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Before you begin

Rate how much each physical symptom bothered you during the past four weeks. Complete all 15 items to receive the standard PHQ-15 total.

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During the past four weeks, choose how much this symptom bothered you.

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Answer review
Patient Health Questionnaire (PHQ-9) Assessment Score the nine PHQ-9 symptoms, keep functional impact separate, and flag any Item 9 response for direct follow-up regardless of the total.
RAND SF-36 Health Survey (SF-36) Map 36 health responses to eight RAND 0–100 domain scores, keeping the one-year health-change item separate from the current-health profile.
Kessler Psychological Distress Scale (K10) Assessment Measure distress frequency over the past four weeks with K10, compare two published band guides, and review the complete response pattern.
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Physical symptoms often overlap across illnesses, stress responses, medication effects, sleep problems, and ordinary short-term changes. A symptom-burden questionnaire records how much a set of symptoms has bothered someone during a defined period. It can organize a health conversation, but it cannot determine the cause of those symptoms.

The Patient Health Questionnaire-15 (PHQ-15) covers 15 common physical complaints over the past four weeks. The items span pain, gastrointestinal symptoms, cardiopulmonary or autonomic sensations, fatigue and sleep, and reproductive or sexual health. Each answer expresses bother, not frequency, medical seriousness, or proof that a symptom is medically unexplained.

Question What a burden score can show What requires separate assessment
How much did symptoms bother me? A combined self-reported burden over four weeks The cause of each symptom
Which areas stand out? The answers contributing most to the total Diagnosis, examination, and testing
Is this urgent? No urgency judgment Current warning signs and clinical triage

The four-week frame matters. Answering from one unusually good or bad day can distort the intended summary, while mixing several different time periods makes later comparison difficult. A repeat score is most useful when the wording, recall period, and completion conditions stay consistent.

Higher totals represent greater reported symptom burden, not a more certain medical or psychological diagnosis. Low totals do not make an individual symptom harmless, and high totals do not prove that one condition explains every symptom. Sudden or severe symptoms need attention based on their current features, not on the questionnaire total.

PHQ-15 results are informational. They can support personal preparation, primary-care discussion, or research, but they do not replace medical evaluation or establish cause, treatment, disability, eligibility, or emergency urgency.

How to Use This Tool:

Use the same past-four-weeks frame for every item and judge how bothered you were rather than how alarming a symptom seems today.

  1. Select Start assessment, then rate each symptom as Not bothered at all, Bothered a little, or Bothered a lot.
  2. Complete all 15 items and choose Finish assessment. If an answer does not reflect the four-week period, use Edit answers before interpreting the total.
  3. Read the PHQ-15 total score and burden band, then check Answer review for the symptoms that contributed most. The optional answer order and detail settings change the review only, not the score.

Interpreting Results:

The PHQ-15 total ranges from 0 to 30. The displayed bands are Minimal for 0 to 4, Low for 5 to 9, Medium for 10 to 14, and High for 15 to 30. Each lower boundary is inclusive, so totals of exactly 5, 10, and 15 enter the next band.

Use the band as a description of combined bother during the recall period. Review the individual answers as well: two people with the same total may have very different symptom patterns, and one highly concerning symptom can matter even when the total is low.

Do not use the score to decide that a symptom is psychological, medically unexplained, or non-urgent. Seek prompt medical help for warning signs such as severe or persistent chest discomfort, serious breathing difficulty, fainting, sudden severe pain, or another condition that may be an emergency.

Technical Details:

All 15 PHQ-15 items use the same direct 0-to-2 coding and contribute equally. There is no reverse scoring, weighting, normalization, or rounding. A result is produced only after all items are answered.

Formula Core

Let xi be the coded bother response for item i. The PHQ-15 total T is the sum of all 15 item scores:

T = ∑ i=1 15 xi , xi ∈ 0,1,2
Answer Points
Not bothered at all0
Bothered a little1
Bothered a lot2

For example, six answers scored 2, three scored 1, and six scored 0 produce 6 × 2 + 3 × 1 + 6 × 0 = 15 points. The total is therefore in the High band.

Rule Core

Band Lower bound Upper bound Boundary rule
Minimal040 ≤ total ≤ 4
Low595 ≤ total ≤ 9
Medium101410 ≤ total ≤ 14
High153015 ≤ total ≤ 30

The result also organizes item answers into pain, gastrointestinal, cardiopulmonary and autonomic, fatigue and sleep, and reproductive or sexual-health groups for review. Those groups are a page-specific navigation aid, not official PHQ-15 subscales and not separate scored outputs.

Health Limits and Privacy:

Questionnaire bands do not determine the cause, severity, or urgency of any single symptom. Current warning signs and clinical context take priority over the total.

  • Answers stay in the current browser tab during the session and clear on reload or restart.
  • Creating a result link requires confirmation and embeds all 15 responses in an encoded URL fragment.
  • The encoded fragment is not encrypted or access-controlled; anyone with the link may recover the symptom pattern.
  • Review copied or downloaded records before sharing because they may reveal sensitive health information.

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