Validity of proxy data obtained by different psychological autopsy information reconstruction techniques

Area of Science:

• Psychological autopsy methodology
• Psychometrics
• Epidemiology

Background:

• Psychological autopsy studies rely on proxy data to reconstruct information about deceased individuals.
• Evaluating the validity of different proxy data reconstruction techniques is crucial for accurate study findings.
• Living controls were used as a gold standard to assess proxy data accuracy.

Purpose of the Study:

• To evaluate the validity of proxy data obtained through seven psychological autopsy information reconstruction techniques.
• To compare the accuracy of different reconstruction techniques against living controls' self-reports.
• To determine if using a second informant enhances information reconstruction.

Main Methods:

• A case-control psychological autopsy study was conducted in China.
• Two informants were interviewed for each of 416 living controls.
• Seven psychological autopsy information reconstruction techniques (types 1, 2, A-E) were assessed using living controls' self-reports as the gold standard.

Main Results:

• Proxy data from reconstruction technique types 1, 2, and D for impulsivity were comparable to self-reports.
• Proxy data from types A and E for impulsivity were significantly lower than self-reports.
• For coping mechanisms, types 1 and D showed no significant difference from self-reports, while types 2, A, and E were lower.

Conclusions:

• The validity of proxy data varies depending on the reconstruction technique and the psychological construct being measured.
• Using a second informant does not consistently enhance information reconstruction accuracy in psychological autopsy studies.
• Findings suggest careful selection of reconstruction techniques is necessary for reliable proxy data in psychological research.