Dados do Trabalho

Título

Relationship between social jet lag and diabetes markers in overweight night workers

Introdução

Night shift work promotes chronic discrepancy between social and biological clocks defined as social jetlag, which has been associated with an increased risk of developing type 2 diabetes.

Objetivo

To evaluate the association between social jetlag and parameters of diabetes control (HbA1c, glycemia and insulin) among overweight night workers.

Métodos

We performed a double-blind randomized clinical crossover Trial. The present study used only data extracted from the baseline with 43 female overweight night workers of the nursing team at a large hospital in São Paulo/SP. Parameters of diabetes control were assessed from a single 12 hour fasting blood sample. Social jetlag was quantified through the Munich Chronotype Questionnaire (MCTQshift).

Resultados

The mean age of participants was 39.8 years (SD=6.3 years). Most of them were nursing technicians (51.2%) and married (65.1%). The mean time in the current night shift was 5.6 years (SD=3.8 years) and the mean social jetlag was 3:52h (SD=1:25h). There was no difference in proportions of the parameters of diabetes control according to social jetlag. Similarly, there was no association between social jetlag and HbA1 (2nd tertile OR=0.35, 95%CI 0.11-1.10), nor blood glucose (2nd tertile OR=0.47, 95%CI 0.18-1.23, 3rd tertile OR=1.06, 95%CI 0.38-2.94). Insulin modeling could not be performed due to the small number of participants with inadequate levels of this parameter.

Conclusões

Although the participants experienced high levels (>2 hours) of social jetlag, it was not associated with the parameters of diabetes control. It is noteworthy that more studies are needed to understand what effects social jet lag can have on metabolic disorders in night workers.

Palavras-chave

Social jet lag, Diabetes markers, Night work, Melatonin supplementation.