Table 4.

Risk of colorectal cancer associated with organochlorine body burden.

	Controls No. (%)	Cases No. (%)	OR (95% CI)	p-Valuea
p,p′-DDE
Low	31 (41)	38 (29)	1.00	0.19
Medium	21 (28)	49 (37)	2.17 (1.03–4.54)
High	24 (32)	45 (34)	1.60 (0.79–3.25)
p,p′-DDT
Low	25 (33)	44 (33)	1.00	0.12
Medium	18 (24)	52 (39)	1.58 (0.74–3.36)
High	33 (43)	36 (27)	0.56 (0.27–1.17)
HCB
Low	29 (38)	40 (30)	1.00	0.23
Medium	22 (29)	47 (36)	1.72 (0.83–3.54)
High	25 (33)	45 (34)	1.60 (0.62–4.15)
α-HCH
Low	33 (43)	48 (36)	1.00	0.081
Medium	27 (36)	37 (28)	0.99 (0.49–1.98)
High	16 (21)	47 (36)	2.02 (0.95–4.29)
β-HCH
Low	26 (34)	44 (33)	1.00	0.81
Medium	23 (30)	45 (34)	1.14 (0.55–2.36)
High	27 (36)	43 (33)	0.88 (0.39–2.02)
γ-HCH
< LOD	30 (39)	61 (46)	1.00	0.28
Medium	22 (29)	36 (27)	0.79 (0.38–1.61)
High	24 (32)	35 (27)	0.69 (0.34–1.38)
PCB-28
< LOD	65 (86)	91 (69)	1.00	0.006
> LOD	11 (14)	41 (31)	2.75 (1.29–5.83)
PCB-118
< LOD	36 (47)	43 (33)	1.00	0.045
Medium	20 (26)	39 (30)	1.63 (0.80–3.31)
High	20 (26)	50 (38)	2.02 (1.00–4.08)
PCB-52
< LOD	69 (91)	120 (91)	1.00	0.77
> LOD	7 (9)	12 (9)	1.16 (0.42–3.19)
PCB-153
Low	30 (39)	39 (30)	1.00	0.57
Medium	22 (29)	48 (36)	1.50 (0.74–3.07)
High	24 (32)	45 (34)	1.22 (0.59–2.52)
PCB-138
Low	26 (34)	43 (33)	1.00	0.79
Medium	26 (34)	44 (33)	0.85 (0.41–1.75)
High	24 (32)	45 (34)	0.90 (0.43–1.90)
PCB-180
Low	29 (38)	41 (31)	1.00	0.63
Medium	24 (32)	44 (33)	1.20 (0.59–2.42)
High	23 (30)	47 (36)	1.19 (0.57–2.49)

^ap-Value for trend adjusted for age, sex, energy intake, and BMI.