Figure 7.
Directed acyclic graph illustrating independent, nondifferential misclassification of both influenza and vaccination status. True influenza status I may be misclassified I* due to the effects of factors which contribute to the measurement of influenza status UI. True vaccination status V may be misclassified V* due to the effects of factors which contribute to the measurement of vaccination status UV. C indicates other confounders of V→I and in this graph are assumed to be independent of I* and V*.