Citation

Chou YJ, Huang N, Lee CH, Tsai SL, Chen LS, Chang HJ. Am. J. Epidemiol. 2004; 160(7): 688-695.

Affiliation

National Yang-Ming University, Taipei; Johns Hopkins Bloomberg School of Public Health;Bureau of National Health Insurance, Taipei; Academia Sinica, Taipei

Copyright

(Copyright © 2004, Oxford University Press)

DOI

10.1093/aje/kwh270

PMID

15383413

Abstract

Although, theoretically, the impacts of a disaster are not randomly distributed across health and socioeconomic classes, empirical evidence of this claim is scarce. In a population-based cohort study, the authors identified risk factors for mortality from the September 21, 1999, Taiwan earthquake, which occurred in the middle of the night. Among 297,047 earthquake victims in central Taiwan who experienced partial or complete dwelling damage, 295,437 (noncases) survived the earthquake and 1,610 (cases) died between September 21 and October 31, 1999. Odds ratios were adjusted for both micro-level individual variables and macro-level neighborhood variables. People with mental disorders (odds ratio (OR) = 2.0, 95% confidence interval (CI): 1.1, 3.5), people with moderate physical disabilities (OR = 1.7, 95% CI: 1.2, 2.3), and people who had been hospitalized just prior to the earthquake (OR = 1.4, 95% CI: 1.2, 1.7) were the most vulnerable. The degree of vulnerability increased with decreasing monthly wage (measured in New Taiwanese dollars (NT$)) (NT$20,000 approximately NT$39,999: OR = 1.5, 95% CI: 1.1, 2.1; <NT$20,000: OR = 2.2, 95% CI: 1.6, 3.0). The significant associations of both prequake health status and socioeconomic status with earthquake death suggest that earthquake death did not occur randomly. These results might help to guide allocation of public resources for reducing casualties.