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. 2012 May 18;12:9. doi: 10.1186/1471-2415-12-9

Table 5.

Percentage change in IOP (mmHg) from baseline to week 4 (ANCOVA, PP population)

  Latanoprost concentration (μg/mL)
 
50
75
100
125
N
69
66
71
68
Worse eye
8 a.m. IOP
 LS mean change (mmHg)*
−37.6
−35.5
−37.3
−33.5
 Difference in LS mean change ± SEM
 
2.2 ± 1.7
0.3 ± 1.7
4.1 ± 1.7
 (90% CI)
 
(−0.06, 5.0)
(−2.4, 3.1)
(1.3, 6.8)
 p-value
 
0.899
0.581
0.992
Study eye
8 a.m. IOP
 LS mean change (mmHg)*
−37.2
−35.0
−36.4
−33.3
 Difference in LS mean change ± SEM
 
2.2 ± 1.7
0.8 ± 1.6
3.8 ± 1.6
 (90% CI)
 
(−0.6, 4.9)
(−1.9, 3.4)
(1.1, 6.5)
 p-value   0.906 0.682 0.990

ANCOVA analysis of covariance, CI confidence interval, IOP intraocular pressure, LS least square, PP per protocol, SEM standard error of the mean.

*Adjusting for baseline IOP (covariate) with dose group and center as factors.

Higher concentration minus latanoprost 50 μg/mL; a negative difference in LS mean indicates that the higher concentration has a greater effect than latanoprost 50 μg/mL.

One-sided p-value.