Northern Ireland Longitudinal Study

The Northern Ireland Longitudinal Study (NILS) is a large-scale, representative data-linkage study created by linking data from the Northern Ireland Health Card Registration system to the 1981, 1991, 2001 and 2011 Census returns and to administrative data from other sources such as births, deaths and marriages. The result is a 30 year plus longitudinal data set which is regularly being updated. The sample is - c. 28% of the Northern Ireland population (approximately 500,000 individuals and accounting for approximately 50% of households). It is designed for statistics and research purposes only and is managed by Northern Ireland Statistics and Research Agency under Census legislation. The NILS offers the potential to look at a wide range of important social and epidemiological issues including occupational mortality; fertility change; family structure; women’s occupations; geographical and social inequalities in health; social mobility; and the health of ethnic minorities and religious groups. All research carried out on the NILS database must be related to health and social care.
Northern Ireland Longitudinal Study
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Data linking study