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Table 1 Characteristics of active duty members of the Deepwater Horizon Oil Spill Coast Guard (DWH-CG) Cohort

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

Characteristic

Non-responders

(N=39260)

Responders

(N =5964)

Responders with survey data

(N =3492)

Responders with no survey data

(N = 2472)

Age (years)

 Mean (SD)

30.3 (8.2)

30.7 (7.6)

30.9 (7.6)

30.5 (7.6)

Sex, n (%)

 Male

33517 (85.4%)

5238 (87.8%)

3028 (86.7%)

2210 (89.4%)

 Female

5743 (14.6%)

726 (12.2%)

464 (13.3%)

262 (10.6%)

Race, n (%)

 White

30209 (76.9%)

4630 (77.6%)

2703 (77.4%)

1927 (78.0%)

 Black

2183 (5.6%)

304 (5.1%)

167 (4.8%)

137 (5.5%)

 Asian/AI/AN/NH/PI

1541 (3.9%)

240 (4.0%)

153 (4.4%)

87 (3.5%)

 Other

2111 (5.4%)

300 (5.0%)

178 (5.1%)

122 (4.9%)

 Unknown

3216 (8.2%)

490 (8.3%)

291 (8.3%)

199 (8.1%)

Military rank, n (%)

 Junior enlisted (E1-E5)

22191 (56.5%)

3020 (50.6%)

1696 (48.6%)

1324 (53.6%)

 Senior enlisted (E6-E10)

10106 (25.7%)

1454 (24.4%)

868 (24.9%)

586 (23.7%)

 Officer (O1-O10, W2-W4)

6963 (17.8%)

1490 (25.0%)

928 (26.5%)

562 (22.7%)

Highest education, n (%)

 High school or less

27401 (69.8%)

3893 (65.3%)

2242 (64.2%)

1651 (66.8%)

 Some college or highera

10862 (27.7%)

1990 (33.4%)

1203 (34.5%)

787 (31.8%)

 Other or not indicated

997 (2.5%)

81 (1.3%)

47 (1.3%)

34 (1.4%)

Smoking status, n (%)

 Never

--

--

1888 (54.1%)

--

 Former

--

--

521 (14.9%)

--

 Current

--

--

786 (22.5%)

--

 Missing

--

--

297 (8.5%)

--

Follow-up time (years)

    

 Median

5.5

5.1

5.1

5.2

  1. aSome college or higher includes technical school, bachelors, masters, and doctoral degree
  2. Abbreviations AI American Indian, AN Alaska Native, NH Native Hawaiian, PI Pacific Islander