. Author manuscript; available in PMC: 2010 Aug 18.

Published in final edited form as: J Gerontol A Biol Sci Med Sci. 2008 Feb;63(2):204–209. doi: 10.1093/gerona/63.2.204

Table 2.

Factor Loadings for the Number of Low Intensity (CPT Codes 99281 and 99282) and High Intensity (CPT Codes 99283–99285) ED Visits, by Observation Year, Among 4310 AHEAD Self-Respondents

Annual Number of ED Visits of …	Factor 1	Factor 2
Low intensity during the 1st year	.044	.456^*
Low intensity during the 2nd year	.020	.648^*
Low intensity during the 3rd year	−.109	.744^*
Low intensity during the 4th year	.037	.565^*
High intensity during the 1st year	.801^*	−.045
High intensity during the 2nd year	.791^*	.033
High intensity during the 3rd year	.769^*	−.073
High intensity during the 4th year	.545^*	.097

Notes:

Principal factor loading.

CPT = Current Procedural Terminology; ED = emergency department; AHEAD = Survey on Assets and Health Dynamics Among the Oldest Old.