Table 3.

Fit parameters of exponential function (95% confidence interval in parentheses) for 0.1-mm layer.

	a	b	c	d
Control	56.61 (55.71–57.51)	15.36 (14.94–15.78)	6.44 (6.17–6.71)	0.77 (0.69–0.84)
C-5	65.83 (64.67–66.99)	17.69 (17.18–18.21)	7.66 (7.33–7.98)	0.82 (0.74–0.89)
C-10	63.82 (63.14–64.51)	13.61 (13.36–13.78)	6.96 (6.77–7.16)	0.63 (0.58–0.68)
C-20	57.81 (57.49–58.13)	11.23 (11.12–11.34)	6.86 (6.76–6.96)	0.56 (0.53–0.59)
C-40	55.32 (54.99–55.66)	9.73 (9.63–9.84)	6.40 (6.25–6.56)	0.38 (0.34–0.41)
F-5	60.10 (59.03–61.16)	17.29 (16.78–17.79)	7.38 (7.10–7.67)	0.76 (0.69–0.83)
F-10	61.17 (60.05–62.29)	17.53 (17.00–18.06)	7.32 (7.02–7.63)	0.80 (0.72–0.87)
F-20	63.92 (62.71–65.13)	17.50 (16.96–18.05)	7.30 (6.98–7.61)	0.76 (0.68–0.83)
F-40	65.02 (63.92–66.12)	17.81 (17.32–18.31)	6.66 (6.36–6.95)	0.80 (0.72–0.88)
Charisma	51.51 (50.18–52.83)	16.88 (16.16–17.60)	8.49 (8.14–8.84)	0.73 (0.65–0.80)