Statistical analysis

HY Hua-Wei Yin
JF Jun-Tao Feng
BY Bao-Fu Yu
YS Yun-Dong Shen
YG Yu-dong Gu
WX Wen-dong Xu
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Student t test and proportion t test were used to compare respectively continuous variables and binary variables of the patients at baseline between the two groups. The mean of evaluations within each group was analysed with a paired t test. The changes of the evaluations were analysed with Student t test between the two groups. A p value of 0.05 was considered statistically significant.

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