Contribution of CKD to mortality in middle-aged and elderly people with diabetes: the China Health and Retirement Longitudinal Study

Table 4 Cox Proportional Hazards Regression Models of CKD in different age groups

Variable	Participants 45 to 67 Years of Age (n = 1306)		Participants 68 + Years of Age (n = 409)
Variable	HR(95%CI)	P	HR(95%CI)	P
Chronic kidney disease: Yes vs. No	2.530(1.624, 3.943)	< 0.001	1.591(1.087, 2.329)	0.017
Sex: Male vs. Female	2.193(1.293, 3.717)	0.004	1.092(0.695, 1.715)	0.702
Education: Primary or below vs. College or above	1.438(0.575, 3.598)	0.438	1.994(0.795, 5.000)	0.141
Education: Middle school vs. College or above	1.309(0.501, 3.420)	0.582	1.239(0.419, 3.660)	0.698
Education: High school vs. College or above	0.508(0.136, 1.899)	0.314	0.705(0.081, 6.127)	0.751
Marital status: Married or partnered vs. Otherwise	0.497(0.288,0.859)	0.012	0.776(0.528, 1.142)	0.199
Smoking: Yes vs. No	1.045(0.640, 1.709)	0.859	1.602(1.039, 2.471)	0.033
Drinking: Drink but less than once a month vs. Drink more than once a month	1.007(0.440, 2.301)	0.987	1.027(0.379, 2.781)	0.959
Drinking: None vs. Drink more than once a month	1.246(0.778, 1.996)	0.361	2.053(1.210, 3.483)	0.008
Hypertension: Yes vs. No	1.652(1.128, 2.419)	0.010	1.493(1.047, 2.128)	0.027
Dyslipidemia: Yes vs. No	0.814(0.509, 1.301)	0.390	0.780(0.481, 1.266)	0.315

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