The glomerular filtration rate estimated by new and old equations as a predictor of important outcomes in elderly patients

Table 1 General characteristics of the BELFRAIL population at baseline (n = 539), based on eGFR values at study entry, as estimated by different equations

	All	MDRD <60 mL/min	CKD-EPIcreat <60 mL/min	CKD-EPIcyst <60 mL/min	CKD-EPIcreatcyst <60 mL/min	BIS <60 mL/min
	(n = 539)	(n = 237, 44%)	(n = 244, 45%)	(n = 405, 75%)	(n = 247, 46%)	(n = 431, 80%)
Mean age	84.7	85.6^a	85.7^a	85.0^a	84.7	84.7
Mean age	(SD 3.6)	(SD 4.0)	(SD 4.0)	(SD 3.8)	(SD 3.7)	(SD 3.7)
Male gender (%)	37	37	35	40	37	37
Hypertension (%)	70	73	79^a	73	71	73
Diabetes mellitus (%)	19	20	21	19	19	20
History of myocardial infusion (%)	11	13	12	13	11	13
History of cerebrovascular accident (%)	8	9	8	9	9	9
History of peripheral arterial disease (%)	9	9	12	10	9	9
Smoker (%)	3	3	3	3	3	4

^a P <0.05 compared with the subgroup of participants with eGFR >60 mL/min/1.73 m². SD, standard deviation.

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