Table 1.

Patient demographics, primary analyses

	Powered staplers, n = 659	Manual staplers, n = 3100	Std. diff.a
Age, mean (SD)	66.1 (10.7)	66.7 (10.2)	0.059
Age group, n (%)
18–44	23 (3.5)	65 (2.1)	0.085
45–54	54 (8.2)	309 (10.0)	0.062
55–64	171 (25.9)	794 (25.6)	0.008
≥ 65	411 (62.4)	1932 (62.3)	0.001
Sex, n (%)
Female	353 (53.6)	1699 (54.8)	0.025
Male	306 (46.4)	1401 (45.2)
Marital status, n (%)
Married	397 (60.2)	1689 (54.5)	0.117
Single	251 (38.1)	1193 (38.5)	0.008
Other	11 (1.7)	218 (7.0)	0.265
Race, n (%)
White	571 (86.6)	2487 (80.2)	0.173
Black	51 (7.7)	230 (7.4)	0.012
Other	37 (5.6)	383 (12.4)	0.237
Hispanic, n (%)	93 (14.1)	114 (3.7)	0.373
Payer type, n (%)
Medicare	405 (61.5)	1921 (62.0)	0.011
Commercial	195 (29.6)	883 (28.5)	0.024
Medicaid	34 (5.2)	165 (5.3)	0.007
Other	25 (3.8)	131 (4.2)	0.022
Index hospitalization year
2012	14 (2.1)	823 (26.5)	0.743
2013	86 (13.1)	739 (23.8)	0.281
2014	145 (22.0)	614 (19.8)	0.054
2015	245 (37.2)	591 (19.1)	0.411
2016	169 (25.6)	333 (10.7)	0.393

SD standard deviation, Std. diff. standardized difference

^aStandardized difference > 0.10 indicates imbalance across the cohorts