J-curve relation between daytime nap duration and type 2 diabetes or metabolic syndrome: A dose-response meta-analysis

02 Dec 2016Tomohide Yamada, Nobuhiro Shojima, Toshimasa Yamauchi & Takashi Kadowaki

Dose-response meta-analysis showed a J-curve relation between nap time and the risk of diabetes or metabolic syndrome, with no effect of napping up to about 40 minutes/day, followed by a sharp increase in risk at longer nap times. In summary, longer napping is associated with an increased risk of metabolic disease.

Meta Analysis
2 effects
288883 subjects

Reported Outcomes

CausesOutcomeCertainty

Napping Selfcare risk & protective factor
Napping
Selfcare

Type 2 Diabetes Lymphatic outcome
Increased risk of Type 2 Diabetes
Lymphatic system

High evidence
46.0%

Napping Selfcare risk & protective factor
Napping
Selfcare

Metabolic Syndrome Lymphatic outcome
Minor increase risk of Metabolic Syndrome
Lymphatic system

High evidence
19.0%