Table 4. Association of insulin resistance with CKD in normal-weight and overweight/obese subjects.

	Normal weight				Overweight/obese
	Model one a		Model two b		Model one a		Model two b
	RR (95% CI)	P value	RR (95% CI)	P value	RR (95% CI)	P value	RR (95% CI)	P value
Quartile one	Reference		Reference		Reference		Reference
Quartile two	0.75	0.39	0.71	0.33	0.66	0.26	0.75	0.46
	(0.38, 1.45)		(0.36, 1.41)		(0.32, 1.37)		(0.35, 1.59)
Quartile three	0.86	0.66	0.88	0.71	1.14	0.69	1.09	0.81
	(0.45, 1.67)		(0.45, 1.72)		(0.59, 2.20)		(0.55, 2.12)
Quartile four	1.31	0.37	1.19	0.57	1.98	0.03	2.10	0.02
	(0.73, 2.37)		(0.64, 2.22)		(1.07, 3.64)		(1.11, 3.97)

a Adjusted for age, sex

b Adjusted for age, sex, history of hypertension, history of coronary heart disease, history of stroke, current smoker, current alcohol use, physical inactivity, education attainment, and taking Chinese medicine