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Table 4 Adjusted hazard ratios for age at onset of male breast cancer by exposure status (n = 444)

From: Evaluation of contaminated drinking water and male breast cancer at Marine Corps Base Camp Lejeune, North Carolina: a case control study

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