Table 3.
Postural sway area for H2S exposure concentration groups [ppm (mean ± SD)].
| Sway area (cm2)
|
||||||
|---|---|---|---|---|---|---|
| 0.05 ppm
|
0.5 ppm
|
5 ppm
|
||||
| Test condition | Preexposure | Exposure | Preexposure | Exposure | Preexposure | Exposure |
| Eyes opena | 1.72 ± 0.81 | 1.85 ± 1.15 | 1.78 ± 0.80 | 1.91 ± 1.22 | 1.84 ± 0.97 | 1.68 ± 0.94 |
| Eyes closedb | 2.32 ± 1.46 | 2.36 ± 1.91 | 2.65 ± 1.60 | 2.80 ± 2.64 | 2.64 ± 1.67 | 2.40 ± 1.61 |
| Eyes open, soft surfacec | 2.48 ± 1.20 | 2.11 ± 0.75 | 2.59 ± 1.32 | 2.20 ± 0.97 | 2.81 ± 1.43 | 2.32 ± 0.98 |
| Eyes closed, soft surface | 5.23 ± 2.51 | 4.86 ± 2.75 | 5.63 ± 2.98 | 5.03 ± 2.82 | 5.71 ± 3.77 | 5.19 ± 3.22 |
| Right leg | 3.99 ± 1.69 | 4.11 ± 1.64 | 4.34 ± 1.70 | 3.85 ± 1.59 | 4.27 ± 1.66 | 4.19 ± 2.08 |
| Left leg | 4.40 ± 1.85 | 3.94 ± 1.65 | 4.40 ± 1.78 | 3.96 ± 1.61 | 4.26 ± 1.44 | 3.85 ± 1.92 |
a
Exposure × time interaction (F = 2.52; df = 2, 212; p = 0.08).
b
Exposure main effect: 0.05 ppm > 0.5 ppm; 0.05 ppm > 5 ppm (F = 5.28; df = 2, 141; p = 0.006).
c
Exposure main effect: 0.05 ppm > 0.5 ppm; 0.05 ppm > 5 ppm (F = 4.49; df = 2,141; p = 0.01)