Table 17.

Marginal standardized prevalence of anemia after age and sex adjustment or multivariable adjustment when albuminuria was defined based on protein/creatinine ratio

Marginal standardized prevalence of anemia after age and sex adjustment
Categories for estimated glomerular filtration rate (mL/min/1.73 m2)	Albuminuria category	Predicted prevalence of anemia		P for interaction
		Mean	95% confidence interval
<15	Normoalbuminuria	0.59	0.49–0.69	<.001
	Microalbuminuria	0.69	0.64–0.74
	Macroalbuminuria	0.78	0.72–0.84
15–<30	Normoalbuminuria	0.53	0.50–0.56	.034
	Microalbuminuria	0.57	0.54–0.60
	Macroalbuminuria	0.57	0.54–0.60
30–<45	Normoalbuminuria	0.42	0.40–0.44	.30
	Microalbuminuria	0.43	0.41–0.45
	Macroalbuminuria	0.44	0.42–0.46
45–<60	Normoalbuminuria	0.33	0.31–0.34	.035
	Microalbuminuria	0.35	0.33–0.36
	Macroalbuminuria	0.35	0.33–0.37
60–<90	Normoalbuminuria	0.28	0.26–0.29	.057
	Microalbuminuria	0.29	0.28–0.31
	Macroalbuminuria	0.29	0.26–0.31

Marginal standardized prevalence of anemia after multivariable adjustment
Categories for estimated glomerular filtration rate (mL/min/1.73 m2)	Albuminuria category	Predicted prevalence of anemia
		Mean	95% confidence interval	P for interaction
<15	Normoalbuminuria	0.49	0.41–0.58	.005
	Microalbuminuria	0.56	0.51–0.61
	Macroalbuminuria	0.62	0.58–0.67
15–<30	Normoalbuminuria	0.46	0.43–0.49	.12
	Microalbuminuria	0.49	0.46–0.51
	Macroalbuminuria	0.49	0.47–0.52
30–<45	Normoalbuminuria	0.38	0.37–0.40	.50
	Microalbuminuria	0.39	0.37–0.41
	Macroalbuminuria	0.40	0.38–0.42
45–<60	Normoalbuminuria	0.31	0.29–0.32	.039
	Microalbuminuria	0.33	0.31–0.34
	Macroalbuminuria	0.33	0.31–0.34
60–<90	Normoalbuminuria	0.27	0.26–0.28	.13
	Microalbuminuria	0.28	0.27–0.29
	Macroalbuminuria	0.27	0.25–0.29

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.