Calculators & Tools

Persistent Depressive Disorder (Dysthymia)

DSM-5 criteria - depressed mood for most of the day, more days than not, ≥1 year in children.

1 What is the Persistent Depressive Disorder (Dysthymia)?

The Persistent Depressive Disorder (Dysthymia) is a psychosocial scoring tool used in paediatric practice. DSM-5 criteria - depressed mood for most of the day, more days than not, ≥1 year in children. It scores 6 criteria and interprets the total across 2 bands, so the number always arrives with the severity it implies rather than on its own. In PediAid each criterion is shown as a labelled option with the weight it carries, so the total can be checked rather than taken on trust.

2 When to use it

  • Grading severity at the bedside in psychosocial
  • Recording an objective severity band in the case notes
  • Deciding when a total crosses the threshold for escalation
  • Re-scoring to track whether a child is improving or deteriorating
  • Checking the exact criteria of a score used infrequently

3 Formula & method

The score sums 6 criteria: Poor appetite or overeating; Insomnia or hypersomnia; Low energy or fatigue; Low self-esteem; Poor concentration or difficulty making decisions; Feelings of hopelessness. Totals are then banded: any score - Below threshold: fewer than 2 accompanying symptoms; 2 criteria met or more - Threshold met: ≥2 symptoms alongside depressed/irritable mood for ≥1 year (children & adolescents; ≥2 years in adults), never symptom-free >2 months.
  • DSM-5 threshold: 2 or more of the 6 criteria listed.
  • A diagnosis also requires clinically significant distress or impairment, the required duration, and exclusion of substance use or another condition. Screening aid only - not a diagnosis.

4 Frequently asked questions

How many criteria does the Persistent Depressive Disorder (Dysthymia) use?

6. They are Poor appetite or overeating; Insomnia or hypersomnia; Low energy or fatigue; Low self-esteem; Poor concentration or difficulty making decisions; Feelings of hopelessness.

What do the bands of the Persistent Depressive Disorder (Dysthymia) mean?

The total is interpreted as: any score - Below threshold: fewer than 2 accompanying symptoms; 2 criteria met or more - Threshold met: ≥2 symptoms alongside depressed/irritable mood for ≥1 year (children & adolescents; ≥2 years in adults), never symptom-free >2 months.

Does the score replace clinical judgement?

No. It is a structured way to record and communicate severity. A clinician concerned about a child should act on that concern regardless of the total.

Where does this score come from?

DSM-5 threshold: 2 or more of the 6 criteria listed.

Does it work offline?

Yes. Score definitions are bundled with the PediAid app, so the score computes without a connection.

For qualified clinicians. This page and the PediAid app are a clinical aid only. Calculations and reference data must be verified against the patient's clinical context, the source guideline and your local protocols before any treatment decision is made.