Bothprimary and secondary sourcesare important for research, but primary sources tend to be more reliable because of their direct connection. At the same time, primary sources are usually harder to find (because there are fewer of them), so secondary sources help fill in the gaps and sometimes...
It will also be checked if the popula- tion data is appropriate by comparing it with data from the census and other official sources. In the case of items related to clinical activities (for example blood pressure measurement), any register with missing values will be considered as not ...
The strength of these reports -- a key primary source -- lies in the fact that they were compiled from a great diversity of independent sources, notably the 13 different regional headquarters of the ministry, as well as panels of civilians and officials. The subjects covered include reactions ...
thisdatahas already been collected by some other source and an investigator makes use of it for his purpose.Secondarydatais different fromprimarydataon the basis of the sources of their collection. The difference between the two is relative -datawhich isprimaryat one place becomesecondaryat ...
Workflow and data sources for the map of potential primary forests in Sweden. Data on woodland key habitats derive from60 (see also: https://www.skogsstyrelsen.se); forest with conservation value from61,62, forest core areas from63, continuity forests from64,65, protected mountain coniferous ...
Therefore, the aim of this systematic review was to determine the evidence-base on prognostic factors for poor outcomes in people living with dementia that could be assessed in primary care medical records. Methods To identify the evidence base for prognostic factors of poor outcomes in people ...
None of the allocation concealment schemes were described; none accounted for whether patients and investigators were blinded; and none accounted for whether outcomes were assessed. None described data completeness. All reported on prespecified indicators. None of the trials described sources of bias. ...
Existing data sources for clinical epidemiology: the PHARMO Database Network. Clin Epidemiol. 2020;12:415-422. doi:10.2147/CLEP.S247575 PubMedGoogle ScholarCrossref 4. Shilo S, Rossman H, Segal E. Axes of a revolution: challenges and promises of big data...
research, or else by erroneous interpretation of 19th Century scientific findings, to exaggerate the iron content of spinach tenfold. Further, the failure to study original sources is evidenced in a multitude of completely erroneous publications claiming that these apocryphal errors caused Segar to ...
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