Table 3.

Relative risk for selected cancers by cumulative exposure scores for alachlor and atrazine.

	Alachlor		Atrazine
Cancer and Exposure Quartiles	No. Cases	OR (95% CI)	No. Cases	OR (95% CI)
All cancer
1 - Lowest	189	1.0	340	1.0
2	188	1.37 (1.09–1.74)	338	0.97 (0.80–1.18)
3	188	1.42 (1.11–1.82)	338	0.96 (0.79–1.19)
4 - Highest	189	1.11 (0.84–1.46)	339	0.88 (0.71–1.11)
P for trend		0.39		0.28
Leukemia
1 - Lowest	7	1.0	7	1.0
2	7	0.99 (0.27–3.58)	7	1.64 (0.63–4.25)
3	3	0.85 (0.19–3.73)	16	0.41 (0.11–1.49)
4 - Highest	9	2.83 (0.74–10.9)	11	0.56 (0.17–1.86)
P for trend		0.17		0.11
Multiple myeloma
1 - Lowest	3	1.0	6	1.0
2	2	2.22 (0.29–16.9)	2	0.71 (0.12–4.30)
3	1	1.12 (0.09–14.4)	7	1.85 (0.42–8.24)
4 - Highest	5	5.66 (0.70–45.7)	8	2.17 (0.45–10.3)
P for trend		0.13		0.21
Non-Hodgkin’s lymphoma
1 - Lowest	5	1.0	17	1.0
2	3	0.62 (0.11–3.44)	16	0.88 (0.35–2.27)
3	10	2.40 (0.65–8.82)	15	1.36 (0.56–3.28)
4 - Highest	9	1.40 (0.32–6.11)	20	1.75 (0.73–4.20)
P for trend		0.42		0.14
Bladder
1 - Lowest	4	1.0	10	1.0
2	8	3.11 (0.79–12.3)	14	1.21 (0.39–3.73)
3	10	3.64 (0.89–14.8)	12	1.01 (0.31–3.29)
4 - Highest	7	2.03 (0.41–10.0)	11	0.85 (0.24–2.94)
P for trend		0.44		0.71
Colon
1 - Lowest	14	1.0	30	1.0
2	12	1.36 (0.56–3.34)	24	0.65 (0.33–1.28)
3	16	1.85 (0.76–4.50)	21	0.61 (0.30–1.25)
4 - Highest	17	1.14 (0.40–3.23)	33	0.86 (0.43–1.73)
P for trend		0.64		0.64
Prostate
1 - Lowest	78	1.0	143	1.0
2	80	1.26 (0.88–1.78)	143	1.03 (0.76–1.41)
3	80	1.20 (0.82–1.74)	132	0.86 (0.62–1.20)
4 - Highest	63	0.74 (0.48–1.15)	134	0.89 (0.63–1.25)
P for trend		0.26		0.35