Caffeine for the prevention of injuries and errors in shift workers
Ker K, Edwards PJ, Felix LM, Blackhall K, Roberts I
The Cochrane database of systematic reviews · 43 citas
Etiquetas de revisión
Financiación no declaradaDatos neutrales que nuestra revisión registró sobre cómo se hizo este estudio. Describen el método, nunca si nos gusta el resultado.
Cómo se estudió
- Diseño
- Metaanálisis (indexado por PubMed)
- Estudiado en
- Personas
- Resultado principal
- Marcadores de salud y funcionamiento
Quién lo pagó
- Financiación
- Financiación no declarada
Publicación
- Publicado
- 2010-05-11 · Cochrane Database Syst Rev · vol. 2010 · número 5 · pág. CD008508
- Editorial
- Elsevier BV
- Citado
- 132 citas · más que el 98% de estudios similares · 10.4× el promedio de su campo
- Impacto
- Entre el 10 % más citado de su campo
- Referencias
- 75 trabajos
- Acceso
- Lectura gratuita
- Áreas de investigación
- Sleep and Work-Related Fatigue · Coffee research and impacts · Circadian rhythm and melatonin
- Palabras clave
- caffeine, shift work disorder, jet lag, circadian rhythm sleep disorders, sleepiness, alertness, injury prevention, human error, cognitive performance, shift workers, occupational safety, memory, attention
- MeSH
- humans, sleep disorders, circadian rhythm, caffeine, central nervous system stimulants, psychomotor performance, cognition disorders, neuropsychological tests, accidents, occupational, work schedule tolerance, randomized controlled trials as topic
5 autores
- Katharine Ker🇬🇧London School of Hygiene & Tropical Medicine
- Phil J Edwards🇬🇧London School of Hygiene & Tropical Medicine
- Lambert M. Felix🇬🇧London School of Hygiene & Tropical Medicine
- Karen Blackhall🇬🇧London School of Hygiene & Tropical Medicine
- Ian Roberts🇬🇧London School of Hygiene & Tropical Medicine
Resumen
El texto original del estudio, en el idioma en que se publicó.
Background
Sleepiness leads to a deterioration in performance and attention, and is associated with an increased risk of injury. Jet lag and shift work disorder are circadian rhythm sleep disorders which result in sleepiness and can elevate injury risk. They create a need for individuals to operate at times which are different to those dictated by their circadian rhythms. Consequently there is also a need for interventions to help ensure that these persons can do so safely. Caffeine has a potential role in promoting alertness during times of desired wakefulness in persons with jet lag or shift work disorder, however its effects on injury and error are unclear.
Objectives
To assess the effects of caffeine for preventing injuries caused by impaired alertness in persons with jet lag or shift work disorder.
Search strategy
We searched the Cochrane Injuries Group Specialised Register, CENTRAL (The Cochrane Library), MEDLINE, EMBASE, PsycINFO, CINAHL, TRANSPORT (to July 2008); and PubMed databases (to April 2010). We also searched the Internet and checked reference lists of relevant papers.
Selection criteria
Randomised controlled trials investigating the effects of caffeine on injury, error or cognitive performance in people with jet lag or shift work disorder.
Data collection and analysis
Two authors independently screened search results and assessed full texts for inclusion. Data were extracted and risk of bias was assessed. Estimates of treatment effect (odds ratio and standardised mean difference (SMD)) and 95% confidence intervals (CI) were calculated and pooled using the fixed-effect model.
Main results
Thirteen trials were included. None measured an injury outcome. Two trials measured error, and the remaining trials used neuropsychological tests to assess cognitive performance. The trials assessing the impact on errors found that caffeine significantly reduced the number of errors compared to placebo. The pooled effect estimates on performance by cognitive domain suggest that, when compared to placebo, caffeine improved concept formation and reasoning (SMD -0.41; 95% CI -1.04 to 0.23), memory (SMD -1.08; 95% CI -2.07 to -0.09), orientation and attention (SMD -0.55; 95% CI -0.83 to -0.27) and perception (SMD -0.77; 95% CI -1.73 to 0.20); although there was no beneficial effect on verbal functioning and language skills (SMD 0.18; 95% CI -0.50 to 0.87). One trial comparing the effects of caffeine with a nap found that there were significantly less errors made in the caffeine group. Other trials comparing caffeine with other active interventions (for example nap, bright light, modafinil) found no significant differences. There is a high risk of bias for the adequacy of allocation concealment and presence of selective outcome reporting amongst the trials.
Authors' conclusions
Caffeine may be an effective intervention for improving performance in shift workers however, there are no trials from which we can assess its effect on injuries. The results largely originate from studies involving young participants under simulated conditions, and the extent to which the findings are generalisable to older workers and real world shift work is unclear. Based on the current evidence, there is no reason for healthy individuals who already use caffeine within recommended levels to improve their alertness to stop doing so. The assessment of the relative effects of caffeine to other potential countermeasures should be a focus of future research.
Resumen vía Europe PMC. Los derechos de autor siguen siendo de los autores o la editorial.
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