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arXiv · 1502.03609

Correcting for non-ignorable missingness in smoking trends

Juho Kopra·Tommi Härkänen·Hanna Tolonen·Juha Karvanen
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Abstract

Data missing not at random (MNAR) is a major challenge in survey sampling. We propose an approach based on registry data to deal with non-ignorable missingness in health examination surveys. The approach relies on follow-up data available from administrative registers several years after the survey. For illustration we use data on smoking prevalence in Finnish National FINRISK study conducted in 1972-1997. The data consist of measured survey information including missingness indicators, register-based background information and register-based time-to-disease survival data. The parameters of missingness mechanism are estimable with these data although the original survey data are MNAR. The underlying data generation process is modelled by a Bayesian model. The results indicate that the estimated smoking prevalence rates in Finland may be significantly affected by missing data.

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Juho Kopra, Tommi Härkänen, Hanna Tolonen, Juha Karvanen. 2015-02-12. Correcting for non-ignorable missingness in smoking trends. https://doi.org/10.1002/sta4.73

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