Table 2 Summary of PM 2.5 , HRV, and DNA methylation in boilermakers
| Â | Mean (SD) | Difference in Measurement | p-valuea | |
|---|---|---|---|---|
Background Environment | Welding exposure | Welding – Background | ||
Personal PM2.5 (mg/m3) | 0.11 (0.14) | 0.43 (0.34) | 0.32 | <0.0001 |
| Â | Â | Â | Difference in Measurement | Â |
|  | Pre-shift | Post-shift | Post-shift – Pre-shift | p-valuea |
Alu (%5mC) | 29.4 (1.1) | 29.5 (1.06) | 0.10 | 0.396 |
LINE-1 (%5mC) | 82.5 (1.7) | 82.7 (1.7) | 0.22 | 0.240 |
SDNN (msec) | 48.2 (24.2) | 37.8 (18.7) | -8.7 | <0.0001 |
rMSSD (msec) | 26.5 (19.1) | 21.1 (11.9) | -4.45 | 0.001 |
pNN10 (%) | 51.4 (22.0) | 42.5 (22.1) | -0.08 | 0.0002 |
pNN20 (%) | 33.2 (22.6) | 25.8 (20.8) | -0.07 | 0.002 |
LF (msec2) | 1019.4 (1289.0) | 593.0 (561.9) | -378.3 | 0.0003 |
HF (msec2) | 454.6 (884.3) | 194.6 (284.3) | -228.9 | 0.001 |