Table V.

Comparison of willingness to undergo surgery again between responders and non-responders according to the Patient Acceptable Symptom State (PASS) score thresholds for total hip (THR) and total knee replacement (TKR). An odds ratio (OR) > 1 indicates a higher odds of willingness to undergo surgery again in responders compared with non-responders (CI, confidence interval)

Procedure	Crude OR (95% CI)	OR adjusted for age and gender* (95% CI)	OR adjusted for all potential confounders† (95% CI)
THR	7.64 (4.09 to 15.3)	6.97 (3.51 to 13.8)	8.53 (3.80 to 19.1)
TKR	7.28 (3.85 to 14.3)	7.92 (3.79 to 16.6)	7.73 (2.84 to 21.0)

* stratified by quartiles of follow-up length † adjusted for age, gender, body mass index, Charnley classification, indication (osteoarthritis vs other), pre-operative Short-Form 36 physical and mental component summaries, and stratified by quartiles of follow-up length