Full text
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| Author(s): |
Rose Raad
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Faculdade de Arquitetura e Urbanismo (FAU/SBI) |
| Defense date: | 2024-06-05 |
| Examining board members: |
Leonardo Marques Monteiro;
Betina Tschiedel Martau;
Mario Pedrazzoli Neto
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| Advisor: | Leonardo Marques Monteiro; Claudia Roberta de Castro Moreno |
| Abstract | |
Exposure to light during the work period deserves even more attention in night shift workers, because the inadequate timing of stimulation on intrinsically photosensitive retinal ganglion cells (ipRGC) can compromise health. Thus, the objective of this study was to comparatively verify the effect of the workplace lighting system with the effect of the lighting intervention, projected in the same workplace, on the variables related to the rhythm of activity/rest, alertness and sleep in night workers. The intervention on the existing lighting system took place through the addition of table lamps, developed for this research, and was calculated from the data obtained in on-site and laboratory lighting measurements, so that each participant received the desirable melanopic stimulus during the night shift (24h-06h). The volunteers in this research were submitted to a first stage of collections, with the completion of a daily protocol of activities and the uninterrupted use of an actigraph on the wrist of the non-dominant hand. These procedures were repeated in a second stage of collections, with the installation of a lamp on each participant\'s table, a few days after the end of the first stage. Mean comparison tests (parametric and non-parametric) were used to compare the measurements of interest before and with the implementation of the projected lighting. Data analysis showed an increase in the latency of the main sleep episode on days off (p=0.02). With the intervention, the mean reaction time at the beginning of the shift was higher (p<0.001), however, the reaction time at the end of the shift not only decreased in relation to the initial measurement with the intervention (p=0.001), but was also lower than the result found at the end of the work period before the installation of the lamp on the table (p=0.004). Similar to the results obtained for the mean reaction time, the comparison before versus with the intervention showed that with the new lighting, the average value recorded for the perception of sleepiness (KSS) increased at the beginning of the shift (p=0.03) and decreased at the end of the night (p=0.04). Thus, the intervention performed proved to benefit the alertness of workers at the end of the night shift, although without benefits on sleep measurements. (AU) | |
| FAPESP's process: | 21/05001-1 - Circadian stimulus as a tool for the lighting project aimed at the health of night shift workers |
| Grantee: | Rose Raad |
| Support Opportunities: | Scholarships in Brazil - Master |