Long Daytime Napping Is Associated with Increased Adiposity and Type 2 Diabetes in an Elderly Population with Metabolic Syndrome.

Christopher Papandreou,Rosa Casas,Josep Vidal,Olga Castañer,Helmut Schröder,Emilio Ros,Montse Fitó,Dora Romaguera,Laura Gallardo-Alfaro,Andrés González-Botella,Dolores Corella,Xavier Pintó,José Lapetra,Clotilde Vázquez,Jesús Vioque,Jadwiga Konieczna,Alberto Goday,Itziar Abete,Lidia Daimiel,Josep A Tur,Inmaculada Bautista-Castaño,Vicente Martín-Sánchez,Ramón Estruch ,Jessica Vaquero‐Luna ,Aurora Bueno‐Cavanillas ,Nancy Babió ,Araceli Muñoz‐Garach ,Aina María Galmés-Panadés ,Miguel Ruiz‐Canela ,Miguel Ángel Martínez‐González ,Andrés Díaz‐López ,Pilar Matía‐Martín ,José Carlos Fernández-García ,Francisco Javier Barón-López ,Napoleón Pérez‐Farinós ,Ángel M Alonso‐Gómez ,Pilar Buil‐Cosiales ,Antonio García‐Rios ,Julia Wärnberǵ ,F Trias ,Nerea Becerra‐Tomás ,Rocío Barragán ,Miguel Delgado-Rodrı́guez ,José Manuel Santos‐Lozano ,Lluís Serra‐Majem ,Anai Moreno-Rodríguez ,Mònica Bulló ,Alfredo Martı́nez ,Vicente Martín ,Manuela García‐De‐La‐Hera ,Jordi Salas‐Salvadó

doi:10.3390/jcm8071053

Abstract

Research examining associations between objectively-measured napping time and type 2 diabetes (T2D) is lacking. This study aimed to evaluate daytime napping in relation to T2D and adiposity measures in elderly individuals from the Mediterranean region. A cross-sectional analysis of baseline data from 2190 elderly participants with overweight/obesity and metabolic syndrome, in the PREDIMED-Plus trial, was carried out. Accelerometer-derived napping was measured. Prevalence ratios (PR) and 95% confidence intervals (CI) for T2D were obtained using multivariable-adjusted Cox regression with constant time. Linear regression models were fitted to examine associations of napping with body mass index (BMI) and waist circumference (WC). Participants napping ≥90 min had a higher prevalence of T2D (PR 1.37 (1.06, 1.78)) compared with those napping 5 to <30 min per day. Significant positive associations with BMI and WC were found in those participants napping ≥30 min as compared to those napping 5 to <30 min per day. The findings of this study suggest that longer daytime napping is associated with higher T2D prevalence and greater adiposity measures in an elderly Spanish population at high cardiovascular risk.

Highlights

Daytime napping (“siesta”), defined as a short sleep typically taken in the early afternoon, is a common practice in many parts of the world, including the Mediterranean region
We examined the associations of 10 ln transformed minutes increment in daytime napping with type 2 diabetes (T2D)
We examined the associations of 10 ln transformed minutes increment in daytime napping with body mass index (BMI) and waist circumference (WC)

Summary

Introduction

Daytime napping (“siesta”), defined as a short sleep typically taken in the early afternoon, is a common practice in many parts of the world, including the Mediterranean region. Older adults take a nap more often than younger ones [1,2,3] and its duration can range from a few minutes to several hours. A short nap (

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