Chest
clinical investigationsA Prospective Study of Asthma in a Rural Community
Section snippets
METHODS
The population under study consisted of the 1,303 white residents of Lebanon, Conn, who took part in an initial cross-sectional survey in 1972 and responded to a follow-up survey in 1978.
The representativeness of the follow-up population has previously been studied.20, 21 Although some few differences have been delineated between responders and nonresponders, these have not shown any consistent trends. The methods used in the original cross-sectional survey have been previously described,22 and
RESULTS
The prevalences of asthma, wheezing and chronic bronchitis by age in the cross-sectional population among those followed are shown for male and female subjects in Figure 1. The overall prevalence for asthma at the cross-sectional study was 7 percent in male subjects and 5 percent in female subjects. For wheezing, these prevalences were 22 percent for male subjects and 20 percent for female subjects. Percent prevalences for both male and female subjects increased with age up to 35 years and
DISCUSSION
Our analysis of rural community residents followed over a six-year period showed striking improvements in wheezing and asthmatic status in a large proportion of the population aged seven years and older. A significant positive association was seen between chronic bronchitis and asthma in women and a similar trend was seen in men. Finally, trends of worsening residual pulmonary function at the cross-sectional examination were seen in both male and female asthmatic subjects across asthmatic
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Presented in part at the Annual Scientific Assembly, American College of Chest Physicians, San Francisco, October 1981.
Manuscript received June 17; revision accepted November 8.