Table 1.
Subject Exposure Assessment
| Scan 1 | Scan 2 | |
|---|---|---|
| N | 17 | 17 |
| [Mn]Air (mg/m3) | 0.11 (0.075–0.145) | 0.087 (0.079–0.110) |
| MnToenail (μg/g) | 5.63 (4.67–7.57) | 5.49 (4.38–6.98) |
| Mn-CEI3M (mg/m3 * year) | 0.031 (0.014–0.048) | 0.017 (0.006–0.027) |
| Mn-CEI7–12M (mg/m3 * year) | 0.055 (0.031–0.069) | 0.033 (0.012–0.054) |
| Mn-CEI12M (mg/m3 * year) | 0.134 (0.066–0.199) | 0.067* (0.024–0.109) |
| Mn-CEILife (mg/m3 * year) | 0.875 (0.40–2.441) | 1.05 (0.592–2.44) |
Median (interquartile range [IQR]) Mn exposure values for all participants. Air Mn and Toenail Mn were directly measured whereas cumulative exposure indexes (CEIs) were estimated using Air Mn and a work history questionnaire. Although all values decreased between Scan 1 and Scan 2, only Mn-CEI12M was significantly lower in Scan 2 (p = .03).
*
p < .05.