Why is a case coded as -1 (not applicable) when the question/variable is clearly applicable to that case?
The HSE generally uses standard missing value conventions which are shown below (a few of the variables do not conform to this scheme but the value labels are clearly marked). However, sometimes missing values are coded incorrectly – for example all missing values for the 2002 and 2003 variable WhVal (Waist-hip measurement value) are coded as -1 when they should be coded as either -6 or -7. Missing value conventions on the HSE: -1 Not applicable: Used to signify that a particular variable did not apply to a given respondent usually because of internal routing. For example, men in women only questions. -2 Schedule not applicable: Used mainly for variables on the self-completions when the respondent was not of the given age range, also used for children without legal guardians in the home who could not participate in the nurse schedule. – 6 Schedule not obtained: Used to signify that a particular variable was not answered because the respondent did not complete or agree to a particular s
