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Support #2225

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SF-12 missingness wave 2

Added by Verena Schneider 12 days ago. Updated 12 days ago.

Status:
Feedback
Priority:
Normal
Category:
Data documentation
Start date:
03/14/2025
% Done:

50%


Description

Hi,

I noticed there is quite a substantial amount of missingness (-9) on the derived SF12 physical and mental component summaries (sf12pcs_dv and sf12mcs_dv). This is 7.72% vs <1% in other waves.
Looking at the single items, this seems to be due to a substantially higher number of respondents coded as don't know (-1). These are in the hundreds and thousands at wave 2. For example, 2,063 are coded don't know (-1) on b_scsf3b.

Could you shed some light on why this is?

Many thanks and best wishes,
Verena

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