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The basic study design is a cross-sectional survey conducted by self-completed questionnaire administered in schools selected by a partly purposive and partly convenience-based multinational modified cluster sampling technique.
The basic study design is presented in figure 1.
Whether a cohort study is conducted prospectively or retrospectively, the basic study design is identical – exposed and unexposed groups are compared with respect to disease outcome [ 93].
In studies of diagnostic accuracy the basic study design is cross-sectional, in which all participants receive both the index test and the reference standard.
To allow estimation of both replacement and incremental accuracy, the basic study design is to screen women independently by both mammography and the new test, and assess how many cancers and false positives are detected by one test and not the other.
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The basic assumption of this aspect of our study design is that the distribution of all causes of death in the base population is approximately random, as is the distribution of living spouses, who can therefore be regarded as a representative sample of the base population.
The study design is that of a prospective, basic science study.
Study design is illustrated in Figure 1.
Only if these basic conditions of study design are fulfilled can the effectiveness of the therapy be assessed.
The basic principles of toxicology study design are common to all regulatory systems.
A multi-stage study design was adopted.
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CEO of Professional Science Editing for Scientists @ prosciediting.com