The study of the proportion and factors related to chronic obstructive pulmonary disease (COPD) at An Thi district, Hung Yen city, the results showed that: The disease incidence in An Thi district is 3,6 percent higher than in Hung Yen city about 3.4 percent (P0.05)
the older people are, the more increasing rate of incidence
there was significant difference in incidence between age groups (p 0.05)
the morbidity rate in man was five times higher than that in woman (P0.05)
the smokers had incidence 1.6 times higher than those of non-smokers (P0.05)
those exposed to stoves smokes had incidence 0.4 times higher than those not exposed, the difference was not significant (P0.05).