TABLE 1.

Cohort demographic and clinical characteristics by antibiotic susceptibility

Characteristic	Valuea for:
	All (n = 6366)	Cefazolin		Cefepime		Ceftriaxone		Ciprofloxacin		Piperacillin-tazobactam
		S (n = 3,100)	R (n = 3,265)	S (n = 4,110)	R (n = 2,249)	S (n = 3,575)	R (n = 2,471)	S (n = 3,064)	R (n = 3,300)	S (n = 5,219)	R (n = 1,144)
Age	61.9 (17.8)	60.7 (18.8)	63.0 (16.7)	61.4 (18.4)	62.7 (16.6)	61.1 (18.6)	62.9 (16.5)	61.1 (8.7)	62.6 (16.9)	62.0 (18)	61.5 (16.6)
Sex
Female	4,272 (67.1)	2,354 (55.12)	1,917 (44.88)	2,942 (68.93)	1,326 (31.07)	2,666 (62.95)	1,569 (37.05)	2,266 (53.04)	2,006 (46.96)	3,585 (83.96)	685 (16.04)
Male	2,094 (32.9)	746 (35.63)	1,348 (64.37)	1,168 (55.86)	923 (44.14)	909 (43.68)	1,172 (56.32)	798 (38.15)	1,294 (61.85)	1,634 (78.07)	459 (21.93)
Race
White	4,619 (72.6)	2,135 (46.23)	2,483 (53.77)	2,878 (62.38)	1,736 (37.62)	2,474 (53.95)	2,112 (46.05)	2,136 (46.26)	2,481 (53.74)	3,772 (71.68)	846 (18.32)
Black	1,497 (23.5)	833 (55.64)	664 (44.36)	1,068 (71.44)	427 (28.56)	952 (64.24)	530 (35.76)	789 (52.71)	708 (47.29)	1,251 (83.68)	244 (16.32)
Other	250 (3.90)	132 (52.80)	118 (47.20)	164 (65.60)	86 (34.40)	149 (60.08)	99 (39.92)	139 (55.60)	111 (44.40)	196 (78.40)	54 (21.60)
History of smoking
Yes	3,688 (57.9)	1,808 (49.04)	1,879 (50.96)	2,378 (64.58)	1,304 (35.42)	2,075 (56.57)	1,593 (43.43)	1,753 (47.56)	1,933 (52.44)	3,020 (71.93)	666 (18.07)
No	2,678 (42.1)	1,292 (48.24)	1,386 (51.76)	1,732 (64.70)	945 (35.30)	1,500 (56.65)	1,148 (43.35)	1,311 (48.95)	1,367 (51.05)	2,199 (72.14)	478 (17.86)
Admission from:
Nursing home	514 (8.1)	185 (35.99)	329 (64.01)	285 (55.45)	229 (44.55)	225 (44.47)	281 (55.53)	189 (36.77)	325 (63.23)	368 (71.73)	145 (28.27)
Other	5,852 (91.90)	2,915 (49.82)	2,936 (50.18)	3,825 (65.44)	2,020 (34.56)	3,350 (57.66)	2,460 (42.34)	2,875 (49.15)	2,975 (50.85)	4,851 (82.92)	999 (17.08)

^aAge is given as mean (SD); other values are number (percent) of patients.