A new study published in Diabetic Medicine has found that it is not the actual number of overnight low blood sugar episodes, but the unpredictability of glucose levels, that drives parental anxiety and poor sleep in families managing type 1 diabetes (T1D).

Researchers surveyed 136 parents of children with T1D, alongside continuous glucose monitoring (CGM) data from 116 children, to explore how fear of nighttime hypoglycemia (FoNH) influences parental sleep quality. The findings suggest that while actual hypoglycemia events did not directly correlate with sleep disturbance or anxiety, increased variability in overnight glucose readings was strongly linked to both higher parental fear and poorer sleep.

Parents who reported higher levels of FoNH also reported lower sleep quality overall, with fear alone accounting for 26% of the impact that glucose variability had on their rest. 

The study found mixed results regarding the impact of diabetes technologies, such as CGMs or insulin pumps, on parental anxiety and sleep. While such tools can help monitor glucose, they may not always reduce fear, especially if they lead to frequent alerts or uncertainties about overnight control.