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Transcript
What happens in the 1958 cohort? ï§ We know that the missing data generating mechanism is not MCAR ï§ For the majority of research scenarios CCA will either be biased and/or inefficient ï§ CCA probably OK if outcome and exposure up to age 11 ï§ Missing data generating mechanism is either MAR on MNAR ï§ Both untestable â rely on unverifiable assumptions ï§ MAR vs MNAR related to omitted variable bias/unmeasured confounding bias ï§ In the majority of research scenarios in the 1958 cohort a principled approach to the analysis of incomplete records is needed
