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Three decades of follow-up data now point to something parents and clinicians have long suspected: childhood fitness and depression in adulthood are linked. In a longitudinal study tracking participants from childhood into middle age, fitter children grew into adults with measurably lower depression risk, even after accounting for the usual suspects. This was not a […]
Validating mental health questionnaire instruments means proving that they measure what they claim to measure, in the population you intend to use them on. A scale developed and tested in one setting cannot simply be carried into another and trusted. I learned this at close range leading a psychometric validation study of the PHQ-9 and […]
Taimoor Asghar reflects on what studying burnout in medical students taught him about research itself: instruments, trust, and real people.
A statistically significant one-point difference may be real without being large. Here is how to judge effect size, uncertainty, and practical meaning.
A 602-student Pakistani study found good PHQ-9 reliability and useful psychometric performance, while highlighting limits of screening scores.
PHQ-9 and DASS-21 can reveal more than symptom totals, including item performance, symptom patterns, scale structure, and differences between groups.
A Pakistani student study suggests self-worth and concentration symptoms may carry especially useful information when assessing depression.
A Pakistani university study found strong overlap between DASS-21 depression, anxiety and stress, raising important questions about subscale interpretation.