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Statistical analysis

ZY Zhiyuan Yang
ZX Zhouliang Xie
XP Xueliang Pei
XQ Xiaoqiang Quan
DF Deguang Feng
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IBM SPSS Statistics 21 software (IBM Corp., Armonk, NY, USA) was used to analyze the data. Quantitative data are described with difference between the two groups as mean ± standard deviation, and assessed using t-test. Numeration data variables were expressed as frequencies and percentages and performed with χ2 test to compare the difference. The one-way analysis of variance (ANOVA) with the least significant difference test was used to correct the variables. Count data were expressed by percentage (%) and assessed with χ2 test. Difference with P<0.05 was considered statistically significant.

Copyright and License information:  ©2018 Yang et al.
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