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The prevalence of COPD in England: An ontological approach to case detection in primary care

Rayner, L., Sherlock, J., Creagh-Brown, B., Williams, J. and de Lusignan, S. (2017) The prevalence of COPD in England: An ontological approach to case detection in primary care Respiratory Medicine, 132. pp. 217-225.

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Abstract

Background

Chronic obstructive pulmonary disease (COPD) is a significant cause of morbidity and mortality in England, however estimates of its prevalence vary considerably. Routinely collected and coded primary care data can be used to monitor disease prevalence, however reliance upon diagnostic codes alone is likely to miss cases.

Methods

We devised an ontological approach to COPD case detection and implemented it in a large primary care database to identify definite and probable cases of COPD. We used this to estimate the prevalence of COPD in England.

Results

Use of this approach to detect definite COPD cases yielded a prevalence of 2.57% (95% CI 2.55–2.60) in the total population, 4.56% (95%CI 4.52–4.61) in those aged ≥ 35 and 5.41% (95% CI 5.36–5.47) in ex or current smokers. The ontological approach identified an additional 10,543 definite cases compared with using diagnostic codes alone. Prevalence estimates were higher than the 1.9% prevalence currently reported by the UK primary care pay for performance (P4P) disease register. COPD prevalence when definite and probable cases were combined was 3.02% (95% CI 3.0–3.05) in the total population, 5.38% (95% CI 5.33–5.42) in those aged ≥ 35 and 6.46% (95% CI 6.46-6.40-6.56) in ex or current smokers.

Conclusions

We demonstrate a robust reproducible method for COPD case detection in routinely collected primary care data. Our calculated prevalence differed significantly from current estimates based upon P4P data, suggesting that the burden of COPD in England is greater than currently predicted.

Item Type: Article
Divisions : Faculty of Health and Medical Sciences > School of Biosciences and Medicine
Authors :
NameEmailORCID
Rayner, L.
Sherlock, J.j.sherlock@surrey.ac.uk
Creagh-Brown, B.b.creagh-brown@surrey.ac.uk
Williams, J.J.G.Williams@surrey.ac.uk
de Lusignan, S.S.Lusignan@surrey.ac.uk
Date : 4 October 2017
DOI : 10.1016/j.rmed.2017.10.024
Uncontrolled Keywords : Pulmonary disease: chronic obstructive; Prevalence; Primary health care; Models: theoretical; Epidemiologic study; Medical record systems: computerised
Depositing User : Clive Harris
Date Deposited : 18 Mar 2019 13:39
Last Modified : 18 Mar 2019 13:39
URI: http://epubs.surrey.ac.uk/id/eprint/850753

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