This study compares the quality of life of a community sample of people wit
h asthma in South Australia, using population norms, people suffering from
other chronic diseases, and a sample of asthma patients from two hospital c
linics. A representative population survey was performed by trained intervi
ewers in spring 1995 of 3001 respondents aged greater than or equal to 15 y
ears. A physician's diagnosis of current asthma was reported by 299 (9.9%).
The hospital clinic sample had a physician's diagnosis and lung function E
vidence of asthma (n = 293). All completed the SF-36 health survey. Standar
dized SF-36 scores, adjusted for age, sex, and social class, were significa
ntly lower for respondents with asthma, compared with population norms, acr
oss all subscales of the SF-36 (p < 0.05). Physical component summary (PCS)
and mental component summary (MCS) scores were not significantly different
in people in the community sample with asthma from scores in people with d
iabetes and arthritis. PCS and MCS scores did not differ for those with sim
ilar symptom frequency in the community and hospital asthma samples, except
that hospital patients with frequent symptoms had significantly lower MCS
scores (p < 0.01). Asthma has a major impact on the health-related quality
of life in the community, comparable to other chronic diseases. The SF-36pe
rforms uniformly in asthma in different situations.