Association between weekday of surgery and length of hospital stay among patients undergoing primary total knee arthroplasty in Singapore: a secondary analysis based on a retrospective cohort study.

Stratified analyses Subgroup analyses revealed a marginally significant interaction for sex ( P = 0.063), with male patients demonstrating a stronger negative association (β = − 0.24, 95% CI: − 0.50–0.02) than females did (β = −0 .06, 95% CI: − 0.16–0.05), suggesting a potential trend toward heightened sensitivity of male patients to temporal variations in surgical scheduling.

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