Sampling bias in asthma surveys of patients attending general practitioners in south-western Sydney.
Results from asthma surveys in patients attending general practitioners were compared with data from population-based samples. The prevalence of asthma symptoms and optimal asthma management were more common in the GP attenders. Attention should be paid to potential sources of sampling bias in chronic disease prevalence research in primary care settings.
Young
L
L
South West Sydney Area Health Service, New South Wales.
Forero
R
R
Bauman
A
A
Larkin
P
P
D001249:Asthma / Q000453:epidemiology*; D002648:Child; D002675:Child, Preschool; D003625:Data Collection; D005194:Family Practice; D006801:Humans; D009517:New South Wales / Q000453:epidemiology; D015995:Prevalence; D015983:Selection Bias