Table 4.

Correlation of clinical and demographic characteristics with serum magnesium.

Clinical variables		Retinopathy		No retinopathy
		Correlation coefficient	p value	Correlation coefficient	p value
Age (years)		0.063	0.661	−0.119	0.391
Duration of DM (years)		−0.206	0.151	0.014	0.923
FBS (mg/dL)		−0.331	0.019 a	0.109	0.434
PPBS (mg/dL)		−0.063	0.666	−0.021	0.878
HbA1c (%)		−0.061	0.673	0.035	0.802
Serum creatinine (mg/dL)		0.150	0.296	0.128	0.356
Serum urea (mg/dL)		−0.059	0.686	0.148	0.286
BMI (kg/m2)		0.019	0.895	−0.015	0.914
Waist circumference (cm)	Male	0.122	0.520	0.154	0.483
	Female	−0.121	0.611	−0.031	0.869

BMI, body mass index; DM, diabetes mellitus; FBS, fasting blood sugar; HbA1c, glycosylated haemoglobin; PPBS, post-prandial blood sugar.

^aPearson correlation.