Study of the incidence of weight gain in night-shift workers and its relationship with the sleeping / Estudo da incidencia de aumento de peso em trabalhadores do turno noturno e sua relação como o sono

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

The main goals of this work were: evaluate the individuals? characteristics of the sleep-wake cycle compare the variation in weight, in the period of two years, among individuals working in the day-shift and in the night-shift; investigate the existence of any relationship between the working time in the night-shift and change in weight and BMI as well as investigate any relationship between change in weight and BMI and the variables of the sleep-wake cycle which in this study are taken as latency, quality of sleep in the night, sleep duration and napping. This research counted on a number of participants of (n=76) people, (n=50 of the night-shift and n=26 of the day-shift), from several distinct professions: nurses, nursing technician and nurses aides that worked in the Hospital das Clínicas da Universidade Estadual de Campinas. The average age of the group was 42 years. The working time of the night-shift was from 19h00min to 07h00min of the following day, and the working time of the day-shift was from 07h00min to 13h00min or from 13h00min to 19h00min. The instrumentation used to collect the date was: the diary of sleep (which was filled in with data for 30 consecutive days); questionnaire on personal information related to life style; a balance to measure weight and height to get data for BMI calculation, and the BRAY (1998) table to classify the BMI. The data related to weight were collected in two distinct points in time; the first instant is represented by weight-1, height-1 and BMI-1 of the records from Occupational Health and Safety Division at UNICAMP, respective to the Labor Health control of the period of 2003. The second instant, in 2005, is represented by weight-2, height-2 and BMI-2. The results of the analysis of the night- shift group and day-shift group sleep patterns lead to data statistically significative (Mann-Whitney test) for the latency of sleep (p=<0,001), wake up time (p=<0,001), night sleep duration (p=0,002), night sleep quality (p=0,009), and occurrence of napping (p=0,001). It was found through the test of correlation of Spearman that there was a statistically significant difference (r=-0,296; p=0,0366), given that the difference in weight and the IMC decrease as it increases the frequency of physical activity. From the comparison among the results of the weight increase associated with time of work in the night-shift, it was noticed that there was not significant difference by means of the test of Mann-Whitney (p=0,302), however, the average time of work of the groups with weight reduction and with weight increase showed differences: (11,18 years and 13,87 years respectively). It was noticed that the individuals from the group of night-shift lead to average IMC higher than the ones from the group of day-shift with statistically significant differences (test of Mann-Whitney). However, it was not identified any reason to support the statement that the altered sleep was present and that influenced the weight increase in the group of night-shift

ASSUNTO(S)

weight gain sleep ganho de peso night work sono trabalho noturno

ACESSO AO ARTIGO

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