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These studies have typically used sample sizes of around 40 (e.g. Neuhoff et al., 2009).
Most previous clinical studies comparing retrospective and prospective data used sample sizes ranging from 52 to 214 participants [11 15].
These studies have typically used sample sizes of around 30 per condition (Neuhoff et al., 2014, 2009).
Interestingly, 50.4% (n = 53) of the studies used sample sizes smaller than the rule of thumb, which is a minimum of 10 participants for each item in the scale.
Continuous monitoring with a likelihood based method, on the other hand, has the advantages that all available information, including new data, can be used; sample sizes need not be fixed; and decisions can be made at any time without statistical penalty, irrespective of trial design.
The differences can be attributable to the highly different methodologies including the orthodontic technique applied, laser dosimetry and parameters, the number of laser irradiation sessions, the laser types used, sample sizes, age ranges, gender compositions, analgesic consumption, and many other factors [15].
Similar(42)
Although a convenience sample of available records was used, sample size was calculated to demonstrate external validity.
We used sample size as weight estimation in all models to correct for slightly different sampling effort among populations.
Only three studies used sample size estimations in the development of the study.
Overall, this means that C3NET is sensitive to the used sample size.
Only one study used sample size justification in the development of the study.
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