AN AVERAGE DAILY NUMBER OF STEPS NEGATIVELY CORRELATES WITH AN AVERAGE GLYCEMIC VALUE IN TYPE I DIABETIC PATIENTS: COMPARISON BETWEEN CGM AND PEDOMETER RECORDS
Abstract
Background and Aims:Physical activity has great impact onblood glucose levels in patients with diabetes mellitus. The ob-jective of the study was to determine the daily steps taken and toanalyze their effect on glycemic values of Type I diabeticpatients.Method:34 patients with type 1 diabetes have been includedinto the study (20 women and 14 men).
Data from 31 of thesepatients have been evaluated. Each patient was equipped withan electronic pedometer Flex (Fitbit, Inc.) and a continuousglucose monitoring system Guardian REAL-Time (MedtronicInc.).
Multiple regression analysis and GAM (Generalized ad-ditive model) were used for the statistical model-based dataprocessing.Results:The system was used by patients for approx.5.82-0.89 days on average. In total, 120 days of usage wereevaluated.
The average number of steps per patient was10,285-3172/24 hours, the lowest average daily steps among thepatients was 4241 and the largest number was 15,790. We proveda negative correlation between the average number of steps perday and the average daily blood glucose value (GAM).
The re-lationship between the intraday numbers of steps and the bloodglucose levels was not found.Conclusion:The performed simulations show a correlationbetween the average number of steps per day and the averagedaily blood glucose values. This finding is in concordance withgeneral knowledge about relationship between glycemia andphysical activity but also suggests that pedometer could identifydays (those with less physical activity) with increased needs ofinsulin