This book is an account of a study which provided unique information on trends in growth and respiratory health in British children over 25 years, with methodological discussion and other major findings including risk factors for impaired growth, obesity, respiratory disease and the distribution of coronary heart disease factors. The book provides information on trends in growth, height weight for height and subcutaneous arm tissue, and in respiratory health, asthma attacks and related symptoms, in children aged 5 to 11 years, from 1972 to 1994. It provides information on risk factors for impaired growth, obesity and respiratory disease, and on the distribution of risk factors for coronary heart disease in children. The contribution of the National Health and Growth Study extended to topics such as the effects of changes in welfare policy, under-diagnosis and under-treatment of asthma, nocturnal enuresis, disturbed sleep, the impact of passive smoking on the health of children, and the relation of lung function to the child's intra-uterine environment and to passive smoking. The methodological issues in relation to the conduct of the study and analysis of the data are discussed in non-technical language. Each contribution of the study is discussed in relation to current literature, which is fully referenced throughout.