Depression Screening Score (PHQ-Simplified) Formula

Understand the math behind the depression screening score (phq-simplified). Each variable explained with a worked example.

Use the Depression Screening Score (PHQ-Simplified)

Formulas Used

Depression Score

total_score = interest + down + sleep_trouble + tired + concentration

Max Possible Score

severity_max = 15

Variables

VariableDescriptionDefault
interestLittle interest or pleasure in things (0-3)1
downFeeling down, depressed, or hopeless (0-3)1
sleep_troubleTrouble sleeping or sleeping too much (0-3)1
tiredFeeling tired or having little energy (0-3)1
concentrationTrouble concentrating (0-3)0

How It Works

Depression Screening

This simplified tool is inspired by validated depression questionnaires. It is NOT a diagnostic tool.

Scoring Guide

| Score | Severity | |---|---| | 0-4 | Minimal depression | | 5-9 | Mild depression | | 10-14 | Moderate depression | | 15 | Severe depression |

Important

If you are experiencing thoughts of self-harm or suicide, please contact the 988 Suicide and Crisis Lifeline by calling or texting 988. You are not alone.

Worked Example

Rating each symptom over the past two weeks.

interest = 1down = 1sleep_trouble = 1tired = 1concentration = 0
  1. 01Interest = 1, Down = 1, Sleep = 1
  2. 02Tired = 1, Concentration = 0
  3. 03Total = 4 (Minimal depression)

Ready to run the numbers?

Open Depression Screening Score (PHQ-Simplified)