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
