Table 1. Number of respondents and response rate for each study year of the Longitudinal Survey of Health and Living Status of the Elderly in Taiwan.

	Calendar year
	1989	1993	1996	1999
Probability sample (n)	4412
Completed cohort (n)	4049	3155	2669	2310
Death (n)	—	582	1047	1486
Loss to follow-up (n)	363	312	333	253
Respondent rate (%)	91.8	91.0	88.9	90.1