Mean change ( least squares mean differences , -0.1 to 0.3 mm Hg ; 95 % confidence interval , -0.5 to 0.7 mm Hg ) and percentage change ( travoprost 0.003 % , 28.4 % -30.7 % ; travoprost 0.004 % , 28.5 % -31.0 % ) from baseline were comparable .