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Subjective sleepiness and objective sleep propensity do not closely align in adults with ADHD referred for sleep evaluation

In adults with ADHD referred for MSLT, subjective sleepiness (ESS scores) did not correlate with objective sleep propensity (mean MSLT sleep latency), while a significant inverse correlation was observed in the EDS-only subgroup. Median ESS scores were similar between groups (14.0 vs 13.0), but objective sleep latency was longer in the ADHD group (432.0 s vs 322.0 s, p=0.008) and MSLT positivity was less frequent (61.8% vs 87.1%, p=0.001).

Last updated: Jul 24, 2026•0 RCTs•📖 Read as article →

Evidence Score

Evidence Score32/100
Human RCT☆☆☆☆☆
Meta-analysis☆☆☆☆☆
Mechanism★★★★★
Safety★★★★☆
Confidencelow

Study Evidence

Study 1. Subjective sleepiness and objective sleep propensity in adults with attention-deficit/hyperactivity disorder referred for multiple sleep latency testing.

observational

Uchida S, Maruo T, Takagi S, Sugihara G, Takahashi H · Frontiers in psychiatry (2026)

Participants: N/A
Duration: N/A (retrospective, single year 2021)
Intervention: None (observational study comparing ADHD group to EDS-only group)
Outcome: Subjective sleepiness (Epworth Sleepiness Scale score), objective sleep propensity (mean MSLT sleep latency), MSLT positivity (≤480 s), SOREMP frequency
Effect Size: N/A
Population: Adults aged 18+ referred for MSLT evaluation (68 with ADHD, 62 with EDS without ADHD)

Result:

PubMed: 42445547DOI: 10.3389/fpsyt.2026.1848254

Mechanism Graph

ADHD patients report subjective sleepiness
↓
Objective sleep propensity measured by MSLT shows longer latencies in ADHD
↓
No significant correlation between ESS and MSLT in ADHD group
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Subjective-objective dissociation suggests need for integrated assessment

Limitations

  • ⚠Retrospective cross-sectional design limits causal inference
  • ⚠Clinical referral population may not generalize to all adults with ADHD
  • ⚠No control for medication effects or comorbid sleep disorders

Frequently Asked Questions

Does the Epworth Sleepiness Scale accurately reflect objective sleepiness in adults with ADHD?▼

No, the study found no significant correlation between ESS scores and mean MSLT sleep latency in the ADHD group, suggesting subjective complaints may not match objective measures.

How do objective sleep measures differ between ADHD and non-ADHD patients with excessive daytime sleepiness?▼

Adults with ADHD had significantly longer mean sleep latency (432 s vs 322 s) and lower rates of MSLT positivity (61.8% vs 87.1%) compared to the EDS-only group.

What is the clinical implication of this study for ADHD patients reporting daytime sleepiness?▼

The findings support the need for integrated psychiatric and sleep-medicine assessment, as subjective sleepiness may not align with objective sleep propensity in this population.

What was the sample size and study design?▼

This was a retrospective cross-sectional study of 130 adults (68 ADHD, 62 EDS-only) who underwent MSLT between January and December 2021.

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References

  1. 1.Uchida S, Maruo T, Takagi S, Sugihara G, Takahashi H. "Subjective sleepiness and objective sleep propensity in adults with attention-deficit/hyperactivity disorder referred for multiple sleep latency testing.." Frontiers in psychiatry, 2026. PMID: 42445547 DOI: 10.3389/fpsyt.2026.1848254
Disclaimer: This content is for educational purposes only and is not medical advice. Evidence scores reflect the quality and quantity of available research, not clinical recommendations. Always consult a healthcare professional before starting any supplement or intervention.