Table 1. Demographics of MoW worker survey participants.
| Number (%) | Mean | Min/Max | |
|---|---|---|---|
| Survey participants | 3,907 | ||
| Age | 42.7 | 20 / 75 | |
| Ethnicity: | |||
| White | 2,252 (57.6%) | ||
| Non-white | 489 (7.4%) | ||
| Unknown | 1,166 (29.8%) | ||
| U.S. Work regions: | |||
| Northeast | 1,013 (25.9%) | ||
| Southeast | 535 (13.7%) | ||
| Central/Midwest | 1,663 (42.6%) | ||
| Western | 690 (17.7%) | ||
| Smoking status (yes) | 272 (9%) | ||
MoW: maintenance of way. Among the 3,995 active survey participants, 69 were excluded from analysis for missing age, one for reporting their age ≥75, and 18 for reporting being female, leaving 3,907 participants available for analysis. The 1,159 participants <75 yr old who were missing data on gender were included in the analyses due to their high likelihood of being male.