Exact(3)
This article describes the rationale, sampling methods and questionnaire content as well as the laboratory methodology.
For ease of use, we adapted the tool by combining its items into key categories (rationale, sampling and recruitment, intervention and outcomes, data collection and analyses).
Yet we note in our small sample that reporting of research conduct (i.e. research question and rationale, sampling strategy and data collection methods) in mixed methods papers has not improved over time.
Similar(57)
Information about the ethnic adscription and the rationale for sampling collection is provided in [3] (see also Table 1).
The rationale for randomly sampling blocks rather than individual columns was to effectively vary the set of representative proteins as in [ 44].
Furthermore, while there is discussion in the literature on appropriate standards for comparing sampling strategies for freshwater bodies of various size and habitat diversity [ 23, 29], there is less discussion on the rationale behind intensive sampling.
The methodological quality of the included studies is summarised in Tables 4 and 5. Most qualitative studies provided a rationale for sample selection, but a clear rationale for sample size was less common.
The youngest birth cohort was dropped from the first observation period while the oldest birth cohort was dropped from the latest observation period (See Myers and Lee, 1998, p. 603 for further details on rationale behind sample selection for the double cohort design).
Eight studies either described dropouts compared with study completers and/or described reasons for dropout [ 18, 20– 28, 28, 30] and only two studies reported a rationale for sample size [ 22, 23].
The seven qualitative studies were high quality with regard to data collection, analysis and reporting; however most lacked a clear theoretical framework; did not address interviewer bias; or provide a rationale for sample size.
Most criteria reflecting the internal validity of studies were met by a majority of studies, with the exception of three internal validity criteria: retention, reporting a rationale for sample size and conducting analyses with consideration for missing data that maintained the fidelity of the randomisation.
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