The objective of my research is to find out the relationship between the level of mental health status and quality of life. I am using PHQ-9 to test level of mental health status and WHOQOL-BREF for quality of life. The problem is, whoqol-bref only have score for 4 dimensions separately and since there's no total score for WHOQOL-BREF, I am confused on how to find the relationship between the two variables. Is there any possible way to correlate them?
The WHOQOL-BREF does not have a total score because quality of life is not a single dimension. Variables may show different relationships with the different domains of quality of life. So don't be in a rush to get a single outcome variable!
That said, question 1 is a good overall question, frequently used as a single item measure of quality of life (I've used it myself!). You can model this using ordered logistic regression.
I completely agree with Ronán Michael Conroy . WHOQOL-BREF has no single score as it is premised on the fact that QoL is multidimensional. Although there are tools that provide a single value, this tool does not.
You can do the following:
- You can compare the mean QoL score and its domains between dichotomous variables (gender, marital status, place of residence etc.)
- Depending on your hypotheses and nature of data, you may conduct the ANOVA test to determine the differences across age groups, education levels, physical activity etc.
- The Mann‐Whitney U and Kruskal–Wallis tests could be used when parametric test assumptions are not applicable
- Regression analysis can be employed.
Hope this is helpful.
With Best Regards,
Apurva
Thank you so much @Apurva Kumar Pandya. It was really helpful
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