Influence of the chronotype on the body composition and metabolic variables of nurses

Abstract

Introduction: The chronotype (CT) is a characteristic of the individual that modulates the person's ability to be more active and alert in a given period of the day. People of evening CT (CTV) have been associated with less sleep, increased exposure to artificial night light and changes in body composition (CC) and metabolic. Objective: To evaluate the possible association between CT and body composition and metabolic variables in a group of nurses. Material and methods: Cross-sectional study in 50 nurses from different hospitals in Mexico. Age: 35.36 ± 8.88 years. CT by the Horne-Östberg questionnaire (2005). Anthropometry: weight, height and body mass index (BMI). Body fat (GC) and skeletal muscle mass (MME) were determined by bioelectric impedance. In addition, serum concentrations of fasting glucose, insulin and HOMA-IR index were obtained. Statistics. Student's T and simple ANOVA. Signi ficance: p <0.05. Results: 68% of the nurses of CTV, come from Mexico City and Puebla, work in the Intensive Care Unit and have the highest values of GC, lower MME compared to the other CT (p <0.005); Likewise, hyperinsulinemia (15.4 ± 4.0 IU) and HOMA-go> 3.0. ± 0.8 (p = 0.000) predominated. Conclusions: O CTV foi associado a enfermeiros da área da Unidade de Terapia Intensiva e Emergência, além de maiores valores de massa gorda e resistência à insulina.