The participants at the start of the study who had weekday sleep debt were found to be 72% more likely to be obese, compared with participants who had no weekday sleep debt. By follow-up at 6 months, the association between weekday sleep debt and obesity and insulin resistance was found to be significant.
At 12-month follow-up, the researchers calculated that for every 30 minutes of weekday sleep debt there was an associated 17% increased risk of obesity and 39% increased risk of insulin resistance.