Skip to main content

Table 4 Risk of neurological conditions among active duty DWH-CG Cohort responders reporting exposure to oil only (N=1351), both crude oil and dispersant (N=448) vs. neither exposure (N=1283), 2010-2015

From: Risk of longer-term neurological conditions in the Deepwater Horizon Oil Spill Coast Guard Cohort Study – Five years of follow-up

Condition (ICD-9 code)

N

Person Years

HRa (95% CI)

p-trend

Migraine (346)

 Neither

36

5595

1.00

 

 Oil only

39

5886

1.12 (0.71-1.78)

 

 Both

19

1939

1.74 (0.99-3.05)

0.08

Migraine, unspecified (346.9)

 Neither

32

5641

1.00

 

 Oil only

33

5930

1.07 (0.65-1.75)

 

 Both

15

1960

1.55 (0.83-2.89)

0.22

Migraine excl. menstrual migraine and persistent migraine aura with cerebral infarction

(346.1-346.3, 346.5, 346.7-346.9)

 Neither

32

5614

1.00

 

 Oil only

40

5898

1.29 (0.80-2.06)

 

 Both

16

1948

1.63 (0.89-2.99)

0.10

Headache (784.0)

    

 Neither

54

5492

1.00

 

 Oil only

62

5796

1.12 (0.77-1.62)

 

 Both

29

1920

1.63 (1.03-2.57)

0.06

Headaches/migraines combined (339, 346, 784.0)

 Neither

83

5327

1.00

 

 Oil only

97

5580

1.20 (0.89-1.62)

 

 Both

44

1850

1.69 (1.17-2.45)

0.008

Headaches/migraines combined excl. menstrual migraine and persistent migraine aura with cerebral infarction

(339, 346.1-346.3, 346.5, 346.7-346.9, 784.0)

 Neither

81

5336

1.00

 

 Oil only

98

5593

1.25 (0.93-1.68)

 

 Both

43

1852

1.70 (1.17-2.47)

0.006

Mononeuritis of upper limb and mononeuritis multiplex (354)

 Neither

19

5723

1.00

 

 Oil only

28

6010

1.61 (0.89-2.91)

 

 Both

14

2007

2.71 (1.34-5.49)

0.006

Hearing loss (389)

 Neither

64

5560

1.00

 

 Oil only

64

5814

1.02 (0.72-1.45)

 

 Both

25

1970

1.23 (0.77-1.97)

0.46

Tinnitus (388.3)

 Neither

22

5709

1.00

 

 Oil only

36

6060

1.65 (0.96-2.82)

 

 Both

15

2002

2.22 (1.14-4.31)

0.01

Disturbance of skin sensation (782.0)

 Neither

36

5645

1.00

 

 Oil only

39

5997

1.01 (0.64-1.59)

 

 Both

11

2004

0.89 (0.45-1.75)

0.79

  1. aModels adjusted for age, sex, race, and smoking; Bold indicative of statistical significance