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

Table 3

Comparison of M. smithii concentrations in CFU/g of feces, in accordance with breath CH₄ production in the three distinct groups.

CH4 Producer	Slum near the landfill		Slum away from landfill		High socioeconomic group
		Concentration		Concentration		Concentration
Yes	59	4.26 × 10^7	11	1.42 × 10^7	7	1.26 × 10^7	0.094^1
		(1.41 × 10^7–1.46 × 10^8)		(7.97 × 10^6–7.39 × 10^8)		(5.32 × 10^5–3.94 × 10^7)
No	52	1.64 × 1	24	5.63 × 1	25	2.06 × 1	<0.00
		(2.83 × 10^6–5.42 × 10^7)		(6.13 × 10^4–2.97 × 10^6)		(3.11 × 10^4–2.59 × 10^6)
Total	111	3.16 × 1	35	2.05 × 1	32	3.93 × 1	<0.001^1
		(6.36 × 10^6–8.63 × 10^7)		(1.55 × 10^5–1.66 × 10^7)		(5.05 × 10^4–5.54 × 10^6)

One-way ANOVA complemented by Dunn’s Test, median and percentiles 25 and 75; Different letters in the same line represent statistically significant differences: < 0.05.