Table 6.

Mean color confusion index and mean differences (95% CIs) according to PCE exposure level.

Test	High (n = 15) mean ± SD	Low (n = 14) mean ± SD	Unexposed (n = 25) mean ± SD	High vs. unexposed mean difference (95% CI)	Low vs. unexposed mean difference (95% CI)	High vs. low mean difference (95% CI)
Farnsworth		1.07 ± 0.13		1.04 ± 0.10		1.00 ± 0.02		0.06 (0.006, 0.120)		0.04 (–0.022, 0.094)		0.03 (–0.037, 0.092)
Lanthony		1.20 ± 0.20		1.12 ± 0.18		1.10 ± 0.09		0.10 (0.005, 0.204)		0.03 (–0.073, 0.131)		0.08 (–0.038, 0.189)