Derivation and validation of a composite index of severity in chronic obstructive pulmonary disease: the DOSE Index

Rupert C Jones, Gavin C Donaldson, Niels H Chavannes, Kozui Kida, Maria Dickson-Spillmann, Samantha Harding, Jadwiga A Wedzicha, David Price, Michael E Hyland

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190 Citations (Scopus)

Abstract

RATIONALE: Chronic obstructive pulmonary disease (COPD) is increasingly recognized as a multicomponent disease with systemic consequences and effects on quality of life. Single measures such as lung function provide a limited reflection of how the disease affects patients. Composite measures have the potential to account for many of the facets of COPD. OBJECTIVES: To derive and validate a multicomponent assessment tool of COPD severity that is applicable to all patients and health care settings. METHODS: The index was derived using data from 375 patients with COPD in primary care. Regression analysis led to a model explaining 48% of the variance in health status as measured by the Clinical COPD Questionnaire with four components: dyspnea (D), airflow obstruction (O), smoking status (S), and exacerbation frequency (E). The DOSE Index was validated in cross-sectional and longitudinal samples in various health care settings in Holland, Japan, and the United Kingdom. MEASUREMENTS AND MAIN RESULTS: The DOSE Index correlated with health status in all data sets. A high DOSE Index score (> or = 4) was associated with a greater risk of hospital admission (odds ratio, 8.3 [4.1-17]) or respiratory failure (odds ratio, 7.8 [3.4-18.3]). The index predicted exacerbations in the subsequent year (P <or = 0.014). CONCLUSIONS: The DOSE Index is a simple, valid tool for assessing the severity of COPD. The index is related to a range of clinically important outcomes such as health care consumption and predicts future events.
Original languageEnglish
Pages (from-to)1189-1195
Number of pages7
JournalAmerican Journal of Respiratory and Critical Care Medicine
Volume180
Issue number12
Early online date24 Sep 2009
DOIs
Publication statusPublished - 15 Nov 2009

Keywords

  • aged
  • cohort studies
  • cross-sectional studies
  • dyspnea
  • female
  • health status
  • hospitalization
  • humans
  • longitudinal studies
  • male
  • middle aged
  • odds ratio
  • pulmonary disease, chronic obstructive
  • questionnaires
  • reproducibility of results
  • respiratory insufficiency
  • severity of illness index
  • smoking

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    Jones, R. C., Donaldson, G. C., Chavannes, N. H., Kida, K., Dickson-Spillmann, M., Harding, S., Wedzicha, J. A., Price, D., & Hyland, M. E. (2009). Derivation and validation of a composite index of severity in chronic obstructive pulmonary disease: the DOSE Index. American Journal of Respiratory and Critical Care Medicine, 180(12), 1189-1195. https://doi.org/10.1164/rccm.200902-0271OC