Table 2.

Mean post-dosing readings on the product preference scale

Time (seconds)	N	Mean
		Latanoprost	Travoprost BAK-free	P-value
5	54	7.1 ± 16.2	7.8 ± 16.1	0.53
10	54	6.8 ± 15.4	7.4 ± 15.8	0.55
15	54	7.0 ± 15.2	7.2 ± 15.3	0.84
20	54	6.8 ± 15.2	7.3 ± 15.2	0.58
25	54	6.8 ± 15.2	7.0 ± 15.2	0.81
30	54	7.0 ± 15.5	6.7 ± 15.0	0.73
35	54	7.0 ± 15.5	6.4 ± 15.0	0.40
40	54	6.8 ± 15.2	6.4 ± 15.0	0.47
45	54	6.8 ± 15.2	6.4 ± 15.0	0.47
50	54	6.8 ± 15.2	6.7 ± 15.1	0.90
55	54	6.8 ± 15.2	6.6 ± 15.1	0.80
60	54	6.8 ± 15.2	6.6 ± 15.1	0.71
120	54	7.2 ± 15.3	7.6 ± 16.4	0.78
300	54	6.9 ± 15.2	7.2 ± 15.9	0.80
600	54	6.9 ± 15.2	6.5 ± 15.4	0.61
900	54	6.8 ± 15.2	5.7 ± 15.1	0.06
1200	54	6.8 ± 15.2	5.7 ± 15.1	0.06
1800	54	6.7 ± 15.2	5.8 ± 15.1	0.11
Peak	54	8.4 ± 16.5	10.5 ± 17.0	0.21
Return to baseline (seconds)	54	16.8 ± 84.1	6.7 ± 23.7	0.41