Chapter

Design, data collection, and analysis

Roberto J. Rona and Susan Chinn

in The National Study of Health and Growth

Published in print July 1999 | ISBN: 9780192629197
Published online September 2009 | e-ISBN: 9780191723612 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780192629197.003.0002
Design, data collection, and analysis

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This chapter describes a mixed-longitudinal study. Children were followed for as long as they remained in school, with new five year olds joining and eleven year olds leaving each year. The resulting data required non-standard analysis of data to estimate trends over time. Data were clustered by area and school; the advantages and disadvantages of this are discussed. Data collection and management methods may now be of historical interest only, but did result in high response rates, which are tabulated. Summaries of items of data, by year of collection are given. An inner city sample including ethnic minority children was studied in alternate years from 1983. Methods for standardization of measurements by age and sex are described, including the developments for those of lung function, height and weight-for-height.

Keywords: clustering; measurements; mixed-longitudinal; questionnaires; standard deviation scores; symptoms; trends

Chapter.  7852 words.  Illustrated.

Subjects: Public Health and Epidemiology

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