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. Author manuscript; available in PMC: 2009 Feb 20.

Published in final edited form as: J Am Geriatr Soc. 2007 Jun;55(6):816–823. doi: 10.1111/j.1532-5415.2007.01196.x

Table 2. Odds Ratios for Glomerular Filtration Rate (GFR) Less than 60 mL/min, According to Age Group, Sex, and Body Mass Index (BMI) Status in a Population of People Aged 65 and Older with Normal Serum Creatinine Values.

	GFR Estimation with Cockcroft-Gault Equation			GFR Estimation with Creatinine Clearance Calculated Using 24-Hour Urine Collection

Characteristic	Cases/Total (%)	OR (95% CI)	P-value	Cases/Total (%)	OR (95% CI)	P-value
Age
65–74	71/381 (18.6)	1.00^*		57/381 (15.0)	1.00^*
75–84	126/216 (58.3)	10.32 (6.36–16.75)	<.001	77/216 (35.7)	3.25 (2.14–4.93)	<.001
≥85	61/63 (96.8)	216.15 (48.80–957.50)^†	<.001	37/63 (58.7)	7.48 (4.05–13.8)^†	<.001
Sex
Male	95/302 (31.5)	1.00^*		51/302 (16.9)	1.00^*
Female	163/358 (45.5)	3.13 (1.97–4.96)	<.001	120/358 (33.5)	2.90 (1.92–4.39)	<.001
BMI, kg/m²
<22.0	38/47 (80.9)	15.66 (6.40–38.28)	<.001	26/47 (55.3)	4.20 (2.10–8.44)	<.001
22.0–24.9	99/141 (70.2)	7.05 (4.05–12.26)	<.001	52/141 (36.9)	1.85 (1.15–2.97)	.01
25.0–29.9	98/302 (34.5)	1.00^*		67/302 (22.2)	1.00^*
≥30.0	23/170 (13.5)	0.22 (0.11–0.40)^†	<.001	26/170 (15.3)	0.58 (0.34–0.98)^†	.04

^*

Reference group.

^†

P<.001 for trend.

OR = odds ratio; CI = confidence interval.