Executive summary Asthma is responsible for considerable global morbidity and health-care
costs. Substantial progress was made against key outcomes such as hospital admissions …

Background. Declining family size is one factor that has been proposed to contribute to
increasing asthma and hay fever prevalence, but its relative importance has not been …

Objective: To describe the incidence and prognosis of wheezing illness from birth to age 33
and the relation of incidence to perinatal, medical, social, environmental, and lifestyle …

The future of disability in America will depend on how well the US prepares for and
manages the demographic, fiscal, and technological developments that will unfold during …

BACKGROUND Impaired fetal growth may be a risk factor for asthma although evidence in
children is conflicting and there are few data in adults. Little is known about risk factors …

Objective.—To assess the effect of improved survival of increasingly premature infants by
examining the outcomes at school age of a large group of children born at different birth …

Socioeconomic status, whether measured by education, income, or other indices of social
class, has long been known to be associated with mortality from diVerent diseases. 1–7 This …

OBJECTIVE--To determine whether birth weight and gestational age are associated with
respiratory illness and lung function in children aged 5-11 years. DESIGN--Cross sectional …

Background To study the effects of household crowding upon the respiratory health of young
children living in the city of São Paulo, Brazil. Methods Case-control study with children …

The effect of genetic and environmental factors on the prevalence of allergic disorders in
early childhood was determined in a prospective follow‐up study. Information was available …