Statistical analysis
Quantitative data were described by median and enumeration data was
expressed as a percentage(%).We
conduct Chi-square statistical
significant test on categorical variables and Fisher’s exact test on
observations which were less than five in number.The final follow-up was
on march, 2020 and the median follow-up time was 14 months (range: 1 to
39 months). Event-free survival (EFS) was calculated from the time point
of diagnosis until the following
events:induction treatment failure,any relapse
afterCR,second malignancy
(SMN),death due to any cause. Survival rates were calculated and
compared using Kaplan–Meier analysis and log-rank tests on univariable
data.Cox regression analysis for multivariate data.Variables that were
found statistically significant or P -value approximate to 0.1
will be included in multivariable Cox regression analysis.Statistical
significance was defined as a P -value of less than 0.05.All
analyses were performed using SPSS 23.0 software.