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) | |||
|---|---|---|---|---|---|---|---|
| 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 insulina | 2.69 ± 1.54 | 0.20 | >0.1 | -0.23 | 0.35 | -0.20 | >0.1 |
| HOMA2-%β insulina | 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)