TABLE 2.

Relevant body composition measures, gait speed, and mobility limitation of older participants of the Health ABC Study, according to sex and sex–race group, 1998–1999¹

	Men		White men		Black men		Women		White women		Black women
	valid n	1163 (48.5%)	valid n	800 (33.3%)	valid n	363 (15.1%)	valid n	1237 (51.5%)	valid n	731 (30.5%)	valid n	506 (21.1%)
Baseline aLM, kg	962	23.7 ± 3.5	672	23.1 ± 3.2	290	25.1 ± 3.7	1086	16.5 ± 3.1	655	15.2 ± 2.4	431	18.4 ± 3.1
3-y change in aLM,2 g	962	−611 ± 1164	672	−552 ± 1072	290	−750 ± 1345	1086	−349 ± 943	655	−256 ± 821	431	−490 ± 1090
6-y change in aLM,2 g	688	−1169 ± 1480	498	−1094 ± 1446	190	−1363 ± 1550	807	−705 ± 1117	509	−588 ± 994	298	−904 ± 1278
Baseline fat mass, kg	962	24.4 ± 6.9	672	24.7 ± 6.8	290	24.7 ± 7.3	1086	28.9 ± 9.2	655	26.9 ± 7.8	431	31.8 ± 10.2
3-y change in fat mass, g	962	349 ± 2789	672	344 ± 2635	290	361 ± 3121	1086	−67 ± 3309	655	57 ± 2883	431	−256 ± 3863
6-y change in fat mass, g	688	−281 ± 3832	498	−355 ± 3772	190	−88 ± 3987	807	−1363 ± 3976	509	−1118 ± 3699	298	−1782 ± 4385
Baseline gait speed, m/s	969	1.21 ± 0.20	678	1.3 ± 0.19	291	1.1 ± 0.20	1078	1.12 ± 0.20	647	1.2 ± 0.19	431	1.0 ± 0.19
3-y change in gait speed,2 m/s	969	−0.052 ± 0.16	678	−0.060 ± 0.15	291	−0.031 ± 0.18	1078	−0.053 ± 0.16	647	−0.059 ± 0.16	431	−0.043 ± 0.16
6-y change in gait speed,2 m/s	693	−0.15 ± 0.17	503	−0.16 ± 0.16	190	−0.13 ± 0.19	788	−0.13 ± 0.17	495	−0.13 ± 0.17	293	−0.13 ± 0.17
Event rate mobility limitation2,3	1052	83.3	731	73.8	321	107.4	1000	96.2	630	85.3	370	116.8

¹Values are means ± SDs or otherwise specified, n = 2400: persons included the analytical sample of ≥1 outcome. aLM, appendicular lean mass; Health ABC, Health, Aging, and Body Composition.

²Used as outcome measure.

³Event rate = number of events/1000 person-years.