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. Author manuscript; available in PMC: 2019 May 1.
Published in final edited form as: Epidemiology. 2018 May;29(3):315–322. doi: 10.1097/EDE.0000000000000808

Table 1.

Characteristics of GuLF STUDY home visit participants with acceptable pulmonary function test quality by work status (n=7,775)

Characteristics Workers
(n=6,294)
Non-workers
(n=1,481)
Mean (SD) Mean (SD)
Age, years 43.5 (12.7) 46.7 (13.1)
Height, inches 68.4 (3.6) 67.8 (3.8)
Weight, lbs 199.9 (47.2) 193.0 (47.7)

n (%) n (%)

Gender
  Female 1281 (20) 460 (31)
  Male 5013 (80) 1021 (69)
Race
  White 3566 (57) 828 (56)
  Black 2094 (33) 468 (32)
  Other 634 (10) 185 (12)
Ethnicity
  Hispanic 395 (6.3) 102 (6.9)
  Non-Hispanic 5899 (94) 1379 (93)
Smoking status
  Heavy current smoker 773 (12) 170 (11)
  Light current smoker 1540 (24) 322 (22)
  Former smoker 1292 (21) 361 (24)
  Never smoker 2689 (43) 628 (42)
Secondhand smoke
  Yes 1838 (29) 431 (29)
  No 4456 (71) 1050 (71)
Education
  Less than high school/equivalent 1214 (19) 297 (20)
  High school diploma/GED 2141 (34) 461 (31)
  Some college/2-year degree 1988 (32) 436 (29)
  4-year college graduate or more 951 (15) 287 (19)
Employment
  Working now 3576 (57) 749 (51)
  Looking for work or unemployed 1657 (26) 362 (24)
  Other 1061 (17) 370 (25)
Residential county proximity to Gulf of Mexicoa
  Direct 4554 (72) 1044 (70)
  Indirect 443 (7.0) 132 (8.9)
  Other Gulf state residence 1297 (21) 305 (21)
Previous oil spill clean-up work
  Yes 522 (8.3) 86 (5.8)
  No 5772 (92) 1395 (94)
Previous oil industry experience
  Yes 1075 (17) 237 (16)
  No 5219 (83) 1244 (84)
Reported pre-spill lung disease diagnosis
  Yes 855 (14) 240 (16)
  No 5439 (86) 1241 (84)
Reported pre-spill diabetes diagnosis
  Yes 331 (5.3) 121 (8.2)
  No 5963 (95) 1360 (92)

Abbreviations: GuLF STUDY, Gulf Long-Term Follow-up Study; SD, standard deviation; GED, General Equivalency Diploma

a

Direct proximity is defined as living in a county directly adjacent to the Gulf of Mexico; indirect is defined as living in a county adjacent to coastal counties; other Gulf state residence is defined as living in a Gulf state further from the spill.