Table 1.

Results of paired comparison of stages before, one month after and three months after taking sildenafil on the scores of intraocular pressure (post-hoc test)

Stages	Compared to	Mean difference	Standard error	p-value
Before medication	One month after use	−0.024	0.029	1
	Three months after use	−0.119	0.03	<0.001
One month after medication	Three months after use	−0.095*	0.027	0.002