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Table 3 Patient demographics and risk factors in short and standard LOS groups after propensity score matching

From: A propensity score-matched analysis comparing outpatient and short-stay hospitalization to standard inpatient hospitalization following total ankle arthroplasty

  LOS ≤ 1 day (n = 446) LOS > 1 day (n = 446) p
Revision TAA 10.5% (47/446) 11.7% (47/446) 0.594
Sex
 Male 52.2% (233/446) 52.2% (233/446) > 0.999
 Female 47.8% (213/446) 47.8% (213/446)  
Race/ethnicity
 Asian 0.9% (4/446) 0.4% (2/446) 0.686
 Black or African American 2.0% (9/446) 3.4% (15/446) 0.214
 Hispanic 2.5% (11/446) 2.5% (11/446) > 0.999
 White 84.1% (375/446) 65.7% (293/446) < 0.001*
 Other 0.2% (1/446) 0.4% (2/446) > 0.999
 Unknown/not reported 10.3% (46/446) 27.6% (123/446) < 0.001*
Age (years)
 Under 50 7.8% (35/446) 7.0% (31/446) 0.609
 Between 50 and 59 26.0% (116/446) 22.9% (102/446) 0.275
 Between 60 and 69 39.5% (176/446) 37.7% (168/446) 0.582
 Between 70 and 79 23.1% (103/446) 26.5% (118/446) 0.245
 80 and over 3.6% (16/446) 6.1% (27/446) 0.086
BMI (kg/m2)
 Underweight 0.4% (2/446) 1.1% (5/446) 0.451
 Normal 12.1% (54/446) 15.5% (69/446) 0.145
 Overweight 37.6% (168/446) 35.2% (157/446) 0.444
 Obese class I 26.5% (118/446) 27.4% (122/446) 0.763
 Obese class II 15.9% (71/446) 16.4% (73/446) 0.856
 Obese class III 7.4% (33/446) 4.5% (20/446) 0.066
Comorbidities
 Diabetes 9.6% (43/446) 9.6% (43/446) > 0.999
 Smoker 6.3% (28/446) 6.3% (28/446) > 0.999
 COPD 0.7% (3/446) 0.7% (3/446) > 0.999
 Congestive heart failure 0.0% (0/446) 0.0% (0/446) > 0.999
 Hypertension 52.7% (235/446) 52.7% (235/446) > 0.999
 Dialysis 0.0% (0/446) 0.0% (0/446) > 0.999
 Chronic steroid use 3.6% (16/446) 3.6% (16/446) > 0.999
ASA class
 Class 1 (no disturbance) 4.5% (20/446) 4.5% (20/446) > 0.999
 Class 2 (mild disturbance) 57.8% (258/446) 57.8% (258/446) > 0.999
 Class 3 (severe disturbance) 37.2% (166/446) 37.2% (166/446) > 0.999
 Class 4+ (life threatening) 0.4% (2/446) 0.4% (2/446) > 0.999
  1. * indicates statistical significance (p < 0.05)