Table 4.

Correlation between B₁₂ and various parameters

Parameters	Correlation	P value
Age	0.172	<0.0001
BMI	−0.089	0.013
Duration of DM	0.017	0.706
Duration of metformin	−0.236	<0.0001
Daily dose of metformin	−0.21	<0.0001
VPT	0.262	<0.0001
DNS score	0.128	<0.0001
DN4 score	0.318	<0.0001
HbA1c	−0.09	0.378
Homocysteine	−0.147	0.038

P<0.05 considered to be statistically significant.

BMI, body mass index; DM, diabetes mellitus; DN4, Douleur Neuropathique 4; DNS, Diabetic Neuropathy Symptom; VPT, vibration perception threshold.