Table 1.

Median, minimum, maximum, 25% and 75% percentiles, values^* of endotoxin concentrations from each of the five locations sampled in each home when the infant was 1 and 6 months of age

Time (month)	Location	n†	Minimum	25%	Median (GM‡)	75%	Maximum
1	Child's bed	515	0.05	1.10	2.80 (2.55)	6.20	692.10
	Child's bedroom floor	268	0.05	5.75	13.65 (12.78)	31.85	500.60
	Living room floor	585	0.05	9.80	22.40 (20.36)	46.00	997.00
	Mother's bed	585	0.05	1.50	4.10 (3.54)	9.70	873.30
	Mother's bedroom floor	585	0.05	6.10	16.00 (14.48)	36.00	886.20
6	Child's bed	286	0.05	1.40	3.65 (3.62)	9.20	538.90
	Child's bedroom floor	216	0.20	4.60	12.80 (11.38)	29.15	312.90
	Living room floor	335	0.10	8.70	18.20 (17.00)	38.50	1195.50
	Mother's bed	335	0.05	1.30	3.50 (3.20)	8.30	143.20
	Mother's bedroom floor	335	0.05	5.40	13.30 (12.66)	30.50	1109.80

^*AII endotoxin values are given as EU/g of fine dust.

^†The number of homes with samples at each location. The numbers vary because of missing or inadequate samples and numbers for the child's bedroom floor are substantially smaller because there were 317 homes at one month and 119 at 6 months where the child was sleeping in the same room as the mother. The results for the floors when the child and mother are sleeping in the same room are grouped as the mother's bedroom floor.

^‡For easier comparison with some previous studies the geometric mean (GM) is given in addition to the median.