The Prevalence and Incidence of COPD Among Urban
Older Persons of Bangkok Metropolist
KHUN NANTA MARANETRA, M.D.*, BENJAMAS CHUAYCHOO, M.D.*,
WANCHAI DEJSOMRITRUTAI, M.D., M.Sc. *, NITIPAT ANA CHIERAKUL, M.D.*,
ARTH NANA, M.D.*, JARIYA LERTAKYAMANEE, M.D.**,
CHANA NARUMAN, M.Sc.*, T ASNEEYA SUTHAMSMAI, M.Sc. *,
SUTEE SANGKAEW, B.N.*, WICHEAN SREELUM, Dip. M.S.T.*,
MONTCHAI AKSORNIN, Dip. A.N.*, JAROON DECHAPOL, B.A.*,
WICHEAN SATHET, Dip. A.N.*
Affiliation : * Division of Respiratory Disease and Tuberculosis, Department of Medicine,
** Department of Anaesthesiology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand.
t Financially supported by The National Research Council of Thailand.
AbstractCOPD substantially affects the national healthcare resource and healthcare cost especially
among the older persons. Identifying the accurate prevalence and incidence reflects the scale of pro
blem posed by COPD. This epidemiological study using the criteria for diagnosing COPD based on
ratio of FEY JFYC less than 70 per cent and the reversibility of less than 15 per cent increase of
post bronchodilator FEY 1.o in the absence of parenchymal lesions and cardiomegaly in CXR (PA and
lateral view) revealed the prevalence (1998) of COPD among the 3094 older persons aged 60 years
and over in the communities of Bangkok Metropolis 10 km around Siriraj Hospital was 7.11 per cent
(95% CI: 6.21-8.01), whereas the incidence (1999) of COPD was 3.63 per cent (95% CI: 2.83-4.43).
Both the prevalence and the incidence were increased with increasing age.The disease occurred pre
dominantly among male smokers. The distribution of mild : moderate : severe COPD in the prevalence
study was 5.6 : 2.2 : 1.
The current findings also suggest that tobacco smoking is the prime important cause of COPD
and the indoor pollution especially cooking smoke is not significant. In particular, the unexpectedly
high incidence compared with prevalence in this population probably represents the warning message
to the national policy maker for prompt and effective health promotion and disease prevention to pre
vent further social and economic loss.
Keywords : Prevalence, Incidence, COPD, Urban, Older persons, Bangkok Metropolis
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