Table 2.

Serum and vitreous omentin-1 levels in controls, diabetic patients without DR, NPDR patients, and PDR patients.

Omentin-1 (ng/mL)	Controls (n = 65)	Without DR (n = 60)	NPDR (n = 49)	PDR (n = 95)	P value
Serum	208.31 (164.20–251.20)bc	184.41 (142.50–206.14)a	166.97 (132.96–199.21)a	139.96 (119.28–157.87)abc	<0.001
Vitreous	96.00 (75.24–112.64)bc	81.46 (67.84–96.39)ac	64.28 (53.08–74.45)ab	50.36 (39.91–57.73)abc	<0.001
Serum/vitreous ratio	1.99 (1.72–2.63)c	2.17 (1.82–2.57)c	2.72 (2.08–3.37)ab	2.88 (2.31–3.48)abc	<0.001

^a P < 0.05 versus control; ^b P < 0.05 versus diabetic patients without DR; ^c P < 0.05 versus NPDR patients.