Trial reportSleep2007
Aging and nocturnal driving: better with coffee or a nap? A randomized study.
Trial report in Sleep, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers, 1 of them a synthesis that pooled 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.
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.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
21 citing papers in PubMed, 1 synthesis or guideline pooled it, 98 citations in OpenAlex.
- Effects of napping on sleepiness and sleep-related performance deficits in night-shift workers: a systematic review.Biological research for nursing · 2014Pooled it
- Effects of upper-airway stimulation on sleep architecture in patients with obstructive sleep apnea.Sleep & breathing = Schlaf & Atmung · 2017Trial
- Trial
- Effects of coffee on driving performance during prolonged simulated highway driving.Psychopharmacology · 2012Trial
- In-car nocturnal blue light exposure improves motorway driving: a randomized controlled trial.PloS one · 2012Trial
- Positive effects of Red Bull® Energy Drink on driving performance during prolonged driving.Psychopharmacology · 2011Trial
- Comparing the benefits of caffeine, naps and placebo on verbal, motor and perceptual memory.Behavioural brain research · 2008Trial
- Poorer objective but not subjective driving performance in drivers vulnerable to sleep loss effects during extended wake.Journal of sleep research · 2025Article
- A Survey Exploring How Watch Officers Manage Effects of Sleep Restrictions during Maritime Navigation.International journal of environmental research and public health · 2023Article
- Interest of the BLAST paradigm and salivary markers for the evaluation of sleepiness in drivers.Frontiers in neuroscience · 2022Article
- The Effect of Experimental Recuperative and Appetitive Post-lunch Nap Opportunities, With or Without Caffeine, on Mood and Reaction Time in Highly Trained Athletes.Frontiers in psychology · 2021Article
- The impact of sleep deprivation and alcohol on driving: a comparative study.BMC public health · 2020Article
- The Case for Addressing Operator Fatigue.Review of human factors and ergonomics · 2015Article
- Prevalence of sleep-related accidents among drivers in Saudi Arabia.Annals of thoracic medicine · 2014Article
- Insufficient sleep in adolescents and young adults: an update on causes and consequences.Pediatrics · 2014Review
- Sleep and the price of plasticity: from synaptic and cellular homeostasis to memory consolidation and integration.Neuron · 2014Review
- Sleep disorders as a cause of motor vehicle collisions.International journal of preventive medicine · 2013Article
- Do circadian preferences influence the sleep patterns of night shift drivers?Medical principles and practice : international journal of the Kuwait University, Health Science Centre · 2013Article
- Influence of age, circadian and homeostatic processes on inhibitory motor control: a Go/Nogo task study.PloS one · 2012Article
- Reduced neurobehavioral impairment from sleep deprivation in older adults: contribution of adenosinergic mechanisms.Frontiers in neurology · 2012Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
STUDY
objectiveTo test the effects of coffee and napping on nocturnal driving in young and middle-aged participants.
designA cup of coffee (200 mg of caffeine), a placebo (decaffeinated coffee, 15 mg of caffeine), or a 30-minute nap were tested. Participants drove 125 highway miles between 18:00 and 19:30 and between 02:00 and 03:30 after coffee, placebo, or a nap.
settingSleep laboratory and open French highway.
participantsTwelve young (range, 20-25 years) and 12 middle-aged participants (range, 40-50 years). MEASUREMENTS: Inappropriate line crossings, self-perceived fatigue and sleepiness, and polysomnographic recordings were analyzed.
resultsCompared to daytime, after placebo the number of inappropriate line crossings was significantly increased (2 versus 73 for young participants, P < 0.01 and 0 versus 76 for the middle-aged participants, P < 0.05). Both coffee and napping reduced the risk of inappropriate line crossings, compared with placebo, in young participants (respectively, by three-quarters, incidence rate ratios [IRR] = 0.26 95% confidence interval [CI], 0.09-0.74, P < 0.05 and by two thirds, IRR = 0.34 95% CI, 0.20-0.58, P < 0.001) and in middle-aged participants (respectively by nine tenths, IRR = 0.11 95% CI, 0.05-0.21, P < 0.001 and by one fifth, IRR = 0.77 95% CI, 0.63-0.95, P < 0.05). A significant interaction between age and condition (IRR = 2.27 95% CI, 1.28-4.16 P < 0.01) showed that napping led to fewer inappropriate line crossings in younger participants than in middle-aged participants. During napping, young participants slept more (P < 0.01) and had more delta sleep (P < 0.05) than middle-aged participants. Self-perceived sleepiness and fatigue did not differ in both age groups, but coffee improved sleepiness (P < 0.05), whereas napping did not.
conclusionsCoffee significantly improves performance in young and middle-aged participants. Napping is more efficient in younger than in older participants. Countermeasures to sleepiness should be adapted according to the age of drivers.
Indexed as
Identifiers
What OpenQuestion holds
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.