Table 2.

Subgroup analysis of the diabetics with and without foot infections and their outcomes in the present study with reference to the serum vitamin D level

Group	Vitamin D levels		P value
	Subnormal (<30 ng/mL)	Normal (≥30 ng/mL)
Diabetics with foot infections N=88 (%)	67 (76.14)	21 (23.86)	0.306#
Diabetics without foot infections N=88 (%)	66 (75)	22 (25)
Diabetics with foot infections mean±SD (ng/mL)	19.38±5.32	42.32±19.06	0.00001*
Diabetics without foot infections mean±SD (ng/mL)	21.91±5.16	47.67±14.59	0.0001*
Diabetics with foot infections HbA1c <7 N=8 (%)	6 (75)	2 (25)	0.937*
Diabetics with foot infections HbA1c ≥7 N=80 (%)	61 (76.25)	19 (23.75)
Neuropathy in diabetics with foot infections N=49 (%)	41 (83.67)	8 (16.33)	0.0629#
Amputation/death in diabetics with foot infections N=39 (%)	38 (97.44)	1 (2.56)	0.001#
SSG/ skin cover in diabetics with foot infections N=49 (%)	29 (59.18)	20 (40.82)
Wound healing duration>6 months in diabetics with foot infections N=27 (%)	17 (62.96)	10 (37.04)	0.0006#
Amputation/death in diabetics with foot infections mean±SD (ng/mL)	17.03±5.10	30.22	0.014*
SSG/ skin cover in diabetics with foot infections mean±SD (ng/mL)	22.45±3.73	42.92±19.30	0.0001*

^*Student t test;

^#χ2 test;

N=Number of patients; Numbers indicated in the parentheses are percentage values; SSG: Split skin graft