Micronucleus frequency in children exposed to biomass burning in the Brazilian Legal Amazon region: a control case study

Table 2 Micronucleus frequency of exfoliated buccal cells in children.

Micronucleus Frequency (MN‰)	Chapada dos Guimarães (CH)			Tangará da Serra (TS)			Porto Velho (PV)
	N	Mean	SD	N	Mean	SD	N	Mean	SD
By site	128	0.29	± 0.41	245	1.43 **	± 0.84	201	1.13 **	± 0.63
Others
parameters:
Type of school
Private school	57	0.27	± 0.36	42	1.30 **	± 0.40	-	-	-
Public school	71	0.30	± 0.44	203	1.46 **	± 0.90	201	1.13 **	± 0.63
Gender
Male	54	0.27	± 0.36	110	1.50 **	± 0.82	108	1.08 **	± 0.61
Female	74	0.30	± 0.44	135	1.39 **	± 0.85	93	1.18 **	± 0.65
Age (years)
≤ 7	18	0.19	± 0.31	46	1.20 **	± 0.83	14	0.89	± 0.56
8-9	28	0.29	± 0.46	55	1.33 **	± 0.87	27	1.06 *	± 0.54
10-11	28	0.27	± 0.40	59	1.57 **	± 0.83	32	1.11 **	± 0.74
12-13	27	0.31	± 0.40	57	1.54 **	± 0.92	49	1.10 **	± 0.69
≥ 14	27	0.35	± 0.43	28	1.54 **	± 0.51	79	1.22 **	± 0.58

*p < 0.05 and **p < 0.01 by Tukey's test. N = Number of children examined. SD = Standard Deviation.

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