Table 2.

Spearman correlation analysis(or Mann-Whitney U test) between serum vitamin D level and clinical factors.

Characteristics	r/z	P value		r	P value
Sex	-6.487	<0.001	FBG (mmol/L)	-0.107	<0.001
Age (year)	0.138	<0.001	HDL-c (mmol/L)	0.101	<0.001
BMI (kg/m2)	-0.006	0.799	LDL-c (mmol/L)	-0.068	0.004
SBP (mmHg)	-0.031	0.189	FT3 (pmol/L)	0.243	<0.001
DBP (mmHg)	-0.027	0.253	FT4 (pmol/L)	-0.038	0.107
TC (mmol/L)	-0.100	<0.001	TSH (mIU/L)	-0.038	0.107
TG (mmol/L)	-0.178	<0.001	HbA1c (%)	-0.172	<0.001
UA (μmol/L)	0.003	0.899	C-peptide (ng/mL)	0.114	<0.001

The correlation analysis between vitamin D and gender was conducted using the Mann-Whitney U test, while the correlation between other continuous variables and vitaminD was analyzed using Spearman correlation analysis.