Patient Health Questionnaire (PHQ)- Nigeria

Information about Measure
First Name Abiodun
Last Name Adewuya
Email Not Available
Affiliation Obafemi Awolowo University
Other means of contacting author (e.g., website, Academia.edu, ResearchGate) https://www.researchgate.net/profile/Abiodun_Adewuya
Mental health assessment tool that was adapted/developed/validated Patient Health Questionnaire (PHQ-9) in Nigeria
Mental health condition assessed Depressive disorders
Idiom of distress included, if any Not Applicable
Lifestage of interest Adult (General)
Age range (age – age) 15-40
Country or countries where tool was developed/adapted/validated Nigeria
Language(s) of the adapted/developed/validated tool English
Clinical or community sample? Community
Subpopulation in which tool was developed/validated (e.g., tool was developed and tested among middle-class women)? Tested among university students
Development procedures validated
If validated, what was the gold standard? Validated against DSM-IV diagnosis by a clinician
Description of other development procedures, if applicable
Cronbach’s alpha 0.85
Sensitivity 0.897
Spec 0.989
Other information about tool (e.g., additional psychometrics [NPV, PPV, Youden’s index, diagnostic odds ratio]) The psychometric properties recorded for this entry refer to the items that assess minor depressive disorder. Additional psychometrics include: PPV of 0.875, NPV of 0.981, and overall correct classification (OCC) rate of 0.973 all using an optimal cut-off score of 5. For major depressive disorder, the optimal cut-off score was determined to be a 10 and had a sensitivity of 0.846, specificity of 0.994, PPV of 0.750, NPV of 0.996, and OCC of 0.992.
Links to development/adaptation/validation studies and/or previous studies using the tool NA
Notes when administering the tool The PHQ is a 9 item scale that is scored on a point system from 0-3 and all items are summed with equal weight, giving a maximum score of 27. As noted above, optimal cut-off scores were determined to be a 5 for minor depressive disorder and a 10 for major depressive disorder. Since the sample population was well-educated, trained research assistants provided them with a written copy of the scale. Sample literacy should be considered in all future studies.