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Re: st: Not sure how to interpret -somersd- results

From   "Roger B. Newson" <>
Subject   Re: st: Not sure how to interpret -somersd- results
Date   Thu, 03 Oct 2013 19:44:51 +0100

No, this doesn't create any problem. If they were the same children in both years, then this would require slightly different options, but these would probably make the confidence interval thinner, not fatter.

Best wishes


Roger B Newson BSc MSc DPhil
Lecturer in Medical Statistics
Respiratory Epidemiology and Public Health Group
National Heart and Lung Institute
Imperial College London
Royal Brompton Campus
Room 33, Emmanuel Kaye Building
1B Manresa Road
London SW3 6LR
Tel: +44 (0)20 7352 8121 ext 3381
Fax: +44 (0)20 7351 8322
Web page:
Departmental Web page:

Opinions expressed are those of the author, not of the institution.

On 03/10/2013 19:41, Jain, Monica (HarvestPlus) wrote:
Thanks so much! The observations do correspond to individual children, but they come from a panel household data which started in 1996. Households were initially selected using stratified random sampling in each district. Because of the ten year period, the sample of small children has changed across time. Does this create any problem?


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