CPES logoCollaborative Psychiatric
Epidemiology Surveys

Missing Data Codes

The CPES dataset uses the following missing data codes:

  • -7 Missing (Other)
  • -8 Don't Know
  • -9 Refused

"Missing (Other)" generally is used for numeric questions for which interviewers were instructed to enter a special code for responses that did not fall within a valid code range, for example, "97" for "DOES NOT APPLY" in response to a frequency question that allowed for a two-digit response. In the public release dataset all such responses have been changed to "-7". The following table summarizes questions for which this missing data code applies.

A list of the original responses recoded to Missing (Other) can be found on pages 78-88 of the Data Processing Notes.