Evidence map›Paper›PMID 27397562›Full record

ArticleSleep2016

A Unified Model of Performance for Predicting the Effects of Sleep and Caffeine.

Sridhar Ramakrishnan, Nancy J Wesensten, Gary H Kamimori, James E Moon, Thomas J Balkin, Jaques Reifman

Registry-linked trialOpen access · bronzeAbstract read
In one paragraph

Article in Sleep, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT05588934 (A Head-to-Head Comparison of the 2B-Alert Caffeine Optimization Algorithm Versus Standard Caffeine Dosing on Performance During Sleep Deprivation), which is not on this map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed
3.5field-weighted citation impact, top 8% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

NCT05588934 narecruitingnot on this mapstarted 2023, after this paper: background citation

A Head-to-Head Comparison of the 2B-Alert Caffeine Optimization Algorithm Versus Standard Caffeine Dosing on Performance During Sleep Deprivation (2B-2)

TypeinterventionalSponsorUniversity of ArizonaRan2023 to 2026Enrolled180ConditionsSleep Deprivation, CaffeineArmsCaffeine Gum, Placebo Gum
3 · Its place in the literature

Who cites it

14 citing papers in PubMed, 38 citations in OpenAlex.

  1. Trial
  2. Article
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  9. Article
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  11. Review
  12. Effects of caffeine on sleep quality and daytime functioning.Risk management and healthcare policy · 2018
    Review
  13. Sleep · 2016
    Article
  14. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 4 institutions in 1 country.

Sridhar RamakrishnanDepartment of Defense Biotechnology High Performance Computing Software Applications Institute, Telemedicine and Advanced Technology Research Center, US Army Medical Research and Materiel Command, Fort Detrick, MD.
Nancy J WesenstenAir Traffic Organization, Federal Aviation Administration, Washington, DC.
Gary H KamimoriBehavioral Biology Branch, Walter Reed Army Institute of Research, Silver Spring, MD.
James E MoonBehavioral Biology Branch, Walter Reed Army Institute of Research, Silver Spring, MD.
Thomas J BalkinBehavioral Biology Branch, Walter Reed Army Institute of Research, Silver Spring, MD.
Jaques ReifmanDepartment of Defense Biotechnology High Performance Computing Software Applications Institute, Telemedicine and Advanced Technology Research Center, US Army Medical Research and Materiel Command, Fort Detrick, MD.
Walter Reed Army Institute of Research · USFederal Aviation Administration · USTelemedicine & Advanced Technology Research Center · USUnited States Army Medical Research and Development Command · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

STUDY

objectivesExisting mathematical models of neurobehavioral performance cannot predict the beneficial effects of caffeine across the spectrum of sleep loss conditions, limiting their practical utility. Here, we closed this research gap by integrating a model of caffeine effects with the recently validated unified model of performance (UMP) into a single, unified modeling framework. We then assessed the accuracy of this new UMP in predicting performance across multiple studies.

methodsWe hypothesized that the pharmacodynamics of caffeine vary similarly during both wakefulness and sleep, and that caffeine has a multiplicative effect on performance. Accordingly, to represent the effects of caffeine in the UMP, we multiplied a dose-dependent caffeine factor (which accounts for the pharmacokinetics and pharmacodynamics of caffeine) to the performance estimated in the absence of caffeine. We assessed the UMP predictions in 14 distinct laboratory- and field-study conditions, including 7 different sleep-loss schedules (from 5 h of sleep per night to continuous sleep loss for 85 h) and 6 different caffeine doses (from placebo to repeated 200 mg doses to a single dose of 600 mg).

resultsThe UMP accurately predicted group-average psychomotor vigilance task performance data across the different sleep loss and caffeine conditions (6% < error < 27%), yielding greater accuracy for mild and moderate sleep loss conditions than for more severe cases. Overall, accounting for the effects of caffeine resulted in improved predictions (after caffeine consumption) by up to 70%.

conclusionsThe UMP provides the first comprehensive tool for accurate selection of combinations of sleep schedules and caffeine countermeasure strategies to optimize neurobehavioral performance.

Indexed as

Models, TheoreticalAdolescentAdultCaffeineCross-Over StudiesDose-Response Relationship, DrugFemaleHumansMaleMiddle AgedPredictive Value of TestsPsychomotor PerformanceSleepSleep DeprivationSleep Initiation and Maintenance DisordersWakefulnessCaffeinebiomathematical modelcaffeine modelchronic sleep restrictionPVTtotal sleep deprivation

Identifiers

PMID27397562
PMCPMC5020365
OpenAlexW2496659502

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.