Relationship between Plasma Leptin Level and Chronic Kidney Disease

Figure 1

Multivariable-adjusted odds ratio of chronic kidney disease (CKD) according to plasma leptin level (Fg/L). Solid thick line represents the predicted odds of CKD from nonparametric logistic regression; dashed lines, 95% confidence limits for the nonparametric logistic regression estimates. The nonparametric logistic regression was adjusted for age (years), sex (men, women), race-ethnicity (non-Hispanic whites, non-Hispanic blacks, Mexican Americans, others), education categories (<high school, high school, >high school), smoking (never, former, current), body mass index (normal, overweight, obese), diabetes (absent, present), and serum total cholesterol (mg/dL). The median value of quartile 1 of leptin (1.285 Fg/L) was used as the referent category to calculate odds ratios. 𝑋 axis: plasma leptin level (fg/L) plotted in log scale, Y1 axis: predicted odds ratio of CKD plotted in log scale, Y2 axis: participant number for each serum plasma leptin level.