Anemia and Kidney Function Decline among the Middle-Aged and Elderly in China: A Population-Based National Longitudinal Study

Figure 2

Restricted cubic spline curve for association between hemoglobin and rapid decline in kidney function stratified by gender. Note: the models were adjusted for age, residence, education, medical insurance, personal consumption expenditure, smoking, drinking, body mass index, central obesity, C-reactive protein, cardiovascular disease, hypertension, diabetes, hyperuricaemia, and baseline eGFR. The reference value of hemoglobin is 13 g/dL for men and 12 g/dL for women, respectively. Grey lines represent 95% confidence intervals of OR values. Abbreviations: eGFR: estimated glomerular filtration rate; OR: odds ratio.

(a) Male

(b) Female