Sleep Disorders in the Elderly

Age-Related Sleep Changes & Overview - Golden Years, Leaden Nights

• Normal aging significantly alters sleep architecture:
  • ↓ Stage N3 (Slow-Wave Sleep/SWS, deep restorative sleep)
  • ↓ REM sleep (dream sleep) duration & percentage
  • ↑ Sleep latency (longer to fall asleep)
  • ↑ Awakenings & wakefulness after sleep onset (WASO)
  • ↑ Daytime napping, often to compensate for poor nocturnal sleep
  • Phase advance: tendency to sleep & wake earlier
• Prevalence: Sleep disorders are common, affecting up to 50% of individuals >65 years.
• Impact: Significant contributor to ↑ morbidity (e.g., falls, cognitive decline, mood disorders) & ↓ Quality of Life (QoL).

⭐ Total sleep time (TST) may decrease slightly (e.g., 6.5-7 hours/night), but time in bed (TIB) often increases in the elderly, leading to reduced sleep efficiency if not managed well.

Key Geriatric Sleep Syndromes - Night's Common Culprits

• Insomnia: Difficulty initiating/maintaining sleep, or early awakening, ≥3 nights/wk for ≥3 months, causing distress/impairment. Types: sleep-onset, sleep-maintenance, late.
• Obstructive Sleep Apnea (OSA): ↑ prevalence. Risks: obesity, male, craniofacial changes (retrognathia), ↑neck circumference. AHI/hr: Mild (5-15), Mod (15-30), Sev (>30).
• Restless Legs Syndrome (RLS): 📌 URGE: Urge to move, Rest worsens, Gets better with activity, Evening/night worse. Assoc: Iron deficiency (check ferritin), uremia.
• REM Sleep Behavior Disorder (RBD): Dream enactment behavior due to loss of REM atonia. Strong predictor of α-synucleinopathies (Parkinson's, LBD).

  ⭐ RBD often precedes Parkinson's disease or Lewy Body Dementia by several years.

• Circadian Rhythm Sleep Disorders (CRSD): E.g., Advanced Sleep-Wake Phase Disorder (ASWPD): early sleep onset & awakening. Irregular Sleep-Wake Rhythm also common in elderly.

Diagnostic Toolkit - Sleep Detective Kit

• Comprehensive Sleep History:
  • 📌 BEARS Mnemonic: (Bedtime, Excessive daytime sleepiness, Awakenings, Regularity, Snoring).
  • Sleep Diaries: 2-week log.
  • Actigraphy: Objective sleep-wake patterns.
• Screening Tools:
  • Epworth Sleepiness Scale (ESS): Daytime sleepiness (Score >10).
  • STOP-BANG: OSA risk (Score ≥3 high risk).
  • Insomnia Severity Index (ISI): Insomnia (Score >14 clinical).
• Polysomnography (PSG) Indications:
  • Suspected Obstructive Sleep Apnea (OSA), REM Sleep Behavior Disorder (RBD), Periodic Limb Movement Disorder (PLMD).
  • Unexplained hypersomnia.
• Differential Diagnosis:
  • Medical: Pain (e.g., arthritis), nocturia, Heart Failure, COPD.
  • Psychiatric: Depression, anxiety disorders.
  • Medications: Polypharmacy (review list).
  • Substance Use: Alcohol, caffeine.

⭐ Polypharmacy is a major contributor to sleep problems in the elderly; always review medication lists.

Treatment Pathways - Restoring Nightly Peace

• Non-Pharmacological First (Cornerstone):
  • Sleep Hygiene Education: Consistent sleep-wake cycle, limit daytime naps, avoid stimulants before bed, create a restful environment.
  • Cognitive Behavioral Therapy for Insomnia (CBT-I): Includes stimulus control, sleep restriction, relaxation techniques, cognitive restructuring. Highly effective.

    ⭐ CBT-I is the first-line treatment for chronic insomnia in older adults and is more effective long-term than medications.

• Pharmacological Management (Cautious & Short-Term):
  • Principles: "Start low, go slow." Use lowest effective dose for shortest duration. Regularly reassess need.
  • Risks in Elderly: ↑Falls, fractures, cognitive impairment, daytime sedation, delirium.
  • Preferred Agents (if necessary):
    • Non-Benzodiazepines (Z-drugs): e.g., Zolpidem (start ≤5mg).
    • Melatonin: (0.5-2mg) for sleep-onset difficulties.
    • Low-dose Doxepin: (3-6mg) for sleep maintenance.
  • ⚠️ Avoid: Long-acting Benzodiazepines, anticholinergics (e.g., diphenhydramine), first-generation antihistamines.
• Management of Other Specific Sleep Disorders:
  • Obstructive Sleep Apnea (OSA): Continuous Positive Airway Pressure (CPAP), lifestyle changes (weight loss, positional therapy).
  • Restless Legs Syndrome (RLS): Dopamine agonists (e.g., pramipexole, ropinirole), iron supplementation if ferritin is low.
  • REM Sleep Behavior Disorder (RBD): Melatonin (first-line, up to 10-12mg), Clonazepam (0.25-1mg) if melatonin is ineffective or contraindicated.

High‑Yield Points - ⚡ Biggest Takeaways

• Normal aging: ↓ total sleep, ↑ latency & awakenings, ↓ SWS, advanced sleep phase.
• Insomnia: Most common; CBT-I first-line; avoid long-term BZDs (falls, cognitive risks).
• RLS: Leg urge, worse at night; check iron; dopamine agonists.
• RBD: Dream enactment; strong link to α-synucleinopathies (e.g., Parkinson's); clonazepam.
• OSA: Snoring, daytime sleepiness; ↑ CV risk; CPAP treatment.
• ASWPD: Early sleep/awakening; bright light therapy.
• Medication review crucial due to polypharmacy effects on sleep.