Understanding Society User Support

Hi

I am trying to work out why there is such a high number of ‘inapplicable’ responses to the GHQ-12 and SF-12 mental component individual questions and summary scores (roughly 960) in the extra 5 minutes sample for wave 3. These participants appear to have answered other subjective questions so it does not seem to be because they did not respond to the individual survey or were a proxy. Could you help me to understand why these participants responses are recorded as ‘inapplicable’ for these questions, rather than ‘missing’, or point me in the direction of the document which explains this?

Many thanks

Natalie