Educational Disclaimer: This case study is for educational and informational purposes only. It does not constitute medical advice, clinical guidance, or a substitute for professional psychiatric evaluation. All diagnostic criteria referenced are from the DSM-5-TR (APA, 2022). Clinicians should rely on their professional training, direct patient assessment, and current evidence-based guidelines when making diagnostic and treatment decisions.

Clinical Vignette

Patient: "Ms. K," 39-year-old elementary school principal, self-referred reporting 'constant anxiety about everything' for 3 years.

Chief Concern: "I worry about everything, all the time. My health, my children's safety, my job performance, whether we'll have enough money, what people think of me. I can't turn it off. I've been like this for years."

History of Present Illness: Ms. K describes pervasive, uncontrollable worry across multiple domains for approximately 3 years. Her worry is not limited to one topic but cycles through: (1) children's health and safety (checks on them multiple times per night), (2) job performance (rereads emails 5-6 times before sending, reviews decisions for days), (3) finances (despite adequate income, checks bank account 3-4 times daily), (4) health (frequent self-examinations, Googles symptoms), (5) social evaluation (replays conversations analyzing perceived missteps). She estimates she spends 4-5 hours daily in active worry. The worry is accompanied by persistent muscle tension (neck and shoulders), sleep-onset insomnia (mind 'won't shut off'), fatigue, irritability, and difficulty concentrating at work. She cannot identify a precipitating event: 'It just gradually got worse.' She reports that she has 'always been a worrier' but that it crossed from 'manageable' to 'consuming' approximately 3 years ago. She has no history of panic attacks, no specific phobias, and no trauma history.

Past Psychiatric History: No prior psychiatric treatment. Never formally diagnosed.

Family History: Mother: 'a worrier her whole life' (never diagnosed). Brother: treated for panic disorder.

Mental Status Exam: Alert, cooperative, articulate but tense. Sits rigidly. Speech normal rate, slightly pressured. Mood 'anxious.' Affect anxious, constricted. Thought process linear but worry-dominated. Restless (repositions frequently). Muscle tension visible in shoulders. No psychotic symptoms. No depressive symptoms. Insight good.

Step 1: GAD DSM-5-TR Criteria

Criterion A: Excessive anxiety and worry about a number of events or activities, occurring more days than not for at least 6 months.

Worry across 5+ domains (children, work, finances, health, social). Present most days for 3 years (far exceeds 6-month minimum). Self-described as 4-5 hours daily of active worry. MET.

Criterion B: The individual finds it difficult to control the worry.

'I can't turn it off.' Attempts to stop worrying are unsuccessful. Worry persists despite recognition that it is excessive. MET.

Criterion C: ≥3 of 6 associated symptoms: (1) restlessness, (2) easily fatigued, (3) concentration difficulty, (4) irritability, (5) muscle tension, (6) sleep disturbance.

(1) Restlessness: repositions frequently, reports 'can't sit still.' (2) Fatigue: present. (3) Concentration: difficulty at work due to worry intrusion. (4) Irritability: increased, snapping at children. (5) Muscle tension: chronic neck/shoulder tension. (6) Sleep disturbance: sleep-onset insomnia (mind racing). 6 of 6 present. MET (6/6).

Criterion D: Causes clinically significant distress or impairment.

Impaired work performance, disrupted sleep, strained family relationships, self-described as 'consuming.' MET.

Criterion E: Not attributable to substance or medical condition.

No substance use. No thyroid disease. No medical conditions. MET.

Criterion F: Not better explained by another mental disorder.

Worry is not focused on a single domain (excludes social anxiety, panic, health anxiety, OCD). Multi-domain pervasive worry is the hallmark of GAD. MET.

Step 2: Why Adjustment Disorder Is Excluded

Feature GAD Adjustment Disorder (Anxious) This Patient
Precipitant No identifiable precipitant required Requires identifiable stressor within 3 months No precipitant identified: gradual onset
Duration ≥6 months, often years Resolves within 6 months after stressor ends 3+ years, ongoing
Worry scope Multiple domains, pervasive Related to the stressor and its consequences 5+ domains, unrelated to any stressor
Course Chronic, waxing-waning Time-limited, self-resolving Chronic, progressive worsening
Meets full criteria for another diagnosis? Yes (GAD criteria met) No (AD is diagnosed when full criteria are NOT met) Full GAD criteria met

Differential Summary

Adjustment Disorder is excluded by three factors: (1) no identifiable precipitating stressor, (2) duration exceeding 6 months (3 years), and (3) full criteria for GAD are met (Adjustment Disorder is diagnosed only when criteria for a more specific disorder are NOT met). This is GAD.

Diagnostic Formulation

Diagnostic Conclusion

Generalized Anxiety Disorder (F41.1): All 6 DSM-5-TR criteria met. Multi-domain pervasive worry (5+ areas) for 3 years with all 6 associated symptoms. Adjustment Disorder excluded (no precipitant, excessive duration, full GAD criteria met). Treatment: first-line is CBT (cognitive restructuring of worry cognitions + behavioral worry exposure) combined with SSRI (sertraline, escitalopram) or SNRI (venlafaxine, duloxetine). Buspirone is an alternative for patients who cannot tolerate SSRIs/SNRIs.

Teaching Points

  • GAD is characterized by excessive worry across multiple domains that the patient cannot control. The key structural feature is the MULTI-DOMAIN nature: worry about one topic (health only, social only) suggests a different anxiety diagnosis. GAD worry is pervasive and shifts between topics.
  • The 6-month duration criterion distinguishes GAD from transient anxiety responses. Many individuals experience periods of excessive worry during stressful life events. Only when the worry persists beyond 6 months (and is not exclusively related to the stressor) does GAD become the appropriate diagnosis.
  • Adjustment Disorder is a 'residual' diagnosis: it is assigned when emotional/behavioral symptoms develop in response to an identifiable stressor but do NOT meet criteria for a more specific disorder (GAD, MDD, PTSD). If full criteria for GAD or another disorder are met, that disorder takes diagnostic precedence.
  • GAD has high comorbidity with MDD. Clinicians should screen GAD patients for depressive symptoms at every visit. Longitudinal studies show that many individuals with GAD eventually develop comorbid MDD.
  • Muscle tension is the physical symptom most specific to GAD (compared to other anxiety disorders). Chronic tension in the neck, shoulders, and jaw is a somatic marker that should prompt screening for GAD in primary care settings.