Acute kidney injury after primary total hip arthroplasty: a risk multiplier for complication, mortality, and healthcare utilization

Table 3 Multivariable-adjusted association of AKI with healthcare utilization outcomes and in-hospital complications for index hospitalization for primary THA in the main model and sensitivity analysis

	Main Model^a	Sensitivity analyses^b: Main Model + hospital characteristics
	OR (95% CI)	OR (95% CI)
Total hospital charge above the median ^c	2.29 (1.99, 2.65)	2.25 (1.95, 2.60)
Discharge to an inpatient/rehabilitation facility^d	2.11 (2.02, 2.20)	2.15 (2.06, 2.25)
Length of hospital stay more than median (>3 days)^e	4.34 (4.16, 4.53)	4.39 (4.20, 4.58)
In-hospital complications^f
Infection	2.34 (1.87, 2.93)	2.33 (1.87, 2.91)
Transfusion	2.46 (2.37, 2.56)	2.52 (2.42, 2.61)
Revision	2.54 (2.16, 2.98)	2.56 (2.17, 3.01)
Death	8.52 (7.47, 9.73)	8.54 (7.48, 9.76)

BOLD indicates significant odds ratio
^aMain model was adjusted for socio-demographics (age, race/ethnicity, gender, income), the Deyo-Charlson comorbidity index, insurance payer and the underlying diagnosis for primary THA
^bSensitivity analyses adjusted each main model additionally for hospital characteristics including hospital location/teaching status, hospital region and hospital bed size
^cMedian hospital charges were calculated for each year
^dInpatient/rehabilitation facility included short- or long-term care hospital, skilled nursing facility (SNF), intermediate care facility, or a certified nursing facility
^eMedian length of hospital stay was 2.74 days, rounded off to 3 days
^fIn-hospital complications

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