Table 3.

Index Case and Household Characteristics by Whether Households Had Carbapenemase-Producing Enterobacterales–Colonized Household Contacts

Characteristic	Households With No CPE-Colonized Household Contacts (n = 79)	Households With at Least 1 CPE-Colonized Household Contacts (n = 16)	P Value
Index case characteristics
Female sex, n (%)	33 (42)	4 (25)	.2
Age, median (IQR), years	71 (46–77)	70 (55–78)	.7
Charlson score of 3 or greater, n (%)	21 (27)	5 (31)	.7
Receipt of antibiotics in prior 6 months, n (%)	70 (89)	12 (75)	.2
Index case remaining CPE-colonized at enrollment, n (%)	47 (60)	14 (88)	.04
Travel in prior year (with/without hospitalization), n (%)
Indian subcontinent	53 (67)	15 (94)	.07
Other countries (except United States/Northern Europe)	10 (13)	1 (6)
None or United States/Northern Europe	16 (20)	0 (0)
Hospitalization in prior year, n (%)
Outside Canada	50 (63)	9 (56)	.6
In Canada	21 (27)	4 (24)
None	8 (10)	3 (19)
CPE species, n (%)
Escherichia coli	51 (65)	10 (63)	.7
Klebsiella pneumoniae	19 (24)	5 (31)
Other	9 (11)	1 (6)
Carbapenemase produced, n (%)
NDM	47 (59)	8 (50)	.6
OXA-48–like	21 (27)	7 (44)
NDM/OXA-48–like	4 (5)	1 (6)
KPC	5 (6)	0 (0)
VIM	2 (3)	0 (0)
Household characteristics
Prestudy exposure to index case, median (IQR), days	97 (51–225)	86 (52–202)	.9
2 or more participating household contacts, n (%)	28 (35)	5 (31)	.7

Abbreviations: CPE, carbapenemase-producing Enterobacterales; IQR, interquartile range.