Impact of estimation techniques on regression analysis: an application to survey data on child nutritional status in five African countries
Madise, Nyovani, Stephenson, Rob, Holmes, David and Matthews, Zoë (2003) Impact of estimation techniques on regression analysis: an application to survey data on child nutritional status in five African countries. Southampton, UK, Southampton Statistical Sciences Research Institute, 26pp. (S3RI Applications and Policy Working Papers, (A03/07) ).
This paper illustrates the impact of ignoring survey design and hierarchical structure of survey data when fitting regression models. Data on child nutritional status from Ghana, Malawi, Tanzania, Zambia, and Zimbabwe are analysed using four techniques: ordinary least squares; weighted regression using standard statistical software; regression using specialist software that accounts for the survey design; and multilevel modelling. The impact of ignoring survey design on logistic and linear regression models is examined. The results show bias in estimates averaging between five and 17 per cent in linear models and between five and 22 per cent in logistic regression models. The standard errors are also under-estimated by up to 49 per cent in some countries. Socio-economic variables and service utilisation variables are poorly estimated when the survey design is ignored.
|Item Type:||Monograph (Working Paper)|
|Subjects:||H Social Sciences > HA Statistics
R Medicine > RJ Pediatrics > RJ101 Child Health. Child health services
Q Science > QA Mathematics > QA76 Computer software
|Divisions:||University Structure - Pre August 2011 > Southampton Statistical Sciences Research Institute
University Structure - Pre August 2011 > School of Social Sciences > Social Statistics
|Date Deposited:||11 Jul 2004|
|Last Modified:||03 Mar 2012 18:04|
|Publisher:||Southampton Statistical Sciences Research Institute|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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