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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