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Table 1 Patient demographics and risk factors in short and standard LOS groups

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

  LOS ≤ 1 day (n = 562) LOS > 1 day (n = 579) p
Revision TAA 8.7% (49/562) 9.8% (57/579) 0.513
Sex
 Male 58.4% (328/562) 45.1% (261/579) < 0.001*
 Female 41.6% (234/562) 54.9% (318/579)  
Race/ethnicity
 Asian 0.9% (5/562) 0.3% (2/579) 0.281
 Black or African American 2.1% (12/562) 3.6% (21/579) 0.133
 Hispanic 2.7% (15/562) 2.9% (17/579) 0.785
 White 83.8% (471/562) 65.8% (381/579) < 0.001*
 Other 0.4% (2/562) 0.3% (2/579) > 0.999
Unknown/not reported 10.1% (57/562) 26.9% (156/579) < 0.001*
Age (years)
 Under 50 8.0% (45/562) 7.9% (46/579) 0.969
 Between 50 and 59 26.0% (146/562) 20.9% (121/579) 0.043*
 Between 60 and 69 38.8% (218/562) 38.5% (223/579) 0.924
 Between 70 and 79 23.8% (134/562) 26.8% (155/579) 0.256
 80 and over 3.4% (19/562) 5.9% (34/579) 0.046*
BMI (kg/m2)
 Underweight 0.5% (3/562) 1.0% (6/579) 0.507
 Normal 11.9% (67/562) 14.9% (86/579) 0.146
 Overweight 39.1% (220/562) 31.8% (184/579) 0.009*
 Obese class I 26.9% (151/562) 28.2% (163/579) 0.627
 Obese class II 14.6% (82/562) 16.9% (98/579) 0.279
 Obese class III 6.9% (39/562) 7.3% (42/579) 0.836
Comorbidities
 Diabetes 10.5% (59/562) 14.3% (83/579) 0.050*
 Smoker 10.0% (56/562) 6.2% (36/579) 0.020*
 COPD 2.3% (13/562) 2.4% (14/579) 0.907
 Congestive heart failure 0.2% (1/562) 0.2% (1/579) > 0.999
 Hypertension 55.0% (309/562) 56.1% (325/579) 0.696
 Dialysis 0.0% (0/562) 0.3% (2/579) 0.500
 Chronic steroid use 4.1% (23/562) 6.0% (35/579) 0.133
ASA class
 Class 1 (no disturbance) 6.0% (34/562) 3.4% (20/579) 0.039*
 Class 2 (mild disturbance) 60.5% (340/562) 51.6% (299/579) 0.003*
 Class 3 (severe disturbance) 32.2% (181/562) 43.4% (251/579) < 0.001*
 Class 4+ (life threatening) 1.3% (7/562) 1.6% (9/579) 0.657
  1. * indicates statistical significance (p < 0.05)