Table 1.
Cohort demographics by sex in eleven plants
| Male | Female | |||||||
|---|---|---|---|---|---|---|---|---|
| Hourly (n = 9,280) | Salaried (n = 3,322) | Hourly (n = 793) | Salaried (n = 1,223) | |||||
| Mean | (SD) | Mean | (SD) | Mean | (SD) | Mean | (SD) | |
| Age | 46.7 | (9.0) | 45.6 | (8.4) | 44.4 | (8.9) | 43.0 | (8.8) |
| Income | 50,685 | (11,389) | 95,025 | (134,791) | 45,707 | (10,385) | 67,436 | (47,581) |
| (median income): | 49,201 | 75,883 | 45,025 | 55,134 | ||||
| Tenure | ||||||||
| (years on the job) | 18.4 | (11.8) | 16.7 | (10.2) | 12.1 | (9.1) | 13.5 | (9.3) |
| BMI | 30.0 | (5.2)* | 29.2 | (5.0)* | 29.9 | (6.0) | 26.5 | (5.7) |
| Job grade | 12.4 | (8.3) | 14.8 | (5.7) | 7.3 | (5.7) | 11.0 | (4.6) |
| N | (%) | N | (%) | N | (%) | N | (%) | |
| Education: | ||||||||
| Less than HS | 4,133 | (44.5) | 405 | (12.2) | 337 | (42.5) | 104 | (8.5) |
| HS grad+ | 1,306 | (14.1) | 751 | (22.6) | 138 | (17.4) | 185 | (15.1) |
| Unknown | 3,841 | (41.4) | 2,166 | (65.2) | 318 | (40.1) | 934 | (76.4) |
| Race/ ethnicity: | ||||||||
| Caucasian | 7,942 | (85.6) | 2,979 | (89.7) | 569 | (71.8) | 1,068 | (87.3) |
| African-American | 875 | (9.4) | 166 | (5.0) | 188 | (23.7) | 109 | (8.9) |
| Hispanic | 410 | (4.4) | 107 | (3.2) | 27 | (3.4) | 28 | (2.3) |
| Other/ Unknown | 53 | (0.6) | 70 | (2.1) | 9 | (1.1) | 18 | (1.5) |
| Smoking: | ||||||||
| Current | 1,623 | (17.5) | 209 | (6.3) | 169 | (21.3) | 43 | (3.5) |
| Prior | 1,412 | (15.2) | 287 | (8.6) | 85 | (10.7) | 55 | (4.5) |
| Never | 2,021 | (21.8) | 610 | (18.4) | 198 | (25.0) | 196 | (16.0) |
| Unknown | 4,224 | (45.5) | 2,216 | (66.7) | 341 | (43.0) | 929 | (76.0) |
| Hypertension | 1,101 | (11.9) | 316 | (9.5) | 94 | (11.9) | 69 | (5.6) |
| Heart disease | 392 | (4.2) | 106 | (3.2) | 16 | (2.0) | 12 | (1.0) |
*
BMI distribution is based on the 54% of all hourly and 41% of salaried personnel with non-missing data; missing BMI was not significantly associated with other covariates.