Table 4.

Adjusted hazard ratios for age at onset of male breast cancer by exposure status (n = 444)

Exposure	Controls	Cases	Hazard Ratio	95 % Confidence Interval
Ever stationed at Camp Lejeune
No	248	41	1.00 (ref.)
Yes	125	30	1.51	0.78 - 2.95
Cumulative PCE
No exposure	357	67	1.00 (ref.)
Low (>0- < 36 ppb-months)	7	2	1.19	0.20 - 7.07
High (≥36 ppb-months)	8	2	2.08	0.31 - 14.00
Cumulative TCE
No exposure	258	46	1.00 (ref.)
Low (>0- <159 ppb-months)	57	13	1.13	0.49 - 2.62
High (≥159 ppb-months)	57	12	1.41	0.58 - 3.46
Cumulative benzene
No exposure	260	46	1.00 (ref.)
Low (>0- < 3.6 ppb-months)	57	15	1.95	0.93 - 4.10
High (≥3.6 ppb-months)	55	10	0.76	0.28 - 2.11
Cumulative DCE
No exposure	356	67	1.00 (ref.)
Low (>0- <472 ppb-months)	8	1	0.64	0.06 - 7.01
High (≥472 ppb-months)	8	3	2.72	0.52 - 14.18
Cumulative vinyl chloride
No exposure	356	67	1.00 (ref.)
Low (>0- <60 ppb-months)	8	2	1.17	0.20 - 6.89
High (≥60 ppb-months)	8	2	2.14	0.31 - 14.81
Cumulative TVOCa
No exposure	258	46	1.00 (ref.)
Low (>0- <168 ppb-months)	57	14	1.28	0.56 - 2.91
High (≥168 ppb-months)	57	11	1.21	0.48 - 3.04

^asum of the amount of exposure to PCE, TCE, benzene, DCE, and vinyl chloride