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| Author(s): |
Iara Cecília Pasqua
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Faculdade de Saúde Pública (FSP/CIR) |
| Defense date: | 2003-05-20 |
| Examining board members: |
Claudia Roberta de Castro Moreno;
Luiz Silveira Menna Barreto;
Marly Augusto Cardoso
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| Advisor: | Claudia Roberta de Castro Moreno |
| Abstract | |
Objectives: The eating habits of workers may vary according to the season of the year and the corresponding work schedule. A study aiming at verifying the variations occurring in their diet in summer and in winter, as well as the nutritional status of those who work in fixed shifts was carried out. The 24-hour distribution of the amount of calories and macronutrients ingested and the circadian rhythmicity of the calories contained in their diet were also analyzed. Methodology: The study was carried out with 28 workers subject to three fixed work shifts (morning, afternoon, and night) at a transport company in São Paulo. The food consumption was checked by using the 3-day dietary record, and their nutritional status was evaluated through the body mass index, both in winter and in summer. Parametric and non-parametric tests were performed so as to compare the different groups of workers and the seasons. The Cosinor method was utilized to verify the circadian rhythmicity of the calories included in their diet. Results: In winter, the workers typical diet contained a larger amount of calories (p=0,00), carbohydrates (p=0,00) and lipids (p=0,03). Their body mass index, on the other hand, did not show any variation from one season to another. The comparison carried out among the groups of workers did not show differences as to the amount of calories (p=0,44), proteins (p=0,78), carbohydrates (p=0,59) and lipids (p=0,24) in none of the seasons, and no differences as to the body mass index were observed, that is, the same index (p=0,35) was registered both in summer and winter. On both seasons a circadian rhythmicity of the calories was found in the workers belonging to the morning shift (p<0,05) and those belonging to the afternoon shift (p<0,05). Conclusion: The eating habits of workers subject to fixed shifts varied from one season to another, but the variation did not reflect upon their body mass index. In view of this, we might conclude that the work schedule (morning, afternoon, or night) do not seem to be related to the seasonal changes observed. Nevertheless, a 24-hour distribution of food intake may reflect upon the shift the worker is subject to. (AU) | |