The Form Before the Conversation: Making Sense of the PHQ-9 in a UK GP Surgery

The PHQ-9 is a nine-item questionnaire that many UK GP surgeries use to screen for and monitor depression. It is short, standardised and, in the right hands, useful. Yet it is also easy to overread. A score is not a diagnosis, and the form is not a substitute for a clinical conversation. Understanding what the tool does—and what it cannot do—can help you use it more effectively, whether you are filling it in before an appointment or discussing the result with a clinician.

What the Nine Items Are Really Asking

Each item on the PHQ-9 corresponds to one of the nine criteria for major depression in the Diagnostic and Statistical Manual of Mental Disorders (DSM). Over the past two weeks, how often have you been bothered by:

1. Little interest or pleasure in doing things
2. Feeling down, depressed or hopeless
3. Trouble falling or staying asleep, or sleeping too much
4. Feeling tired or having little energy
5. Poor appetite or overeating
6. Feeling bad about yourself—or that you are a failure or have let yourself or your family down
7. Trouble concentrating on things, such as reading the newspaper or watching television
8. Moving or speaking so slowly that other people could have noticed—or the opposite, being so fidgety or restless that you have been moving around a lot more than usual
9. Thoughts that you would be better off dead or of hurting yourself in some way

The response options are: not at all (0), several days (1), more than half the days (2), and nearly every day (3). The final question asks how difficult these problems have made it to do your work, take care of things at home, or get on with other people.

The items are not arbitrary. They cover the two core symptoms (low mood and anhedonia) and the associated changes in sleep, energy, appetite, self-worth, concentration and psychomotor activity. Item 9 addresses suicidal thinking. That item is not there to shock; it is there because clinicians need to know.

How the Score Is Read (and Misread)

Scores range from 0 to 27. Common thresholds are:

• 0–4: minimal
• 5–9: mild
• 10–14: moderate
• 15–19: moderately severe
• 20–27: severe

These bands are guides, not verdicts. A score of 10 does not automatically mean you need medication, and a score of 4 does not mean you are fine. The PHQ-9 is a screening and severity measure; it is not a diagnostic instrument. NICE guidance recommends its use in primary care as part of a fuller assessment, not as a replacement for one. The same score can mean different things for different people depending on history, context and functioning.

It is also worth knowing that the PHQ-9 is used in NHS Talking Therapies services to track outcomes. In that setting, the score is one data point among many. It helps services measure whether symptoms are improving, but it does not capture everything that matters—such as relationships, work, meaning or the side-effects of treatment.

When 'Not at All' and 'Nearly Every Day' Both Feel Wrong

British reserve can make the PHQ-9 awkward. Many people under-report symptoms, preferring to say 'not at all' when the truth is closer to 'several days'. Others may feel that 'nearly every day' overstates the case because their symptoms are not constant. The questionnaire asks about the last two weeks, so the best approach is to think about the majority of days in that period. If you are unsure, choose the option that feels most honest, then mention your uncertainty to the clinician. You can also write a note in the margin or ask to discuss the form. The PHQ-9 is not a test you can fail, and there is no advantage to downplaying distress.

What to Ask Next, Depending on Your Score

If your score is high:

• Ask what the score suggests in the context of your history and current circumstances.
• Ask about the range of treatment options: talking therapies, medication, social prescribing, or a combination.
• Ask about safety, especially if item 9 was endorsed. A score above zero on item 9 warrants a direct conversation about suicidal thoughts and support.
• Ask what happens next: referral, wait times, follow-up.

If your score is low:

• Ask whether the score captures your experience. Low scores can still coexist with significant distress, particularly if you have masked or minimised symptoms.
• Ask about other factors: sleep, alcohol, physical health, work stress.
• Ask whether re-screening in a few weeks would be appropriate if things change.

If your score is ambiguous (for example, around the threshold of 10):

• Ask for a fuller clinical interview. The PHQ-9 is a starting point; a GP can explore the pattern and duration of symptoms.
• Ask whether other measures might be useful, such as the GAD-7 for anxiety.
• Ask about physical causes. Thyroid problems, anaemia and sleep apnoea can mimic depression, and a blood test may be warranted.

The Conversation, Not the Number

The PHQ-9 is a tool for structuring a conversation. It helps clinicians ask consistent questions and track change over time. But it cannot capture the full picture. A score is a signal, not a sentence. If you are filling in the form, answer as honestly as you can, and if the options feel inadequate, say so. If you are discussing the result, ask what it means for you—and what the next step should be. The form is the beginning; the conversation is what matters.