What a screening score means — and what it doesn't

Screening is a specific statistical tool

A screening questionnaire is a brief instrument, validated in research, that estimates how strongly your recent experiences match a pattern studied under a label — depression symptoms, generalized anxiety, attention differences, trauma responses. Validation means: in studied populations, the instrument reliably separates people likely to meet full diagnostic criteria from people unlikely to. That is a population-level property. Your individual result is a data point, not a conclusion.

What a score can tell you

• Pattern strength. How many symptoms, at what intensity, over the defined recall period.
• Direction for attention. Elevated screens are most useful as prompts: "look here, with a professional, in context."
• A baseline for change. A dated, dated-instrument score you can compare with a future score from the same instrument — trends over time are where screening data becomes genuinely informative.
• Language for conversation. "My PHQ-9 came out in the moderately severe range" is a precise opening line for a doctor.

What a score cannot tell you

• Why. Depression, grief, burnout, hypothyroidism, anemia, PTSD, and chronic pain can all elevate the same PHQ-9. The score does not know which.
• Context. Severity, impairment, and clinical significance — the actual diagnostic criteria — require a clinician's interview.
• Comorbidity structure. Screens overlap; the correlations between PHQ-9 and GAD-7 scores reflect the real-world entanglement of depression and anxiety, not two separate facts about you.
• You. A questionnaire samples a slice of experience over two weeks. You are not the slice.

The rules of thumb clinicians use

1. Screens are followed by assessments, never by self-verdicts. A positive screen means "get the full assessment," not "you have the disorder."
2. Single scores are weak; patterns are strong. One result is a snapshot; repeated results on the same instrument, same version, tell a story.
3. Function beats number. The clinically important question is never "what's my score?" but "what is this doing to my life?"
4. The recall period matters. A score is a statement about the last two weeks (or month, or year, per instrument). It is not a statement about your character.

The honest summary

Take screenings seriously — they are validated instruments that detect real patterns. Take them lightly — they are not diagnoses, not identities, and not prophecies. The best use of a screening result is the moment after you close the results page: what will you do with the information, and with whom will you talk about it?