Table II.

Mean levels of MDA–deoxyguanosine and bulky DNA adducts per 10⁸ normal nucleotides ± SE in the olfactory epithelium of schoolchildren resident near the Sarroch industrial estate and in a rural village according to age, gender and residence

	MDA–deoxyguanosine adducts					Bulky DNA adducts
	n	Mean ± SE	MR	CI	P value	n	Mean ± SE	MR	CI	P value
Age per unit	148	54.6±5.3	0.99	0.88–1.12	0.917	62	2.2±0.2	0.99	0.85–1.39	0.507
Gender
Girlsa	77	54.6±7.0	1	–	–	33	2.1±0.3	1	–	–
Boys	71	54.7±8.2	1.02	0.69–1.51	0.912	29	2.2. ± 0.4	1.06	0.69–1.64	0.781
Residence
Rural villagea	73	34.1±4.4	1	–	–	34	1.6±0.2	1	–	–
Sarroch	75	74.6±9.1	2.53	1.71–2.89	<0.001	28	2.9±0.4	1.90	1.25–2.89	0.003

^aReference levels.