Table 2.
Community and worker cohort demographics in target and final populations [n (%)].a
| Community cohort | Worker cohort | Final combined cohort | |||
|---|---|---|---|---|---|
| Target population (n=40,145)b | Included in final cohort [n=28,541)c | Target population [n=6,026) | Included in final cohort [n=3,713)d | [n=32,254) | |
| Year of birth | |||||
| <1920 | 171 (0.4) | 114 (0.4) | 416 (6.9) | 59 (1.6) | 173 (0.5) |
| 1920–1929 | 1,363 (3.4) | 944 (3.3) | 532 (8.8) | 175 (4.7) | 1,119 (3.5) |
| 1930–1939 | 3,813 (9.5) | 2,798 (9.8) | 873 (14.5) | 552 (14.9) | 3,350 (10.4) |
| 1940–1949 | 6,819 (17.0) | 5,067 (17.8) | 1,276 (21.2) | 974 (26.2) | 6,041 (18.7) |
| 1950–1959 | 8,671 (21.6) | 6,480 (22.7) | 1,109 (18.4) | 840 (22.6) | 7,320 (22.7) |
| 1960–1969 | 8,202 (20.4) | 5,728 (20.1) | 1,166 (19.3) | 723 (19.5) | 6,451 (20.0) |
| 1970–1979 | 6,952 (17.3) | 4,674 (16.4) | 626 (10.4) | 376 (10.1) | 5,050 (15.7) |
| 1980–1982 | 4,154 (10.3) | 2,736 (9.6) | 28 (0.5) | 14 (0.4) | 2,750 (8.5) |
| Known to be deceased | 1,254 (3.1) | 726 (2.5) | 1,189 (19.7) | 204 (5.5) | 930 (2.9) |
| Female sex | 21,146 (52.7) | 16,602 (58.2)e | 1,156 (19.2) | 758 (20.4) | 17,360 (53.8) |
| Race | |||||
| White, non–Hispanic | 39,083 (97.4) | 27,901 (97.8) | NA | 3,284 (88.5) | 31,185 (96.7) |
| Other | 996 (2.5) | 640 (2.2) | NA | 134 (3.6) | 774 (2.4) |
| Missing | 66 (0.2) | 0 | NA | 295 (7.9) | 295 (0.9) |
| Education | |||||
| <High school | 4,500 (11.2) | 3,026 (10.6) | NA | 37 (1.0) | 3,063 (9.5) |
| High school | 16,650 (41.5) | 11,706 (41.0) | NA | 1,265 (34.1) | 12,971 (40.2) |
| Some college | 13,298 (33.1) | 9,441 (33.1) | NA | 1,081 (29.1) | 10,522 (32.6) |
| ≥College diploma | 5,636 (14.0) | 4,366 (15.3) | NA | 1,328 (35.8) | 5,694 (17.7) |
| Missing | 61 (0.2) | 2 (0.01) | NA | 2 (0.1) | 4 (0.01) |
| Smoking | |||||
| Never smoked | 18,186 (45.3) | 13,527 (47.4) | NA | 1,989 (53.6) | 15,516 (48.1) |
| Smoked and quit | 12,276 (30.6) | 8,899 (31.2) | NA | 1,297 (34.9) | 10,196 (31.6) |
| Smoked, did not quit | 9,683 (24.1) | 6,115 (21.4) | NA | 427 (11.5) | 6,542 (20.3) |
| Regular alcohol consumption | |||||
| Never | NA | 17,011 (59.6) | NA | 1,683 (45.3) | 18,694 (58.0) |
| Yes and quit | NA | 4,105 (14.4) | NA | 535 (14.4) | 4,640 (14.4) |
| Yes, did not quit | NA | 7,360 (25.8) | NA | 1,486 (40.0) | 8,846 (27.4) |
| Missing | NA | 65 (0.2) | NA | 9 (0.2) | 74 (0.2) |
| In community cohort | 40,145 (100) | 28,541 (100) | 2,090 (34.7) | 1,890 (50.9) | 30,431 (94.3) |
| NA, not available. aDemographic characteristics are as reported on the first survey during 2008–2011, except that information from the 2004–2005 C8HP was used when information was missing from the first survey during 2008–2011. bConsented among those in C8HP of qualifying age. cThe final community cohort included those who had no evidence of working at the plant, responded to at least one survey, and had available serum PFOA concentration estimates. dThe final worker cohort included those who responded to at least one survey and had available serum PFOA concentration estimates. eThe percentage female sex was slightly different from the target population due to exclusion of those who worked at the plant, who were predominantly male. | |||||