Table 1.
Characteristics workers in analytic sample (N=19,018)
| Characteristic | Mean(SD) |
|---|---|
| Age, years | 42(12) |
| Pack-years (among smokers) | 16(18) |
| N(%) | |
| Gender | |
| Female | 3,300(17) |
| Male | 15,718(83) |
| Race | |
| White | 12,629(66) |
| Black | 4,448(23) |
| Other | 1,941(10) |
| Hispanic ethnicity | |
| Hispanic | 1,290(7) |
| Non-Hispanic | 17,728(93) |
| Highest educational attainment | |
| Less than high school/equivalent | 2,924(15) |
| High school diploma/GED | 5,639(30) |
| Some college/2-year degree | 5,681(30) |
| 4-year college graduate or more | 4,774(25) |
| Lifetime smoking quantity | |
| Heavy current | 2,036(10) |
| Light current | 3,935(21) |
| Former | 2,979(16) |
| Never | 10,068(53) |
| Self-reported physician diagnosis of bronchitis | |
| Yes | 925(5) |
| No | 18,093(95) |
| Self-reported physician diagnosis of emphysemab | |
| Yes | 176(1) |
| No | 18,841(99) |
| Previous oil cleanup work | |
| Yes | 2,433(13) |
| No | 16,585(87) |
| Previous oil industry work | |
| Yes | 2,990(16) |
| No | 16,028(84) |
a
Excluding all workers with self-reported physician’s diagnosis of asthma prior to oil spill date
b
N=1 missing information on self-reported physician diagnosis of emphysema (but included in complete case analysis based on asthma classification)