Predictors of Length of Stay in Patients Undergoing Total Knee Replacement Surgery

1Mercy Hospital, Scranton, PA

Meeting: Hospital Medicine 2011, May 10-13, Dallas, Texas.

Abstract number: 105

Background:

Very few studies have focused on patient characteristics that influence length of stay (LOS) after total knee arthroplasty (TKR). The primary goal of this retrospective study was to identify patient characteristics associated with LOS in TKR surgeries

Methods:

Between January 2008 and December 2009, 659 patients (442 female) with a mean age of 67.1 years (39–99 years) underwent knee replacement surgery at the Mercy Hospital Knee and Hip Institute. Retrospective chart review was done to identify patient characteristics associated with LOS, postoperative blood loss, and AKI after TKR. Linear regression analysis was used to identify significant parameters influencing LOS and postoperative blood loss. Logistic regression was used to evaluate AKI. The significance level was set at P < 0.05

Results:

Mean LOS after TKR was 3.27 days. AKI was the only factor associated with increased LOS. Compared with patients without AKI and controlling for age, sex, and angiotensin converting enzyme inhibitors/angiotensive receptor blocker (ACEI/ARB) use, LOS among patients with AKI was 0.23 days longer (P = 0.03). Diabetes was not associated with longer LOS. Mean postoperative hemoglobin loss was 2.6%. Increasing age was associated with increasing blood loss (P = 0.01), and diabetics has significantly less blood loss that nondiabetic patients (P = 0.04). AKI occurred in 20.8% of patients. AKI risk decreased between 2008 and 2009 (odds ratio, 0.55; 95% CI, 0.37–0.82) but increased with age (P < 0.001), Diabetes and ACEI use (OR, 1.6; 95% CI, 1.0–2.5; OR, 1.5; 95% CI, 1.0–2.3, respectively.) However, the effects of diabetes and ACEI use were not independent; when both were included in the regression model, neither was statistically significant, and both odds ratios were smaller

Conclusions:

In these data, age was associated with increased blood loss and risk of AKI. When examined separately, both diabetes and preoperative ACEI use increased the risk of AKI. However these factors were correlated and were not independent predictors of significantly increased risk. AKI was the only factor associated with a prolonged LOS.

Disclosures:

V. Sehgal ‐ Mercy Hospital, employer; V. Kresse ‐ Mercy Hospital, student; P. Reddy ‐ Mercy Hospital, student; V. Sharma ‐ Mercy Hospital, student; Slesko ‐Mercy Hospital, faculty; J. Eagan ‐ Mercy Hospital, faculty

To cite this abstract:

Sehgal V, Reddy P, Eagan J, Bansal P. Predictors of Length of Stay in Patients Undergoing Total Knee Replacement Surgery. Abstract published at Hospital Medicine 2011, May 10-13, Dallas, Texas. Abstract 105. Journal of Hospital Medicine. 2011; 6 (suppl 2). https://www.shmabstracts.com/abstract/predictors-of-length-of-stay-in-patients-undergoing-total-knee-replacement-surgery/. Accessed July 19, 2019.

« Back to Hospital Medicine 2011, May 10-13, Dallas, Texas.