A multicenter hypertension trial finds that a small number of blood pressure readings are missing because some laboratory printouts were accidentally destroyed in a flood affecting one storage room. The loss was unrelated to patient characteristics, treatment assignment, or blood pressure values. Which description best fits this missing data mechanism?
- A)Differential misclassification
- B)Confounding
- C)Missing not at random
- D)Missing completely at randomGABARITO
- E)Immortal time bias
Explicação
Data are missing completely at random when the probability of missingness is unrelated to observed or unobserved values in the dataset. Accidental destruction of printouts unrelated to treatment or blood pressure is a classic example. Although precision is red... Ver explicação completa e trilha adaptativa →