OBJECTIVE: To investigate the effects of a sleep intervention (Sleep-Opt) compared with an attention control intervention (Healthy Living) on glycemic targets and psychological outcomes in adults with type 1diabetes (T1D). RESEARCH DESIGN AND METHODS: Adults with T1D and short (<6.5 h/night) or irregular (variability of sleep duration ≥1 h) sleep were randomly assigned to either the Sleep-Opt (n = 73) or Healthy Living control (n = 71) intervention, both of which were remotely delivered in eight sessions for 12 weeks. Primary (A1C, continuous glucose monitoring CGM, and objective sleep) and secondary (psychological and subjective sleep) outcomes were collected at baseline and 6, 12, and 24 weeks, with 12 weeks being a primary end point. RESULTS: A1C and CGM parameters at 12 weeks indicated no significant differences between groups. Sleep duration increased at 6 weeks in both groups, but no significant differences were observed between groups at any time point. Sleep-Opt participants had reduced diabetes distress (median difference -0.18 95% CI -0.35, -0.01) and improved subjective sleep quality (-0.96 -0.17, -0.23) compared with the Healthy Living group at 6 weeks but not at other time points. A significant interaction was found suggesting the effect of the intervention depended on baseline A1C level. At 12 weeks, the Sleep-Opt group with baseline A1C ≥7% had a lower A1C level than the Healthy Living group (marginal mean -0.32% 95% CI -0,64%, -0.005%; -3.5 95% CI -7.0, -0.1 mmol/mol; P = 0.047). CONCLUSIONS: Sleep-Opt did not improve glycemic targets or sleep parameters, although sleep improved in both intervention groups. Glycemic benefits were observed in participants with suboptimal A1C, suggesting a possible role of sleep intervention in this patient group.
Martyn-Nemeth et al. (Mon,) studied this question.
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