Citation

Watson WL, Ozanne-Smith J, Richardson J. Inj. Prev. 2007; 13(1): 45-50.

Affiliation

Monash University Accident Research Centre, Melbourne, Victoria, Australia.

Copyright

(Copyright © 2007, BMJ Publishing Group)

DOI

10.1136/ip.2005.010157

PMID

17296689

PMCID

PMC2610562

Abstract

BACKGROUND: Owing to the difficulty in prospectively measuring pre-injury health status and health-related quality of life (HRQL) in an injured cohort, population norms or retrospective baseline scores are often used as comparators for evaluating post-injury losses. However, there has been little discussion in the literature or research into the soundness of these approaches for this purpose. OBJECTIVES: To investigate the appropriateness of the retrospectively measured baseline health status and HRQL in an injured population for the purpose of evaluating post-injury losses. METHODS: A cohort of injured admitted to hospital (n = 186) was followed up for 12 months after injury. Retrospectively measured pre-injury health status and HRQL scores were compared with those at 12 months after injury for participants who reported complete recovery (n = 61) and those who did not. Retrospective baseline scores for the whole cohort were also compared with Australian population norms. RESULTS: For participants who completely recovered, no significant difference was observed between scores at baseline (measured retrospectively) and those at 12 months after injury (36-item Short Form Questionnaire physical component summary z = -1.274, p = 0.203; 36-item Short Form Questionnaire mental component summary z = -1.634, p = 0.102; Short Form 6 Dimensions: z = -1.405, p = 0.296). A borderline significant difference was observed in HRQL as measured by the Assessment of Quality of Life (z = -1.970, p = 0.049). Retrospectively measured pre-injury scores were consistently higher than Australian norms for all measures. CONCLUSIONS: The injured population may not be representative of the general population. Consequently, retrospective baseline measurement of pre-injury health states may be more appropriate than general population norms for the purpose of evaluating post-injury losses in this population.

Language: en