Data were extracted from each of the eligible studies by one of the authors (SL), under the following headings: study purpose; study design; duration of follow up; location; patient population; number of subjects; instrument and mode of entry; and outcome measures.
The GRCQ is a subjective instrument and subject to recall bias.
Such a structure would include subjects, instruments, and environments, while the environments encompass the concepts of rules, community, and division of duties.
The framework embraces AT elements such as agencies (subjects), instruments (tools), artifacts (outcomes), and environments, while environments encompasses the concepts of rules, community, and division of duties.
Direct comparison of these studies with our data is limited by differences in setting, subjects, instruments and other factors.
The study is also limited in that we used slightly different approaches in sampling (sample population from eastern Kenya were all exposed) and in questioning the study subjects (instruments differed slightly between sites).
In this in vitro study, raw materials (including stainless steel, conventional superelastic nickel-titanium [NiTi], M-Wire NiTi, and Vortex Blue NiTi) were used to create ProFile Vortex designed 25/.06 instruments and subject these instruments to testing for fatigue resistance, torsional properties, flexibility, and Vickers microhardness.
All the participants were able to read and understand the questionnaire in English language; hence we did not have to subject the instrument to translations into local languages.
The two components of measurement error are systematic bias, e.g., learning or fatigue effects on the test, and random error due to inherent subject or instrument variation [ 13].
The two components of measurement error are systematic bias, e.g., learning or fatigue effects during the test, and random error due to inherent subject or instrument variation.
