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Inventory of Depressive Symptomatology (IDS-C30)

IDS-C30: Clinical Inventory of Depressive Symptomatology. A comprehensive 30-item clinician-rated instrument for MDD severity.

Clinician Assessment — Item 1/30

Sleep Onset Insomnia

Guidelines & Evidence

Verified

Last Review: 2026-07-17

When to Use

Clinical Utility

Clinician-rated assessment of depression severity in MDD

Evaluation of atypical, melancholic, and anxious features of depression

Standardized monitoring of treatment efficacy in tertiary psychiatric care

Assessment of depressive symptoms in patients with comorbid medical conditions

How it Works

Scoring Rules

The IDS-C30 consists of 30 clinician-rated items. Items are scored 0–3. Total score ranges from 0 to 82 (some items are mutually exclusive such as increased/decreased appetite). Highly correlated with the Hamilton Rating Scale for Depression (HRSD).

Interpretation

0–11 points	Normal / Non-depressed
12–23 points	Mild Depression
24–36 points	Moderate Depression
37–46 points	Severe Depression
47–84 points	Very Severe Depression

Last Comprehensive Review: 2026-07-17