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Statistical analysis

GS Gontar Siregar
SH Sahat Halim
RS Ricky Sitepu
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SPSS version 22 (SPSS Inc., Chicago) was used for analysis. The data were analysed using univariate and bivariate analysis with 95% confidence intervals. The results were expressed as the mean ± standard deviation. Bivariate analysis was carried out using the independent t-test, Mann-Whitney test, and Chi-square test with a p-value < 0.05 was considered statistically significant.

Copyright and License information:  ©2016 Gontar Siregar, Sahat Halim, Ricky Sitepu.
This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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