Indicators for reliability and validity		Level of reliability and validity	Level of validity
Clear specification of data collection and data analysis	Detailed description on which type of research was used	High	High
	Definition of research variable	High	High
	Sources used stated	High	High
	Information on how it dealt with missing data	High	High
	Date of collection available	High	High
	Information on how quality of data used in controlled	High	High
	Transforming data (from raw data to result	High	High
	Information about method used, e.g, statistical tests	High	High
	Coding of data whether and how?	High	High
	Clear organisation of data	High	High
	Contact data presented	High	High
Clear specification about potential changes in procedure	Information about changes in methods used from one study to another	High	High
	Information about changes in sources used from one study to another	High	High
	Information about changes in definitions used from one study to another	High	High
Updates	Due to error correction—information given	High	High
Updates	Due to new version of report	High	High
Result of comparing data collected out the research concepts with the actual research concepts data	Dataset similar to each other	High	High
Missing research variables report	Data for missing variables could be found using other sources that the research	Low	Low
	Data for missing variables could partly be found using other sources that the research	Medium	Medium
	Data for missing variables could not be found using other sources that the research	High	High