. Author manuscript; available in PMC: 2010 Jul 1.

Published in final edited form as: Arch Intern Med. 2008 Feb 11;168(3):277–283. doi: 10.1001/archinternmed.2007.75

Table 2.

Mean and Median Barthel Activities of Daily Living Index (Barthel Index) Score of Centenarians by Age at Disease Onset (Morbidity Group) and Sex

Age at Onset	Men	Women	P Value
<85 y (survivors [n=234])
No. of subjects	58	176
Mean age at onset, y	82	60	<.001
Median age at onset, y	90	65	<.001
Barthel Index score ≥90, No. (%)^a	35 (60)	32 (18)	<.001
Barthel Index score ≥80, No. (%)^a	42 (72)	60 (34)	<.001
≥85 y (delayers [n=505])
No. of subjects	158	347
Mean age at onset, y	79	61	<.001
Median age at onset, y	90	65	<.001
Barthel Index score ≥90, No. (%)^a	80 (50)	93 (27)	<.001
Barthel Index score ≥80, No. (%)^a	98 (62)	134 (38)	<.001

A Barthel index score higher than 80 indicates independent function according to activities of daily living.