A method of diabetes analysis includes obtaining average glucose level information for a time period over a plurality of days. A current event occurrence is determined. An event occurrence in the average glucose level information within the time period corresponding to the current event occurrence is determined, where the current event occurrence is at a different time of day than the event occurrence. The average glucose level information starting in time from the event occurrence within the time period is analyzed. A notification event in the average glucose level information starting in time from the event occurrence within the time period is determined. A current notification event in time from the current event occurrence is predicted based on a time span from the event occurrence to the notification event in the average glucose level information. An action is initiated in advance of the predicted current notification event.