LEP patients had longer length of hospitalization than EP (2.79 vs 2.29 days) after knee arthroplasty

Description #

LEP patients had a significantly longer length of hospitalization than EP patients after total knee arthroplasty (2.79 ± 2.63 days vs 2.29 ± 1.82 days, p < 0.001) (Table 1). This is a secondary (baseline) perioperative characteristic reported in the cohort, consistent with prior arthroplasty literature on LEP and length of stay.

"Postoperatively, LEP patients, relative to EP patients, had a longer length of hospitalization (2.79 ± 2.63 days vs. 2.29 ± 1.82 days, p < 0.001) and were less likely to be discharged home (72.0% vs 82.4%, p = 0.001) (Table 1)." (Nguyen et al., 2022, p. 2)

Methods Context #

What? #ⓘ

The observable: total length of hospitalization (days).

"Perioperative and postoperative variables included preoperative pain level, 1-h postoperative pain level, total length of hospitalization, and discharge disposition." (Nguyen et al., 2022, p. 2)

How? #ⓘ

Two-sample t-test comparing mean length of stay between EP and LEP groups within the retrospective EHR cohort.

"Bivariate analyses comparing EP and LEP patient characteristics were performed using a t-test for continuous variables and Fisher's exact test for categorical variables." (Nguyen et al., 2022, p. 2)

Who? #ⓘ

2148 adults (≥18 years) who underwent TKA at a single academic medical center between 2015 and 2019; 9.8% (211) were classified as LEP.

"A total of 2148 patients underwent TKA between January 2015 and December 2019. Overall, 9.8% (211) of these patients were classified as having LEP." (Nguyen et al., 2022, p. 2)

Other Notes #

Longer LEP length of stay was itself associated with lower 0–30-day refill odds in the adjusted model (OR 0.91 per day), one of the perioperative factors examined alongside language.

Caveats #

• Single-center single-service retrospective cohort with race excluded for collinearity (Nguyen TKA opioid study) The findings come from a retrospective observational cohort at a single academic medical center, all discharged from the same surgical service — which limits generalizability and cannot establish causation for the LEP–refill association. The study collected no qualitative data from patients or providers to elucidate the mechanisms behind the disparity. Additionally, race/ethnicity was excluded from the multivariable model because of high collinearity with LEP status [Inferred: this means the independent effects of language versus race/ethnicity cannot be disentangled in the adjusted analysis], so residual confounding by the closely related dimensions of race, ethnicity, and socioeconomic status cannot be ruled out.