Table 1. Table of patient demographics for cases (PBB) and controls.

	Cases	Controls
Number of subjects	24	20
Female	14	12
Blind brush	24	21
Non-blind brush	24	N/A
Age in years, mean (min, max)	4.3 (0.8, 13.7)	7.4 (1, 15.8)
Breastfed, count (min, max months)	9 (0.07, 12)	11 (0.5, 24)
Antibiotics, weeks since last dose (min, max)	1, 25	4, 53
Mother smokes	2	4
Father smokes	5	10
Both parents smoke	2	4
Mother sampled	11	5