Table 1.

Baseline Characteristics of Study Population, n = 1,276

Variable	n (%) | Median (IQR)	n (%) Missing	Outpatient Discharge	Overnight Admission	P Value
Demographics and Intraoperative Variables			n = 1167	n = 109
Age, years	43 (34-53)	30 (2.3)	43.5	47.8	.003
Sex		28 (2.2)			.115
Female	819 (64.2)		741 (63.5)	78 (71.6)
Male	457 (35.8)		426 (36.5)	31 (28.4)
ASA Class		31 (2.4)			.001
1: No disturbance	269 (21.1)		259 (22.2)	10 (9.2)
2: Mild disturbance	761 (59.6)		696 (59.6)	65 (59.6)
3: Severe disturbance	244 (19.1)		210 (18)	34 (31.2)
4: Life threatening	2 (0.2)		2 (.2)	0
Body mass index	27.5 (24.2-31.5)	35 (2.7)	28.3	29.9	.005
Dependent functional status	49 (3.8)	28 (2.2)	46 (3.9)	3 (2.8)	.721
Dyspnea	27 (2.1)		22 (1.9)	5 (4.6)	.127
Anesthesia		28 (2.2)			1.000
General	1226 (96.1)		1121 (96.1)	105 (96.3)
Spinal	50 (3.9)		46 (3.9)	4 (3.7)
Operative time, minutes	80 (56-109)	28 (2.2)	86.1	94.4	.063
Comorbidities
Diabetes	84 (6.6)	28 (2.2)	75 (6.4)	9 (8.3)	.593
Smoke	248 (19.4)	28 (2.2)	221 (18.9)	27 (24.8)	.179
Chronic obstructive pulmonary disease	24 (1.9)	28 (2.2)	19 (1.6)	5 (4.6)	.071
Medicated hypertension	306 (24.0)	28 (2.2)	266 (22.8)	40 (36.7)	.002
Chronic steroid use	35 (2.7)		34 (2.9)	1 (0.9)	.361
Coagulopathy	10 (0.8)		7 (0.6)	3 (2.8)	.062
Preoperative laboratory values
Leukocyte count	6.7 (5.7-7.81)	238 (18.7)	6.6 (5.7-7.8)	6.9 (5.5-8.2)	.093
Platelet	240.1 (212-270)	238 (18.7)	241 (212-269)	236 (207-284)	.058
Hematocrit	41 (39.3-43.6)	199 (15.6)	41 (39.3-43.7)	41 (39-43.1)	.075
Sodium	139.6 (138.8-141)	409 (32.1)	139.51 (138.8-141)	140 (138.86-141)	.145
Overnight admission
Yes	109 (8.5)
No	1167 (91.5)