Insomnia is a common sleep disorder that significantly affects an individual’s ability to fall asleep, stay asleep, or experience restorative sleep. Its prevalence, varied presentations, and multifactorial aetiology necessitate a thorough understanding to ensure effective management.
The prevalence of insomnia varies globally, with estimates indicating that approximately 10-30% of adults experience symptoms, and about 10% meet the criteria for chronic insomnia. These rates are higher among older adults and females. The variability in reported rates can be attributed to differences in diagnostic criteria, assessment methods, and population characteristics.
According to the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5), the key symptoms of insomnia include difficulty initiating sleep, difficulty maintaining sleep, and early-morning awakening with an inability to return to sleep. For a diagnosis, these symptoms must occur at least three nights per week for a minimum of three months and cause significant distress or impairment in social, occupational, or other important areas of functioning.
The International Classification of Sleep Disorders, Third Edition (ICSD-3), similarly emphasizes symptoms along with the significant distress or impairment to health, well-being, or daytime functioning.
Treatment of insomnia is multifaceted, often involving a combination of pharmacological and non-pharmacological approaches.
Insomnia is a common sleep disorder that affects a person’s ability to fall asleep, stay asleep, or achieve restorative sleep. It affects approximately 10–30% of adults worldwide, with around 10% meeting the criteria for chronic insomnia. It is more prevalent in older adults and women.
The primary symptoms of insomnia include difficulty falling asleep, staying asleep, or waking up too early and being unable to return to sleep. For a diagnosis of chronic insomnia, these symptoms must occur at least three times a week for three months and cause distress or impairment in daily functioning.
Insomnia is diagnosed using criteria from the DSM-5 and ICSD-3, which focus on persistent sleep difficulties and their impact on daytime functioning. A thorough clinical assessment helps determine the type, duration, and impact of insomnia symptoms.
The most effective treatment for insomnia is Cognitive Behavioral Therapy for Insomnia (CBT-I). It targets the thoughts and behaviours that maintain chronic insomnia and includes techniques like sleep restriction, stimulus control, and relaxation training.
Medications can be useful in managing insomnia, especially when symptoms are severe or other treatments haven’t worked. However, they are usually recommended short-term and are best used alongside non-pharmacological approaches like CBT-I for long-term success.
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