Definition and Diagnosis
Generalized Anxiety Disorder (GAD) is characterized by excessive, hard-to-control worry about a number of everyday events or activities, occurring more days than not for at least six months. The worry is disproportionate to the actual likelihood or impact of the feared event and is accompanied by physical and cognitive symptoms that cause meaningful distress or impairment.
Epidemiology
GAD is one of the most common anxiety disorders, with lifetime prevalence estimates in the general population ranging from roughly 5-9%. It occurs about twice as often in women as in men, and onset can happen at any age, though it frequently begins in early adulthood.
Risk Factors
Risk factors include a family history of anxiety disorders, childhood adversity, temperamental traits such as behavioral inhibition, and chronic exposure to stress. Co-occurring depression or other anxiety disorders also increases the likelihood of a GAD diagnosis.
Symptoms and Subtypes
Core symptoms include restlessness, being easily fatigued, difficulty concentrating, irritability, muscle tension, and sleep disturbance. Individuals often describe the worry as difficult to switch off, spilling across multiple areas of life such as health, work, finances, and relationships.
Diagnosis
Diagnosis is based on clinical interview using criteria such as those in the DSM-5-TR, which require excessive worry on most days for six months along with at least three associated physical or cognitive symptoms. Clinicians also screen for medical conditions and substance use that can mimic anxiety symptoms.
Treatment
First-line treatments include cognitive behavioral therapy (CBT), which targets worry patterns and avoidance behaviors, and medications such as SSRIs or SNRIs. Relaxation training, mindfulness-based approaches, and lifestyle changes like reduced caffeine intake and regular exercise are commonly used alongside these approaches.
Prognosis
GAD tends to be a chronic condition with a waxing and waning course, but many people achieve substantial symptom reduction with consistent treatment. Early intervention and ongoing management of stress are associated with better long-term outcomes.
Reference
Kaplan, H. I., & Sadock, B. J. (2022). Kaplan & Sadock's Synopsis of Psychiatry (12th ed.). Wolters Kluwer.