Table 1.

—Background Characteristics of Children in the Cohort

Characteristic	PBB Group (n = 104)	Control Group (n = 49)	P Valuea
Sex, male to female ratio, % male	72:32 (69)	33:16 (67)	.815
Age, mo (IQR), y	19 (12-30)	20 (8-63)	.967
Household tobacco smoke exposure	39 (38)	15 (33)	.565
Siblings, median (IQR)	1 (1-2)	1 (1-2)	.788
Childcare attendance	48 (91) (n = 53)	15 (58) (n = 26)	.001
Indigenous statusb	10 (10)	1 (2)	.106
Previous pneumonia	15 (14)	8 (16)	.659
Wheeze (ever)	63 (81) (n = 78)	12 (67) (n = 18)	.192

Data given as No. (%) unless otherwise indicated. IQR = interquartile range.

^aP < .05 considered statistically significant.

^bDefined as those who identified as aboriginal or Torres Strait Islander.