Table 7.

Relative risk for anemia after age and sex adjustment or multivariable adjustment

Prevalence of anemia after age and sex adjustment
Categories for estimated glomerular filtration rate (mL/min/1.73 m2)	Relative risk for anemia	95% confidence interval	P-value
<15	2.31	2.02–2.63	<.001
15–<30	2.01	1.90–2.12	<.001
30–<45	1.55	1.50–1.60	<.001
45–<60	1.18	1.15–1.20	<.001
60–<90	Reference

Prevalence of anemia after multivariable adjustment
Categories for estimated glomerular filtration rate (mL/min/1.73 m2)	Relative risk for anemia	95% confidence interval	P-value
<15	1.75	1.55–1.96	<.001
15–<30	1.69	1.61–1.78	<.001
30–<45	1.43	1.39–1.48	<.001
45–<60	1.15	1.12–1.17	<.001
60–<90	Reference

Differences in estimated glomerular filtration rate among the same estimated glomerular filtration rate category, albuminuria levels, and interaction terms between albuminuria and estimated glomerular filtration rate category were controlled in both models.