What does a Cleveland Adolescent Sleepiness Questionnaire (CASQ) score of 47 (out of 64) indicate?

Cleveland Adolescent Sleepiness Questionnaire Score of 47: Interpretation

A CASQ score of 47 out of 64 indicates significant excessive daytime sleepiness in this adolescent, placing them in the upper range of problematic sleepiness that warrants immediate evaluation for underlying sleep disorders and implementation of sleep hygiene interventions.

Understanding the Score

The Cleveland Adolescent Sleepiness Questionnaire (CASQ) is a validated 16-item self-report instrument specifically designed to measure excessive daytime sleepiness in adolescents aged 11-17 years 1. The scale ranges from 16 to 64, with higher scores indicating greater levels of daytime sleepiness 1.

Your patient's score of 47 represents approximately 73% of the maximum possible sleepiness score, which is clinically significant and concerning for several reasons:

• This score indicates the adolescent is experiencing problematic sleepiness across multiple domains measured by the CASQ's four-factor structure 1
• Research demonstrates that as CASQ scores increase, there is a corresponding increase in the frequency of feeling sleepy during the day, sleepiness both in and out of school, and difficulty waking up rested in the morning 2
• Higher CASQ scores correlate with impaired executive functioning, particularly working memory deficits 3

Clinical Implications and Associated Risks

This level of sleepiness places the adolescent at risk for multiple adverse outcomes that directly impact morbidity, mortality, and quality of life:

Academic and Cognitive Impact

• Impaired school performance due to reduced alertness in the classroom environment 4
• Working memory and inhibition control deficits that interfere with learning 3
• Increased tardiness and school absences 4

Mental Health Concerns

• Increased depressive symptoms and suicidal ideation 4
• Evening chronotype individuals with high sleepiness scores show significantly higher depression levels 5
• Compromised psychological well-being 4

Physical Health and Safety Risks

• Increased motor vehicle accident risk - particularly critical as motor vehicle crashes account for 35% of all adolescent deaths 4
• Greater risk of athletic injuries 4
• Increased risk-taking behaviors 4
• Associations with obesity, metabolic dysfunction, and cardiovascular morbidity 4

Immediate Action Steps

1. Assess Sleep Duration and Patterns

Determine if the adolescent is obtaining the recommended 8-10 hours of sleep per 24 hours 4:

• Calculate school-night sleep duration
• Calculate non-school night sleep duration
• Determine "sleep debt" (difference between weekend and weekday sleep) 1
• Most U.S. high school students (68.4%) sleep ≤7 hours on school nights, which is insufficient 4

2. Evaluate for Medical Sleep Disorders

This score warrants screening for underlying sleep pathology 6:

• Sleep-disordered breathing/sleep apnea
• Narcolepsy (rare but serious)
• Restless leg syndrome
• Circadian rhythm disorders (delayed sleep-wake phase disorder is common in adolescents)

If medical sleep disorders are suspected, refer for nocturnal polysomnography and objective testing (MSLT, MWT) in collaboration with the adolescent's physician 6.

3. Address Environmental and Behavioral Factors

Implement evidence-based sleep hygiene practices immediately 4:

• Cool, dark, quiet sleep environment
• Consistent bedtimes and wake times on both weekdays and weekends
• Regular bedtime routine
• Morning light exposure upon awakening
• Eliminate sleep-disrupting electronic devices near bedtime

4. School Start Time Considerations

If the adolescent attends a school with early start times (before 8:30 AM):

• Advocate for later school start times of 8:30 AM or later 4
• Early start times work contrary to adolescent circadian physiology, where teenagers typically cannot fall asleep before 11:00 PM due to delayed melatonin secretion 4
• A teenager sleeping at 11:00 PM needs to sleep until at least 7:30 AM to obtain sufficient sleep 4

Common Pitfalls to Avoid

• Do not dismiss this as "normal teenage behavior" - a score of 47 indicates pathological sleepiness requiring intervention
• Do not focus solely on bedtime - adolescents have biologically delayed circadian rhythms that make early sleep onset difficult 4
• Do not overlook gender differences - females may have poorer sleep patterns and higher depression levels at equivalent CASQ scores 5
• Do not assume adequate sleep opportunity equals adequate sleep - even with later school start times, targeted education about sleep importance is necessary 4

Monitoring and Follow-up

The CASQ can be re-administered after interventions to track improvement 2. The scale has demonstrated good internal consistency (α = 0.89) and is reliable for repeated measurements 1. Target a reduction in score to below 35-40 range with interventions, though specific clinical cutoffs have not been definitively established in the literature.