Table 2.

Associations of serum retinol concentration in normal-tension glaucoma, primary open-angle glaucoma and healthy groups.

	NTG		POAG		Healthy
VARIABLE	r	p	r	p	r	p
Age (years)	−0.031	0.761	0.131	0.184	−0.239	0.005
Female, no. (%)	0.127	0.204	0.338	<0.001	0.224	0.008
Height (cm)	0.139	0.169	0.260	0.008	0.234	0.006
Weight (kg)	−0.028	0.783	0.229	0.018	0.207	0.016
BMI (kg/m2)	−0.134	0.186	0.100	0.325	0.144	0.094
MAP (mmHg)	−0.147	0.187	0.061	0.554	0.181	0.034
IOP (mmHg)	0.012	0.906	−0.175	0.072	0.130	0.166

Spearman correlations are depicted [values on coefficient of correlation (r) and p values (p)]. Statistically significant P values (p < 0.05) were in boldface.

BMI body mass index, MAP mean arterial pressure, IOP intraocular pressure.