Vitamin D Status Is Negatively Correlated with Insulin Resistance in Chinese Type 2 Diabetes

Table 1

Characteristics of the study population.

Variables
Age (years)	50.38 ± 13.47	117
Men	53.85	63
Body mass index (kg/m^2)	24.90 ± 3.24	117
Systolic blood pressure (mmHg)	125.76 ± 14.79	117
Diastolic blood pressure (mmHg)	80.85 ± 9.30	117
Fasting plasma glucose (mmol/L)	8.23 ± 3.28	117
HOMA-IR	5.79 ± 2.14	117
C-peptide (μIU/mL)	2.09 ± 1.04	117
25(OH)D (ng/mL)	21.40 ± 10.68 (53.1 ± 26.35 nmol/L)	114
Vitamin D deficiency	52.6	60
Vitamin D insufficiency	26.3	30
Normal 25(OH)D value	21.1	24
HbA1c (%)	9.51 ± 2.81	117
iPTH (pg/mL)	43.07 ± 14.21	114
TC (mmol/L)	5.14 ± 1.12	117
LDL (mmol/L)	3.06 ± 1.01	117
Ca (mmol/L)	2.33 ± 0.14	117
P (mmol/L)	1.36 ± 0.15	117
eGFR (mL/min⋅1.73 m^2)	111.70 [93.85–131.35]	117
History (year)	3.00 [0.00–8.00]	117
FINS	117.10 [72.30–156.52]	117
TG	1.65 [1.06–2.82]	117
HDL	1.23 [1.11–1.46]	117
BUN	4.81 [4.13–5.69]	117
SCr	56.50 [48.05–70.45]	117

Notes: mean ± SD, median [interquartile range], and percentage.
HOMA-IR: homeostatic model estimates of insulin resistance, 25(OH)D: 25-hydroxyvitamin D, TC: total cholesterol, LDL: low-density lipoprotein, Ca: serum calcium, P: serum phosphorus, eGFR: glomerular filtration rate, FINS: fasting blood insulin, TG: triglyceride, HDL: high-density lipoprotein, BUN: blood urea nitrogen, SCr: serum creatinine, and HbA1c: glycated hemoglobin A1c, iPTH: intact parathyroid hormone.