Association between vitamin D and glycaemic parameters in a multi-ethnic cohort of postmenopausal women with type 2 diabetes in Saudi Arabia

Table 4 Correlations between 25(OH) D and glycaemic parameters among different ethnic groups of the study participants

Variable	Results (N=173)	White (n=126)		Black (n=30)		Asian (n=17)
Variable	Results (N=173)	r	P	r	P	r	P
Fasting insulin (pmol/L)^a	93.05 ± 72.9	-0.14	>0.1	-0.27	0.27	-0.24	>0.1
Fasting c-peptide (nmol/L)	0.98 ± 0.51	-0.23*	0.012*	-0.03	0.86	-0.21	>0.1
Fasting glucose (mmol/L)	7.4 (5.6-10.2)	-0.17	0.065	-0.13	0.57	0.075	>0.1
HbA1c (mmol/mol)	64 ± 864 ± 8	-0.03	>0.1	-0.21	0.29	0.003	>0.1
HOMA2-IR insulin^a	2.69 ± 1.54	0.20	>0.1	-0.23	0.35	-0.20	>0.1
HOMA2-%β insulin^a	79.9 (46.1-136.9)	0.10	>0.1	0.045	0.86	-0.10	>0.1
HOMA2-IR C-peptide	2.7 ± 8.56	-0.25*	0.009*	-0.23	0.27	-0.26	>0.1
HOMA2-%β C-peptide	69.5 (35.3-102.6)	0.066	>0.1	0.12	0.57	-0.23	>0.1

Correlations in white group are Pearson correlation (2-tailed). Correlations in black and Asian group are Spearman correlations (2-tailed)
^aMeasured in subjects not taking exogenous insulin, total (n=99): white (n=68), black (n=21) and Asian (n=10). HOMA2-IR is homeostatic assessment 2 for insulin resistance. HOMA2-%β is homeostatic assessment 2 for β-cell function; HOMA2-IR/% β C-peptide was calculated using fasting glucose and C-peptide; HOMA2- IR/% β insulin was calculated using fasting glucose and fasting insulin
^*Significant correlation (p<0.05)

ISSN: 1472-6823