Table 6

Logistic regression analysis of related factors for DR (BMI <28 kg/m²; ≥28 kg/m²)

	Factors	B	SE	Wald χ²	P value	OR	95% CI
BMI <28 kg/m²	Sex	0.168	0.290	0.334	0.563	1.183	0.670 to 2.089
BMI <28 kg/m²	Hypertension	0.138	0.213	0.421	0.517	1.148	0.756 to 1.744
	Drinking history	−0.015	0.279	0.003	0.958	0.986	0.571 to 1.701
	HbA1c	0.001	0.045	0.000	0.9983	1.001	0.917 to 1.093
	Family history of DM	−0.406	0.208	3.815	0.051	0.666	0.443 to 1.001
	Age (years)			1.535	0.464
	<50	–	–	–	–	1	–
	50–60	0.071	0.279	0.065	0.799	1.074	0.621 to 1.856
	≥60	−0.221	0.281	0.621	0.431	0.801	0.462 to 1.390
	Smoking status			1.595	0.450
	Non-smoking	–	–	–	–	1	–
	Light and moderate smoking	0.380	0.328	1.345	0.246	1.463	0.769 to 2.781
	Heavy smoking	0.342	0.321	1.136	0.286	1.408	0.751 to 2.640
BMI ≥28 kg/m²	Sex	0.040	0.392	0.010	0.919	1.040	0.483 to 2.242
BMI ≥28 kg/m²	Hypertension	0.400	0.318	1.578	0.209	1.492	0.799 to 2.784
	Drinking history	0.593	0.384	2.378	0.123	1.809	0.852 to 3.842
	HbA1c	0.000	0.071	0.000	0.995	1.000	0.869 to 1.150
	Family history of DM	0.398	0.340	1.374	0.241	1.489	0.765 to 2.898
	Age (years)			7.195	0.027
	<50	–	–	–	–	1	–
	50–60	−0.149	0.358	0.173	0.678	0.862	0.427 to 1.739
	≥60	−1.241	0.474	6.838	0.009	0.289	0.114 to 0.733
	Smoking status			6.920	0.031
	Non-smoking	–	–	–	–	1	–
	Light and moderate smoking	−0.330	0.435	0.573	0.449	0.719	0.306 to 1.688
	Heavy smoking	0.797	0.404	3.884	0.049	2.219	1.004 to 4.903

BMI, body mass index; DM, diabetes mellitus; DR, diabetic retinopathy; HbA1c, haemoglobin A1c.