Table IX.

Prevalence of concurrent CKD complications among participants whose preserved eGFR_cr was confirmed versus not confirmed using eGFR_cys stratified by age

Parameter	< 65 years			65 to 79 years			≥ 80 years		P-value
	Preserved eGFRcr not confirmed using eGFRcys	Preserved eGFRcr confirmed using eGFRcys	P-value	Preserved eGFRcr not confirmed using eGFRcys	Preserved eGFRcr confirmed using eGFRcys	P-value	Preserved eGFRcr not confirmed using eGFRcys	Preserved eGFRcr confirmed using eGFRcys
Number of participants:	847	12,534		1,899	7,930		572	687
Hypertension	77.6%	49.3%	< 0.001	73.5%	59.5%	< 0.001	64.7%	62.4%	0.42
Serum albumin < 3.8 g/dl	19.4%	7.0%	< 0.001	18.1%	9.6%	< 0.001	20.0%	15.4%	0.07
Anemia	23.5%	9.2%	< 0.001	20.6%	11.3%	< 0.001	23.3%	15.1%	0.008
hsCRP > 3 mg/l	64.5%	39.8%	< 0.001	50.9%	34.5%	< 0.001	43.2%	26.1%	< 0.001
ACR > 30 mg/g	25.9%	9.5%	< 0.001	22.6%	11.8%	< 0.001	23.9%	15.3%	0.001

ACR – albumin: creatinine ratio, CKD – chronic kidney disease, eGFR – estimated glomerular filtration rate, hsCRP – high sensibility C-reactive protein. Preserved eGFR_cr confirmed using eGFR_cys was defined as eGFR_cr and eGFR_cys ≥ 60 ml/min/1.73 m². Preserved eGFR_cr not confirmed using eGFR_cys was defined as eGFR_cr ≥ 60 ml/min/1.73 m² and eGFR_cys < 60 ml/min/1.73 m². Equations for eGFR_cr and eGFR_cys are shown in Table I. Hypertension was defined as systolic blood pressure ≥ 140 mm Hg, diastolic blood pressure ≥ 90 mm Hg, or self-reported use of antihypertensive medications. Anemia was defined as hemoglobin concentration < 13.0 g/dl and < 12.0 g/dl for males and females, respectively [15].