Search Results - subject:"Multilevel"

Sample Size Estimation for Longitudinal Designs with Attrition: Comparing Time-Related Contrasts Between Two Groups

Hedeker, Donald; Gibbons, Robert D.; Waternaux, Christine - In: Journal of Educational and Behavioral Statistics 24 (1999) 1, pp. 70-93

Formulas for estimating sample sizes are presented to provide specified levels of power for tests of significance from a longitudinal design allowing for subject attrition. These formulas are derived for a comparison of two groups in terms of single degree-of-freedom contrasts of population...

Persistent link: https://www.econbiz.de/10010776007

Accidents to preschool children: comparing family and neighbourhood risk factors

Reading, Richard; Langford, Ian H.; Haynes, Robin; … - In: Social Science & Medicine 48 (1999) 3, pp. 321-329

multilevel modelling. Accidental injury rates were much higher in deprived urban neighbourhoods than in affluent areas but the … multilevel analysis showed that, for all accidents, much of the variation in rates was accounted for by factors at the individual …

Persistent link: https://www.econbiz.de/10008616611