Insomnia - Definitiion and Diagnosis

What is the difference between insomnia and sleep deprivation?

  • Sleep deprivation is defined as having the ability to sleep but not giving oneself sufficient opportunity – such as working excessive hours or simply going to bed to late and rising early. 
  • Insomnia means giving oneself sufficient time to sleep but not being able to sleep for long enough.

What is the difference between acute and chronic insomnia?

  • Acute insomnia is a temporary condition, usually in relation to stressful events happening in life.
  • Chronic insomnia is defined by having sleeping poorly three or more times per week, over a three month period.

What is the diagnosis of insomnia?

  • Dissatisfaction with the sleep quantity or quality
  • Difficulty initiating sleep, or
  • Difficulty maintaining sleep, or
  • Early morning awakening, or
  • Non-restorative sleep
  • Poor sleep three or more times per week over a three month period
  • Significant distress or impairment in daytime functioning, indicated by at least one of the following:
    • Fatigue or low energy
    • Difficulty with concentration, memory, paying attention or mental functioning
    • Mood disturbance, e.g. irritability, unease or dissatisfaction
    • Behavioural problems, e.g. hyperactivity, impulsivity, aggression
    • Impaired mental functioning at work or school
    • Impact on family functioning, including sleep disturbance for others
    • Reports from caregivers and family/friends


Severn Sleep is the first dedicated CBTi sleep clinic in Shropshire, Powys and Worcestershire. Appointments are available at our clinics in Brecon, Ludlow, Shrewsbury and Worcester. Alternatively, we offer appointments via Skype to clients across the UK and rest of the world.

Please Call Severn Sleep on: 07799 625628