Question: You notice the variable 'pain rating' which has a range of 1-10 has a lot of missing values (25% of subjects) and missing values are

You notice the variable 'pain rating' which has a range of 1-10 has a lot of missing values (25% of subjects) and missing values are coded as 9 in your data set of 48 post-op patients. Which of the following is of concern to you?

A. Decreased generalizability

B. The pattern of missing

C. How it is coded and analyzed

D. all of above

E. none of above

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