Table 1.

Patient characteristics (unadjusted and using the propensity score for inverse probability weighting and matching).

Variable	General Anesthesia	Local Anesthesia	P value	Standardized Difference (Unadjusted)	Standardized Difference After Inverse Probability Weighting	Standardized Difference after Propensity Matching
	Total = 58,107 N (%)	Total = 13,723 N (%)
Age, Median (IQR)	60 (23)	66 (21)	<0.001	37.4	1.3	2.2
*Age (years)			<0.001
<55	22,432 (38.6)	3,469 (25.3)
55–64	13,715 (23.6)	3,013 (22.0)		3.9	0.2	0.4
65–74	12,816 (22.1)	3,617 (26.4)		10.1	0.22	0.06
75+	9,144 (15.7)	3,624 (26.4)		26.4	0.08	0.02
*Male gender	53,012 (91.2)	12,304 (89.7)	<0.001	5.4	0.1	7.2
*Race/Ethnicity			<0.001
Non-Hispanic Caucasian	37,776 (65.0)	10,341 (75.4)
Hispanic	3,801 (6.5)	543 (4.0)		8.7	0.02	5.3
African American	5,753 (9.9)	762 (5.6)		16.2	0.4	1.3
Other	1,763 (3.0)	448 (3.3)		1.3	0.2	4.1
Unknown	9,014 (15.5)	1,629 (11.9)		10.6	0.3	1.3
*Year of Surgery			<0.001
2014	9,844 (16.9)	2,680 (19.5)
2015	11,129 (19.2)	2,868 (20.9)		4.2	0.04	1.4
2016	12,429 (21.4)	3,050 (22.2)		3.9	0.3	0.8
2017	12,148 (20.9)	2,718 (19.8)		2.7	0.4	1.2
2018	12,557 (21.6)	2,407 (17.5)		14.7	0.7	1.1
Preoperative Functional Status			<0.001
Independent	57,359 (98.7)	13,358 (97.3)
Partially or Totally Dependent	317 (0.6)	115 (26.6)		1.8	0.3	0.8
American Society of Anesthesiology Score			<0.001
1	9,943 (17.1)	2,027 (14.8)
2	31,477 (54.2)	6,977 (50.8)		7.7	0.2	0.8
3–5	16,645 (28.7)	4,612 (33.6)		5.4	0.2	0.4
Predicted Morbidity Quintiles			<0.001
1	11,928 (20.5)	2,436 (17.8)
2	11,692 (20.1)	2,672 (19.5)		0.4	0.2	1.7
3	11,778 (20.3)	2,585 (18.8)		10.8	02	1.2
4	11,562 (19.9)	2,802 (20.4)		10.2	0.01	2.9
5	11,135 (19.2)	3,228 (23.5)		3.5	0.09	0.4
Number of comorbidities			0.1
0	25,932 (44.6)	6,095 (44.4)
1	21,906 (37.7)	5,105 (37.2)		10.5	0.1	1.5
2+	10,269 (17.7)	2,523 (18.4)		8.3	0.2	3.0

^*Indicates that the variable was included in the propensity analysis.