Father's occupational exposure to carcinogenic agents and childhood acute leukemia: a new method to assess exposure (a case-control study)

Table 3 Paternal level of occupational exposure to carcinogenic in the life of the indexed child.

Variables^a	Cases (N = 193)		Controls (N = 193)		Crude OR [95% CI]	Adjusted^b OR [95% CI]
	N	%	N	%
At least one occupation with high exposure before conception of indexed child	45	23.3	28	14.5	1.79 [1.06,3.02]	1.69 [0.98,2.92]
At least one occupation with high exposure during pregnancy period of indexed child	42	21.8	26	13.5	1.79 [1.05,3.06]	1.98 [1.13,3.45]
At least one occupation with high exposure during breastfeeding period of indexed child	39	20.2	22	11.4	1.97 [1.12,3.47]	2.11 [1.17,3.78]
At least one occupation with high exposure after birth of indexed child	54	28.0	29	15.0	2.20 [1.33,3.64]	2.17 [1.28,3.66]
At least one occupation with high global exposure, considering all four periods	62	32.1	35	18.1	2.14 [1.33,3.44]	2.06 [1.24,3.42]

OR, odds ratio; CI, confidence interval
^aOnly "highly exposed" father's values are reported; values taken as a reference and which correspond to the "non-highly exposed" fathers are not shown.
^bThis analysis was adjusted by age, sex, source institution, level of crowding, paternal cigarette smoking, exposures at home, and mother's occupation.

ISSN: 1471-2407