Psychological Factors Affecting Other Medical Conditions: DSM-5 Pediatric Monograph

Definition and DSM-5 criteria

Psychological factors affecting other medical conditions (PFAMC) describes a situation in which a child has a genuine, established medical condition whose course, treatment or outcome is adversely affected by psychological or behavioural factors. Unlike somatic symptom disorder, the focus here is not an excessive response to symptoms but the demonstrable, harmful impact of psychology on a real disease — for example, anxiety worsening asthma control, or non-adherence undermining diabetes management.

The DSM-5 criteria are:

• Criterion A — a medical symptom or condition (other than a mental disorder) is present.
• Criterion B — psychological or behavioural factors adversely affect the medical condition in one of the following ways:
  1. The factors have influenced the course of the condition (a close temporal association between the factors and the development, exacerbation or delayed recovery).
  2. The factors interfere with treatment (e.g. poor adherence).
  3. The factors constitute additional, well-established health risks.
  4. The factors influence the underlying pathophysiology, precipitating or exacerbating symptoms or necessitating medical attention.
• Criterion C — the psychological/behavioural factors are not better explained by another mental disorder (e.g. panic disorder, major depression, somatic symptom disorder).

Severity is specified as mild, moderate, severe or extreme by the degree of medical risk conferred.

Clinical features

In paediatrics PFAMC is common and high-stakes in chronic disease: an adolescent with diabetes omitting insulin amid family conflict, a child whose asthma flares with stress or whose attacks are amplified by panic, deliberate manipulation of a chronic illness, or denial that delays care. The factors span emotional states (anxiety, depression, stress), maladaptive health behaviours (non-adherence, denial, risk-taking), and personality or coping styles. Caregiver beliefs and family dynamics are frequently the operative factor in younger children.

Diagnosis

PFAMC is a positive diagnosis requiring (1) a confirmed medical condition and (2) evidence that psychological or behavioural factors are materially worsening it — distinguished from a mental disorder caused by the condition, and from somatic symptom disorder (where the problem is the disproportionate response, not an organic disease being made worse). Identify the specific factor and the specific pathway (course / treatment / risk / pathophysiology), because that targets the intervention.

See the full criteria: Psychological Factors Affecting Other Medical Conditions

Red flags

• Recurrent, preventable admissions or DKA/status asthmaticus episodes tracking with non-adherence — escalate psychosocial support
• Deteriorating control of a chronic condition during family conflict, abuse, or mental-health crisis
• Deliberate disease manipulation or insulin omission as self-harm — assess suicidality
• Caregiver beliefs or behaviours obstructing necessary treatment — consider safeguarding if the child is endangered
• A new mental disorder (depression, eating disorder) driving the deterioration — diagnose and treat it in its own right

Management overview

Effective care is integrated and collaborative, addressing the medical condition and the psychological factor together rather than sequentially. Begin by validating the child’s and family’s experience and framing the psychological factor as a modifiable contributor — not blame. Identify the precise pathway: if adherence is the issue, use behavioural and family-based adherence interventions; if anxiety or depression is worsening the disease, treat it with appropriate psychological therapy; if family dynamics or beliefs are operative, engage the family.

Management is multidisciplinary — the treating paediatric specialist working alongside psychology, social work and the school. Motivational interviewing, structured adherence support, stress and self-management training, and treatment of comorbid mental disorders are the mainstays. Coordinate so the child does not receive conflicting messages, and review outcomes against concrete disease markers (e.g. HbA1c, admission frequency). Early identification prevents avoidable morbidity from an otherwise manageable condition.

References

1. American Psychiatric Association. DSM-5-TR. 2022.
2. Levenson JL. Psychological factors affecting other medical conditions. UpToDate. 2024.
3. Dimsdale JE, et al. Somatic symptom disorder: an important change in DSM. J Psychosom Res. 2013;75(3):223–228.

Decision support for qualified clinicians only — verify against current primary guidelines and your clinical judgement.