CPES logoCollaborative Psychiatric
Epidemiology Surveys

Harmonization of Demographic Variables

Additional recoding was required to harmonize demographics across the three CPES surveys, as a result of the division of the NCS-R instrument into two parts, resulting in NCS-R respondents being asked different sets of demographic questions. Part I of the NCS-R includes sections 1-14 (Household Listing, Screening, Depression, Mania, Irritable Depression, Panic Disorder, Specific Phobia, Social Phobia, Agoraphobia, Generalized Anxiety Disorder, Intermittent Explosive Disorder, Suicidality, Services, and Pharmacoepidemiology). At the conclusion of the Pharmacoepidemiology section, a series of assignments to Part II of the survey were made.

All 9,282 respondents were asked the Part I questions, while a subsample of 5,692 respondents completed Part II. In addition, Part II was administered to Part I respondents with a lifetime disorder, as well as to a probability subsample of other respondents. All sections after Pharmacoepidemiology are considered Part II sections. Part II was further subdivided into long, intermediate, and short forms of the questionnaire. Short-form respondents were asked key demographic questions in the Demographics section. Intermediate- and long-form respondents were asked the same key demographic questions as they appeared in other Part II sections.

In order to get the correct total for each of these demographic variables, data for long-/intermediate-, and short-form variables were combined into one constructed variable that could then be linked to the same demographic variables in NLAAS and NSAL. Note that the NCS-R Part II weight (NCSRWTLG) should be applied when looking at NCS-R combined-variable demographics separate from data from the other studies. The original source variables have been retained in the dataset as well, should an analyst want to use those versions of the variables. The following lists the NCS-R source and combined demographic variables and the NLAAS and NSAL variables to which they have been linked in the CPES dataset.

A list of harmonized demographic variables can be found on pages 38-43 of the Data Processing Notes.