On The Use Of Network Sampling In Diabetic Surveys

Abstract

Diabetic patients' surveys have to deal with the lack of proper formal sampling frames. For survey researches at the community level, often some partial sampling frames such as medical centres or households to which a person is linked are available. These frames can be used to draw a network sample. At a selected household, the adult occupants are asked to report on the occurrence of the characteristics not only in them but also in their siblings. Using this network sampling design, the total number of people with diabetics can be estimated with lower variance than conventional procedures. The design is illustrated by an analysis of the network data of Nafiu (2007) in a survey to estimate the population of diabetic patients in Niger State, Nigeria. Two estimators: Hansen-Hurwitz estimator and Horvitz-Thompson estimator were considered; and the results were obtained using a program written in Microsoft Visual C++ programming language.



Keywords: Graph, Sampling Frame, Households, Hansen-Hurwitz estimator and Horvitz-Thompson estimator

JORIND Vol. 5 (2) 2007: pp. 2-2