Skip to main content

Table 5 Modification of the associations between oil spill exposures and nonfatal MI among workers and non-workers by smoking status. GuLF STUDY, 2010–2013

From: Deepwater Horizon oil spill exposures and nonfatal myocardial infarction in the GuLF STUDY

 

MI cases/na

RRb (95% CI)

MI cases/na

RRb (95% CI)

LRTe P-value*

 

Among workers and non-workers without prevalent MI (N = 31,109)

 

Ever smoker (n = 15,861)

Never smoker (n = 15,016)

Worked on clean-up

 Yes

100/12043

0.99 (0.67, 1.47)

52/11359

1.98 (0.98, 4.03)

0.11

 No

33/3533

ref

9/3341

ref

Residential proximity to oil spillc

 Direct/indirect

97/10377

0.99 (0.67, 1.48)

45/8114

1.52 (0.84, 2.76)

0.26

 Away from the spill

36/5199

ref

16/6586

ref

 

Among clean-up workers and responders without prevalent MI (n = 24,009)

 

Ever smoker (n = 12,510)

Never smoker (n = 11,701)

Maximum exposure jobd

 Response Work

14/2338

0.66 (0.30, 1.45)

7/1974

0.80 (0.28, 2.25)

< 0.01

 Operations Work

30/2471

1.21 (0.60, 2.44)

10/1744

1.11 (0.42, 2.93)

 Clean-up on Water

11./1955

0.53 (0.23, 1.22)

9/1651

1.02 (0.38, 2.75)

 Decontamination

26/1856

1.74 (0.86, 3.51)

7/1587

1.20 (0.43, 3.39)

 Clean-up on Land

7/1764

0.47 (0.18, 1.20)

11/1724

1.89 (0.75, 4.72)

 Administrative Support

12/1659

ref

8/2679

ref

Work duration

  > 180 days

24/2699

1.53 (0.71, 3.30)

14/2463

2.90 (0.83, 10.09)

0.21

 91–180 days

37/4306

1.37 (0.66, 2.83)

20/3751

2.54 (0.76, 8.55)

 31–90 days

30/3647

1.34 (0.64, 2.80)

15/3681

2.16 (0.63, 7.43)

 1–30 days

9/1391

ref

3/1464

ref

Ever had to stop work due to heatd

 Yes

53/4125

2.39 (1.58, 3.60)

18/3096

1.23 (0.68, 2.24)

0.07

 No

42/7048

ref

30/6796

ref

Worked near burning oild

 Yes

10/1104

1.11 (0.57, 2.14)

4/969

0.98 (0.35, 2.74)

0.31

 No

90/10939

ref

48/10390

ref

Maximum overall THC exposure

  ≥ 3.00 ppm

19/1822

1.67 (0.79, 3.55)

6/1502

1.43 (0.47, 4.34)

0.05

 1.00–2.99 ppm

34/4073

1.13 (0.56, 2.26)

16/3111

1.32 (0.53, 3.32)

 0.30–0.99 ppm

36/4061

1.43 (0.73, 2.83)

23/3614

2.29 (0.97, 5.39)

  < 0.30 ppm

11/2071

ref

7/3122

ref

  1. aNumber of observations included in the fully adjusted model, by exposure status
  2. bRisk ratios (RR) adjusting for age, gender, BMI, education, and residential proximity to the oil spill
  3. cModels adjust for duration of clean-up work in addition to the confounders age, gender, BMI, and education
  4. dModels adjust for duration of clean-up work in addition to the confounders age, gender, BMI, education, and residential proximity to the oil spill
  5. eLRT Likelihood Ratio Test. The LRT was used to assess statistical significance of an interaction term between the modifier variable and the main exposure variable
  6. *Alpha = 0.05