Chronic Insomnia Disorder

A persistent pattern of sleep initiation or maintenance difficulty, driven by conditioned hyperarousal and maladaptive behaviors.

The 3P Model of Insomnia

Spielman's 3P model is the dominant framework for understanding how acute insomnia transitions into a chronic state:

1. Predisposing Factors Traits that make an individual vulnerable, such as genetic predisposition, hyper-reactivity to stress, or perfectionism.
2. Precipitating Factors The trigger that initiates the acute bout of insomnia (e.g., job loss, grief, medical illness, newborn baby).
3. Perpetuating Factors The behaviors that keep the insomnia going long after the precipitating event has resolved (e.g., spending excessive time in bed, worrying about sleep, napping).

Clinical Diagnosis

Chronic insomnia is diagnosed when sleep difficulties occur at least 3 nights per week and persist for at least 3 months, despite adequate opportunity for sleep, causing significant daytime impairment.

First-Line Treatment: CBT-I

The American College of Physicians (ACP) recommends Cognitive Behavioral Therapy for Insomnia (CBT-I) as the initial treatment for all adult patients.

While hypnotic medications (Z-drugs, benzodiazepines) provide acute relief, they do not address the perpetuating factors and carry risks of dependency, tolerance, and rebound insomnia.