In order to provide support for our decision on how conclusive the reported results of a study are, we added the following categories: study sample, study duration, method of data collection, and outcome.
The variability of data is probably attributable to differing study populations (degree of selection, Type 1 diabetes and/or insulin-treated Type 2 diabetes), targets for glycaemic control, duration of treatment, methods of data collection and country coverage within these studies.
Indeed, it would be worth evaluating recall periods over five years because longer recall durations can increase the efficiency of data collection and statistical power of the results.
Throughout the duration of the study, the completeness of data collection and compliance with patient enrolment will be quality assured.
Nevertheless, these resources could be considered small taking into account the scale of the network structure, the complexity involved in controlling the quality of data collection and the duration of surveillance.
The exact relationship between cursor duration and proportion of errors varies quite a bit across participants because of the self-paced nature of data collection and the individualized progression to shorter cursor durations.
Information collected included: duration of data collection period, number of records reviewed, ease of collection, time taken, and number of people educated, educational tools used and problems encountered during the education.
As the duration of data collection for the earlier study and the present study varied, we compared the average number of self-harm attendances per 4-week period in 2001/2002 and 2010/2011.
All studies were conducted in the period that the infants needed supplemental oxygen, but the starting time points and duration of data collection differed between studies.
(iii) Follow-up: To enable calculation of total person-years of observation, we included studies that specified either total population and duration of data collection, or anaphylaxis incidence rate.
