Title of Publication: EVALUATION OF QUALITIES OF AGE AND SEX DATA IN THE 2006 NIGERIA CENSUS AND 2008 NIGERIA DEMOGRAPHIC AND HEALTH SURVEY
Author(s): Eleazar C. Nwogu
Year of Publication: 2011
Qualities of age and sex data in the 2006 census and 2008 Nigeria Demographic and Health Survey (NDHS) are discussed in this paper. Both graphical and algebraic methods were applied to evaluate the data. Results of the analyses show that the age and sex data in the 2008 NDHS are still characterised by pronounced preference for the end digits 0 and 5 and avoidance of the end digits 1, 3, 7 and 9. Age shifting and age exaggeration are also pronounced in both the surveys. However, there are indications that data quality has improved substantially over the results from previous surveys in the country. Therefore, a critical appraisal of the cause(s) of persistent poor data quality in Nigeria, education of the populace, greater emphasis on registration of births, adequate training, supervision and remuneration of enumerators, among others have been recommended.
Key Words: Data quality, Myre’s index, Age-sex accuracy index, digit preference, age shifting, age
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