For question 2b of the Berlin Questionnaire, how should we treat the observations that are coded 1(both)?
These observations are examples (there are others) of subjects selecting more than one response for questions when they should have only selected one response. In many situations, this doesn’t affect the Berlin Questionnaire scoring. When it does, take as the subject’s answer the choice they selected that is the most severe for the symptom. • April 18, 2006: Some questions related to data cleaning: • I noticed in some cells, for example row 114 of column 2b (column U) the entry is “1*”. Is there a special meaning for the “*”? The “*” is an error. The entry should be 1. • Is the blue area there to highlight the missing records? Yes, the blue area indicates the missing data. However, there are also missing values that aren’t highlighted. • For the 17th row of the second night RDI, the entry is “~0”. Should it be zero? Yes, it should be zero. • The weight variable is supposed to be in LB as the unit. But there is one observation that was recorded as 74kg, and one 74 year-old subject was r
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