Implementation of 12-hour shifts in a brazilian petrochemical plant: impact on sleep and alertness (2000)
- Authors:
- Autor USP: FISCHER, FRIDA MARINA - FSP
- Unidade: FSP
- Subjects: SAÚDE AMBIENTAL; TRABALHO EM TURNOS
- Language: Inglês
- Abstract: A recent worldwide trend in chemical and petrochemical industries is to extend the duration of shifts. Optimization of the labor force to reduce costs is one reason to increase the length of working time in a shift. Implementation of 12h shiftsis a controversial decision for managers and scientists. Literature reviews show alertness is lower during the nighttime hours, and sleep duration is reduced and worse during the daytime. The main objective of this study was to evaluate theimpacts of 12h shifts on alertness and sleep. To evaluate the duration and quality of sleep and alertness during work, 22 male shift workers on a continuous rotating schedule at a petrochemical plant completed activity logs and estimatedalertness using analog 10-cm scales for 30 consecutive days, three times (at 2h, 6h, and 10h of the shift) every work shift. Statistical tests (analysis of variance [ANOVA] and Tukey) were performed to detect differences between workdays and offdays. The shift schedule was 2 days/3 nights/4 off days, followed by 3 days/2 nights/5 off days, followed by 2 days/2 nights/5 off days. Sleep duration varied significantly (p<.001) among the work shifts and off days. Comparing work nights, theshortest mean sleep occurred after the second night (mean=311.4 minutes, SD=101.7 minutes), followed by the third night (mean=335.3 minutes, SD=151.2 minutes). All but one shift (sleep after the first work night) were significantly differentfrom sleep after the first 2 workdays(p<.002). Tukey tests showed no significant differences in sleep quality between workdays and nights, with the exception of sleep after the third day compared to sleep after night shifts. However,significant differences were detected between off days and work nights (p<.01). ANOVA analysis showed borderline differences among perceived alertness during day shifts (p=.073) and significant differences among the hours of the shifts (p=.0005)
- Imprenta:
- Publisher place: California
- Date published: 2000
- Source:
- Título do periódico: Chronobiology international
- Volume/Número/Paginação/Ano: v. 17, n. 4, p. 521-537, 2000
-
ABNT
FISCHER, Frida Marina et al. Implementation of 12-hour shifts in a brazilian petrochemical plant: impact on sleep and alertness. Chronobiology international, v. 17, n. 4, p. 521-537, 2000Tradução . . Acesso em: 23 abr. 2024. -
APA
Fischer, F. M., Moreno, C. R. de C., Borges, F. N. da S., & Louzada, F. M. (2000). Implementation of 12-hour shifts in a brazilian petrochemical plant: impact on sleep and alertness. Chronobiology international, 17( 4), 521-537. -
NLM
Fischer FM, Moreno CR de C, Borges FN da S, Louzada FM. Implementation of 12-hour shifts in a brazilian petrochemical plant: impact on sleep and alertness. Chronobiology international. 2000 ; 17( 4): 521-537.[citado 2024 abr. 23 ] -
Vancouver
Fischer FM, Moreno CR de C, Borges FN da S, Louzada FM. Implementation of 12-hour shifts in a brazilian petrochemical plant: impact on sleep and alertness. Chronobiology international. 2000 ; 17( 4): 521-537.[citado 2024 abr. 23 ] - Fatores individuais e condições de trabalho e de vida na tolerância ao trabalho em turnos
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