Table 5.

Summary of the number of subjects who used artificial tears between LCD and placebo groups

Visit	LCD (N = 30)		Placebo (N = 29)		P-value by Z-test for LCD vs. placebo
	No	Yes	No	Yes
	n (%)	n (%)	n (%)	n (%)
Day 0–14	15 (50.00)	15 (50.00)	9 (31.03)	20 (68.97)	0.1382
Day 15–28	23 (76.67)	7 (23.33)	9 (31.03)	20 (68.97)	0.0004**
Day 29–56	23 (76.67)	7 (23.33)	9 (31.03)	20 (68.97)	0.0004**

N number of subjects in specified treatment, n number of subjects in specified category, % n (number of subjects in specified category)/N (number of subjects in specified treatment) × 100

*P < 0.05

**P < 0.01