Table 4.
Mean (± SD) contrast sensitivities and mean differences (95% CIs) by spatial frequency according to exposure level.
| Spatial frequency (cpd) | High (n = 15) | Low (n = 14) | Unexposed (n = 25) | High vs. unexposed mean difference (95% CI) | Low vs. unexposed mean difference (95% CI) | High vs. low mean difference (95% CI) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1.5 | 60.23 ± 18.86 | 61.57 ± 18.73 | 55.34 ± 11.96 | 4.89 (–5.56, 15.35) | 6.23 (–4.46, 16.92) | –1.34 (–13.24, 10.56) | ||||||
| 3.0 | 94.13 ± 23.65 | 109.86 ± 25.23 | 107.74 ± 24.69 | –15.72 (–34.04, 2.59) | 2.11 (–14.33, 18.57) | –13.61 (–29.70, 2.49) | ||||||
| 6.0 | 102.33 ± 32.84 | 112.96 ± 29.12 | 112.84 ± 29.84 | –10.51 (–30.52, 9.50) | 0.12 (–20.33, 20.57) | –10.63 (–33.40, 12.14) | ||||||
| 12.0 | 38.20 ± 17.41 | 48.11 ± 19.78 | 50.88 ± 24.04 | –12.68 (–26.66, 1.30) | –2.77 (–17.06, 11.52) | –9.91 (–25.82, 6.00) | ||||||
| 18.0 | 14.71 ± 7.37 | 15.89 ± 7.18 | 21.78 ± 13.45 | –7.07 (–14.23, 0.10) | –5.89 (–13.06, 1.28) | –1.18 (–9.30, 6.94) |