Exact(2)
Very few studies fulfilled these criteria.
Very few studies fulfilled criteria 10 and 11: 10, 'Were the index test results interpreted without knowledge of the results of the reference standard?' (6/31, 19%) [19,22,30,31,41,44] and 11, 'Were the reference standard results interpreted without knowledge of the results of the index test?' (7/31, 23%) [19,22,30,31,39,41,44].
Similar(58)
However there were very few studies fulfilling these criteria.
The fact that we found few studies fulfilling our eligibility criteria, even as accepting less rigorous designs for evaluating effectiveness of interventions, confirms that little research effort is placed on this matter.
Few studies fulfill the criteria of good study design because of small sample size, insensitive measures of effect, selection, recall, and observation bias, weak if any control of confounding factors, bad definition of exposure, inability to analyze a dose-response relationship, and inadequate statistical analysis.
Thus, so far, few studies have fulfilled all of these criteria.
Four studies fulfilled the inclusion criteria.
Sixty-eight studies fulfilled the inclusion criteria.
Forty-five studies fulfilled the inclusion criteria.
Thirty-seven studies fulfilled the inclusion criteria.
No published studies fulfilled the inclusion criteria.
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