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Statistical analysis

JH José Rubén Herrera-Atoche
CM Carlos Roberto Medina-Mazariegos
IZ Iván Daniel Zúñiga-Herrera
GC Gabriel Eduardo Colomé-Ruiz
FA Fernando Javier Aguilar-Ayala
AP Alicia Leonor Pinzón-Te
FA Fernando Javier Aguilar-Pérez
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All statistical analysis was achieved with SPSS version 20. The Shapiro–Wilk and Levene's tests were employed to analyze normality of data and homogeneity of variance. Regarding the results of the previously described analysis, student's t-test, Z-test, or U Mann–Whitney analysis was used when comparing two samples in accordance with tests assumptions (P < 0.05); for three or more samples, ANOVA with Tukey as post hoc or Kruskal–Wallis tests were used (P < 0.05).

Copyright and License information:  ©2020 Association for Dental Sciences of the Republic of China. Publishing services by Elsevier B.V.
This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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