenting a trend toward significance.

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Nevertheless, in the final predictive model, sex was no longer significant and presurgical pain only retained marginal significance, thus needing to be revisited in further studies, possibly with larger samples, which would increase power and the likelihood of finding significant effects.

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