Understanding biostatistics: A study of Nigerian dental resident doctors
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Date
2014-07-30
Authors
Akinsola, O.J.
James, O.
Ibikunle, A.A.
Adeyemo, W.L.
Journal Title
Journal ISSN
Volume Title
Publisher
Nigerian Journal of Experimental and Clinical Biosciences
Abstract
Background: Central to the process of keeping current with clinical information in dentistry is
the ability of a practitioner to evaluate the reliability and validity of current scientifi c evidence.
Pertinent to this is a basic understanding of statistics. The level of understanding of biostatistics
has not been reported among Dental resident doctors in Nigeria. Aim: The purpose of this
study was to evaluate dental residents’ understanding of biostatistics and the interpretation
of research results. Materials and Methods: This was a study carried out among dental
resident doctors who attended the revision course organized by the Faculty of Dental Surgery,
National Postgraduate Medical College of Nigeria in March 2013. A cross-section of dental
resident doctors at the Lagos University Teaching Hospital was also included in the study.
Data collected through a self-administered questionnaire included demographic characteristics
of the residents, their attitudes toward statistics, and their confi dence about interpreting
and assessing statistical concepts. Residents’ knowledge of statistics was also tested by
asking some basic statistical questions. Results: Eighty-one respondents completed the
questionnaire. About two-third (66.7%) had taken a course in epidemiology; and 60.5% had
taken a course in biostatistics. Only a quarter (25.9%) of respondents could correctly identify
that “lower facial height in centimeters” as a continuous variable, and 23.5% thought that
centimeters was a nominal measure of facial height. “Facial asymmetry classifi ed as none,
moderate, severe” was correctly identifi ed as an ordinal variable by only a third (35.8%) of the
respondents. Two keys to the highest level of evidence in a study are blinding and controls.
Sixty-eight percent of the respondents correctly identifi ed that this avoids observer and subject
bias. However, only about one-fi fth (22.2%) correctly identifi ed that a P > 0.05 (not statistically
signifi cant) indicates at least a 1-in-20 chance occurrence. Overall, respondents’ knowledge
of biostatistics was low, with only 29% of the item answered correctly. Conclusion: Most
residents in this study lack the knowledge in biostatistics needed to interpret many of the
results in published clinical research. Because clinicians need to have such skills to engage
in evidence-based practice, every effort needs to be made to include effective training in
biostatistics during undergraduate and residency training programs.
Description
Keywords
Biostatistics , Resident doctors , Nigeria , Dental
Citation
Akinsola OJ, James O, Ibikunle AA, Adeyemo WL. Understanding biostatistics: A study of Nigerian dental resident doctors. Nigerian Journal of Experimental and Clinical Biosciences 2014;2:100-104