Dados do Trabalho

Título

Eating habits, sleep, and a proxy for circadian disruption are correlated with dyslipidemia in overweight night workers

Introdução

Circadian rupture, short and poor-quality sleep, as well as irregular sleeping and eating times, are frequent among night workers. Such factors may increase the risk of metabolic changes in these workers.

Objetivo

The aim of this study was to evaluate the relationship between proxy for circadian disruption, eating habits, sleep characteristics, and dyslipidemic parameters.

Métodos

This was a randomized, double-blind, crossover controlled clinical trial, and for this study, only baseline data were used. The sample was composed of 36 overweight female nurses who worked on a fixed night shift (12x36 h). Linear regression models were used to assess the relationship between the mentioned variables.

Resultados

The participants’ average age was 39.4 years (SE 1 year) and the average nighttime sleep duration was 5.76 h (SE 0.16 h). The average chronotype indicated a moderate early type (03:03 h; SE 20 min) and the average social jetlag was 03:42 h (SE 10 min). It was found that 1 h less of nighttime sleep increased very-low-density lipoprotein cholesterol levels by 2.75 mg/dL and triacylglyceride levels by 3.62 mg/dL. Additionally, higher social jetlag was associated with higher low-density lipoprotein cholesterol levels. On the other hand, each additional hour in the chronotype increased high-density lipoprotein cholesterol levels by 3.06 mg/dL and a time interval >2 h between the last meal and sleep onset was associated with higher high-density lipoprotein cholesterol levels.

Conclusões

Short duration of nighttime sleep and high social jetlag are risk factors for dyslipidemia, whereas the late type and the longer time interval between the last meal and sleep onset appear to be protective factors for dyslipidemia.

Palavras-chave

Night work; Dyslipidemia; Sleep; Nursing; Eating behavior.