Children Living near a Sanitary Landfill Have Increased Breath Methane and Methanobrevibacter smithii in Their Intestinal Microbiota

Table 1

Socioeconomic and environmental conditions of children living in the three distinct areas.

	Slum near landfill group		Slum away from the landfill group		High socioeconomic group
		%		%		%
Brick house	69^a	63.4%	11^b	31.4%	32^c	100.0%	<0.001
Sewage network	10^a	9.2%	4^a	11.4%	32^b	100.0%	<0.001
Piped water	60^a	55.5%	23^a	65.7%	32^b	100.0%	<0.001
Regularized electricity	70^a	64.9%	1^b	2.9%	32^c	100.0%	<0.001
Paved street	14^a	13.0%	0^a	0.0%	32^b	100.0%	<0.001
Backyard of land	39^a	36.1%	15^a	42.9%	0^b	0.0%	<0.001
Pets	52^a	48.1%	8^b	22.9%	18^a	46.1%	0.019
Income per capita >1/2 MW	22^a	20.4%	2^a	5.7%	32^b	100.0%	<0.001
Social class
A	0^a	0.0%	0^a	0.0%	9^b	26.5%
B	4^a	3.7%	0^a	0.0%	20^b	58.8%
C	67^a	62.0%	17^a	48.6%	5^b	14.7%	<0.001
D	31^a	28.7%	18^a	51.4%	0^b	0.0%
E	6^a	5.6%	0^a	0.0%	0^b	0.0%

Chi-squared test: different letters on the line represent statistically significant differences ( < 0.05); MW = minimum wage.