TABLE 5.

Threshold effect analysis of BMI and WC on albuminuria using a two-piecewise linear regression model.

	BMI	WC
Fitting by standard linear model
OR1 (95% CI2),	1.00 (0.99, 1.01)	11.00 (1.00, 1.01)
P-value	0.4177	0.1674
Fitting by two-piecewise linear model
Breakpoint (K)	22.57	80.30
OR1 (< 11.11)	0.80 (0.75, 0.84) < 0.0001	0.91 (0.88, 0.93) < 0.0001
OR2 (> 11.11)	1.02 (1.01, 1.03) 0.0007	1.01 (1.00, 1.01) 0.0001
OR2/OR1	1.28 (1.20, 1.36) < 0.0001	1.11 (1.08, 1.14) < 0.0001
Logarithmic likelihood ratio test P-value	< 0.001	< 0.001

BMI, body mass index; WC, waist circumference. Age, race, education level, body mass index, serum creatinine, serum uric acid, SBP, DBP, total cholesterol, triglycerides, fasting plasma glucose, hemoglobin A1c, HDL-C, LDL-C, ALT, AST, smoking, hypertension, and diabetes status were adjusted.

¹OR: Odds ratio.

²95% CI: 95% confidence interval.