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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Korean+Assoc+Oral+Maxillofac+Surg
2018 ; 44
(1
): 25-28
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Survey of the use of statistical methods in Journal of the Korean Association of
Oral and Maxillofacial Surgeons
#MMPMID29535966
Choi YG
J Korean Assoc Oral Maxillofac Surg
2018[Feb]; 44
(1
): 25-28
PMID29535966
show ga
OBJECTIVES: This study aimed to describe recent patterns in the types of
statistical test used in original articles that were published in Journal of the
Korean Association of Oral and Maxillofacial Surgeons. MATERIALS AND METHODS:
Thirty-six original articles published in the Journal in 2015 and 2016 were
ascertained. The type of statistical test was identified by one researcher.
Descriptive statistics, such as frequency, rank, and proportion, were calculated.
Graphical statistics, such as a histogram, were constructed to reveal the overall
utilization pattern of statistical test types. RESULTS: Twenty-two types of
statistical test were used. Statistical test type was not reported in four
original articles and classified as unclear in 5%. The four most frequently used
statistical tests constituted 47% of the total tests and these were the
chi-square test, Student's t-test, Fisher's exact test, and Mann-Whitney test in
descending order. Regression models, such as the Cox proportional hazard model
and multiple logistic regression to adjust for potential confounding variables,
were used in only 6% of the studies. Normality tests, including the
Kolmogorov-Smirnov test, Levene test, Shapiro-Wilk test, and Scheffé's test, were
used diversely but in only 10% of the studies. CONCLUSION: A total of 22
statistical tests were identified, with four tests occupying almost half of the
results. Adoption of a nonparametric test is recommended when the status of
normality is vague. Adjustment for confounding variables should be pursued using
a multiple regression model when the number of potential confounding variables is
numerous.