It is important to note that, even in the midst of deciding among the various methods for representing selection processes, these choices have consequences for the empirical adequacy of the selection models.
(ii) The high mean number of sounds combined with a relatively low standard deviation for the motors shows a consensus among the participants that proves the adequacy of the selection of sounds for this category.
Adequacy of sample selection description based on three criteria: (1) age and gender; (2) ethnicity; (3) systemic health conditions, clearly excluding any growth or nutritional problem; (4) any further condition, i.e. use of drugs, that might alter dental and skeletal maturation; and (5) no history of orthodontic treatment (full description: 2 points; partial description: 1 point).
This created difficulty in assessing the adequacy of randomization, selection bias, and confounding.
This pilot will be used to identify problems with the research design/processes; refine data collection and analysis; assess adequacy of data sources; examine selection and enrolment processes; and assess the participants' perspective on participating.
Criteria for assessing the adequacy of epidemiologic studies include selection and characterization of exposed and reference groups, identification and characterization of confounding factors and bias, duration of follow-up in view of cancer's latent period, ascertainment of causes of disease and death, and power to detect specific effects.
Selection (4 items): adequacy of case definition; representativeness of the cases; selection of controls; and definition of controls.
The methodological quality of the included studies was evaluated based on the Newcastle Ottawa Scale (NOS) [ 22], by appraising the following characteristics (an example for case control and cross-sectional studies): Selection (4 items): adequacy of case definition; representativeness of the cases; selection of controls; and definition of controls.
Finally, a clear description of selection criteria and adequacy of spectrum composition, which are essential quality items for diagnostic accuracy studies, were reported in only 51 and 62% of studies, respectively.
Three questions assessed the statistical methodology: adequacy of sample size, risk factor selection and model strategy choice.
