Gender | Male | 10.4 (0.4) | 0.026 |
Female | 12.7 (1.0) |
Industry | Bathtub | 8.5 (0.6) | 0.254 |
Boat build | 10.0 (0.5) |
Pipe, tank | 11.7 (0.9) |
Truck, RV | 11.2 (0.5) |
Boat repair | 11.0 (3.2) |
Respirator use | No | 10.7 (0.4) | 0.576 |
Yes | 11.2 (0.8) |
Glove use | No | 11.0 (0.4) | 0.517 |
Yes | 10.5 (0.6) |
Working in a confined space | No | 10.6 (0.4) | 0.551 |
Yes | 11.1 (0.8) |
Recreational drug use | No | 10.9 (0.4) | 0.532 |
Yes | 10.3 (0.7) |
Non-prescription drug use | No | 10.8 (0.5) | 0.873 |
Yes | 10.7 (0.5) |
Prescription drug use | No | 10.9 (0.4) | 0.502 |
Yes | 10.3 (0.7) |
Styrofoam food or drink containers | No | 11.1 (0.5) | 0.457 |
Yes | 10.6 (0.5) |
Current no. of cigarettes per day | <1 | 11.7 (0.5) | 0.015 |
1–10 | 10.2 (0.9) |
11–20 | 9.1 (0.6) |
>20 | 8.6 (0.8) |
Current no. of alcoholic beverages per week | <1 | 10.8 (0.5) | 0.155 |
1–7 | 10.7 (0.6) |
8–21 | 11.6 (1.3) |
>21 | 6.9 (0.6) |
Ethnicity | Caucasian | 10.3 (0.5) | 0.111 |
Hispanic | 12.2 (0.7) |
Other† | 11.1 (1.2) |
Season | Dec–Feb | 11.3 (0.6) | 0.516 |
| Mar–May | 10.2 (0.8) |
| June–Aug | 10.1 (0.5) |
| Sep–Nov | 11.2 (0.9) |
Time of day | 21:00–4:59 | 12.5 (1.3) | 0.245 |
| 13:00–16:59 | 10.5 (0.4) |
| 17:00–20:59 | 10.8 (0.7) |
| |
Correlation coefficient
| |
Age | | −0.114 | 0.085 |
Body mass index‡ | | −0.022 | 0.736 |
Income | | −0.163 | 0.013 |
Air styrene | | 0.123 | 0.063 |
Blood styrene | | 0.168 | 0.016 |