Abstract
AimTo evaluate the effect of the historic Spanish heatwave (9th–26th July 2022) over glycemic control in adults with type 1 diabetes (T1D). MethodsCross-sectional retrospective analysis of adult patients with T1D in Castilla-La Mancha (south-central Spanish region) using intermittently scanned continuous glucose monitoring (isCGM) during and after the heatwave. Primary outcome was change in time in range (TIR) 3.0–10 mmol/L (70–180 mg/dL) of interstitial glucose in the two weeks following the heatwave. ResultsA total of 2701 T1D patients were analyzed. We detected a TIR reduction of 4.0 % (95 % CI −3.4, −4.6; P < 0.001) in the two weeks following the heatwave. Patients in the highest daily scan frequency quartile (>13 scans/day) during the heatwave showed the greatest deterioration in TIR after it concluded (−5.4 % [95 % CI −6.5, −4.3; P < 0.001]). The percentage of patients meeting all the recommendations of the International Consensus of Time in Range was greater during the heatwave than after it ended (10.6 % vs. 8.4 %, P < 0.001). ConclusionsAdults with T1D had better glycemic control during the historic Spanish heatwave compared to the following period.
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