Vitamin D, vitamin D receptor FokI polymorphism, and diabetic retinopathy: A case-control study in Kunming, China

Table 4 Association of FokI genotype with clinical characteristic, n (%)/mean ± SD

Variables	FF (n = 77)	Ff (n = 108)	ff (n = 118)	P value
Male	48 (62.34)	70 (64.81)	72 (61.02)	0.838
Age (years)	52.62 ± 11.98	54.56 ± 12.34	52.19 ± 11.91	0.318
Body mass index (kg/m2)	22.32 ± 3.25	22.68 ± 3.58	23.16 ± 3.20	0.218
Systolic blood pressure (mmHg)	116.85 ± 6.22	115.95 ± 5.37	117.05 ± 5.01	0.290
Diastolic blood pressure (mmHg)	76.12 ± 4.39	76.28 ± 4.50	76.84 ± 4.70	0.492
Serum uric acid (μmol/L)	340.98 ± 81.86	346.95 ± 91.15	356.91 ± 100.89	0.473
Total cholesterol (mmol/L)	4.68 ± 1.02	4.70 ± 1.04	4.58 ± 1.19	0.702
Triglycerides (mmol/L)	2.07 ± 2.13	2.17 ± 1.81	2.41 ± 2.24	0.471
Low-density lipoprotein cholesterol (mmol/L)	2.80 ± 0.82	2.82 ± 0.93	2.72 ± 1.10	0.742
High-density lipoprotein cholesterol (mmol/L)	1.19 ± 0.42	1.13 ± 0.39	1.07 ± 0.36	0.100a
Serum 25-hydroxy vitamin D (nmol/L)	59.08 ± 24.46	57.89 ± 18.87	54.61 ± 16.56	0.244
Fasting plasma glucose (mmol/L)	7.16 ± 3.15	7.06 ± 3.01	7.57 ± 2.64	0.382
Neutrophil-to-lymphocyte ratio	1.60 ± 0.53	1.72 ± 0.81	1.84 ± 0.81	0.073
Platelet-to-lymphocyte ratio	110.61 ± 40.27	113.48 ± 42.82	113.26 ± 44.36	0.885
Systemic immune-inflammation index	351.10 ± 156.80	392.70 ± 234.59	397.65 ± 234.66	0.291

^aP < 0.05.