TABLE 2.
MRI Intensity Index | ||
---|---|---|
Mean | Difference in Index in Mn-Exposed vs Nonexposed (95% CI)* | |
Caudate | ||
Nonexposed participants (N = 29) | 87.3 | Reference |
Mn-exposed workers (N = 12) | 90.3 | 1.57 (0.16–2.99) |
Mn-exposed welders (N = 21) | 88.0 | P = 0.03 |
Anterior putamen | ||
Nonexposed participants (N = 29) | 90.7 | Reference |
Mn-exposed workers (N = 12) | 94.7 | 3.17 (1.00–5.34) |
Mn-exposed welders (N = 27) | 93.2 | P = 0.005 |
Posterior putamen | ||
Nonexposed participants (N = 29) | 99.5 | Reference |
Mn-exposed workers (N = 12) | 104.3 | 2.73 (−0.05 to 5.51) |
Mn-exposed welders (N = 21) | 101.1 | P = 0.05 |
Globus pallidus | ||
Nonexposed participants (N = 29) | 114.6 | Reference |
Mn-exposed workers (N = 12) | 120.2 | 8.20 (4.19–12.2) |
Mn-exposed welders (N = 27) | 123.1 | P < 0.005 |
Mean T1-weighted index among Mn-exposed welders and workers as compared with nonexposed participants, while adjusted for age (continuous) and sex.
CI, confidence interval; Mn, manganese; MRI, magnetic resonance imaging.