Statistical analysis
CIN
CIN
Analyst was blinded about the treatment group. Quantitative variables were described using mean and standard deviation. Qualitative variables were described using frequencies and percentages. For the contrast of quantitative variables with normal distribution, Student´s t-distribution and paired sampled t-test was used. For the contrast of frequencies, the Chi squared test with Yates correction was used. For the contrast of quantitative variables between groups Mann-Whitney U tests were performed. For the contrast of quantitative variables within groups, the Wilcoxon signed-rank test was used. For comparing repeated measures within groups, Friedman test was done. Kaplan–Meier survival analysis was performed to estimate the survival function of CIN in the MMC and IFNα2b groups. Survival curves comparison was performed by the Mantel-Cox test. A statistically significant 