The role of accelerometer-derived sleep traits on glycated haemoglobin and glucose levels: a Mendelian randomization study

Sci Rep. 2024 Jun 28;14(1):14962. doi: 10.1038/s41598-024-58007-9.

Abstract

Self-reported shorter/longer sleep duration, insomnia, and evening preference are associated with hyperglycaemia in observational analyses, with similar observations in small studies using accelerometer-derived sleep traits. Mendelian randomization (MR) studies support an effect of self-reported insomnia, but not others, on glycated haemoglobin (HbA1c). To explore potential effects, we used MR methods to assess effects of accelerometer-derived sleep traits (duration, mid-point least active 5-h, mid-point most active 10-h, sleep fragmentation, and efficiency) on HbA1c/glucose in European adults from the UK Biobank (UKB) (n = 73,797) and the MAGIC consortium (n = 146,806). Cross-trait linkage disequilibrium score regression was applied to determine genetic correlations across accelerometer-derived, self-reported sleep traits, and HbA1c/glucose. We found no causal effect of any accelerometer-derived sleep trait on HbA1c or glucose. Similar MR results for self-reported sleep traits in the UKB sub-sample with accelerometer-derived measures suggested our results were not explained by selection bias. Phenotypic and genetic correlation analyses suggested complex relationships between self-reported and accelerometer-derived traits indicating that they may reflect different types of exposure. These findings suggested accelerometer-derived sleep traits do not affect HbA1c. Accelerometer-derived measures of sleep duration and quality might not simply be 'objective' measures of self-reported sleep duration and insomnia, but rather captured different sleep characteristics.

Keywords: Diabetes; Epidemiology; Glucose; Glycated haemoglobin; Mendelian randomization; Sleepiness.

MeSH terms

  • Accelerometry*
  • Adult
  • Aged
  • Blood Glucose* / analysis
  • Female
  • Glycated Hemoglobin* / analysis
  • Glycated Hemoglobin* / metabolism
  • Humans
  • Male
  • Mendelian Randomization Analysis*
  • Middle Aged
  • Self Report
  • Sleep Initiation and Maintenance Disorders / genetics
  • Sleep* / genetics
  • Sleep* / physiology

Substances

  • Glycated Hemoglobin
  • Blood Glucose
  • hemoglobin A1c protein, human