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2.4. Statistical Analysis
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The Kolmogorov-Smirnov test was used to identify the normality of distribution. The categorical data were analysed using the Fisher's exact test of chi-square tests. The independent t-test and Mann–Whitney U test were used to compare other parameters between groups. The diagnostic significances for OIS were evaluated using the ROC curve. All reported p values were two-sided. A p value <0.05 was considered statistically significant. Statistical analysis was performed using the IBM SPSS software version 21.
Copyright and License information: ©2017 Hui Wang et al.
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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