Depression hides in plain sight. Half of cases in primary care go unrecognized, mostly because nobody asks. The Patient Health Questionnaire family was built to fix that, and its two item version takes under a minute while retaining most of the full instrument’s sensitivity.

The Two Questions

Anhedonia, losing interest or pleasure in things that used to engage you, and depressed mood are the two core gates of the diagnosis. Without at least one of them, major depression cannot be present, which is what makes this pair so efficient. Each scores from zero, not at all, to three, nearly every day, over the past fortnight.

Reading the Score

At the standard cutoff of three, validation work shows sensitivity near eighty percent and specificity in the low nineties for major depression. Scores below three make depression unlikely, while three and above should trigger the full nine item PHQ-9 or a clinical interview, never a prescription on its own. The screen deliberately overincludes, because its job is to miss nobody.

What Follows a Positive

A positive screen opens a conversation about duration, function, sleep, appetite, concentration and safety. Physical mimics get checked too, since thyroid disease, anemia, some medications and grief all produce lookalike states. Most positives resolve into adjustment reactions or mild episodes managed with activation, exercise and therapy rather than medication.

This tool cannot diagnose anyone. Persistent low mood or any thought of self harm deserves prompt contact with a health professional or a crisis line, not a score.

References

• Kroenke K et al. The Patient Health Questionnaire-2, validity of a two item depression screener
• USPSTF Depression and Suicide Risk in Adults, Screening