Data analysis
REGRESSION
Data analysis was done using SPSS version 21 statistical software. In order to investigate the difference between the two intervention and control groups, the χ2 test and student t-test were used for categorical variables. One-way ANOVA test was used to evaluate the difference between bowel cleanliness scores in the two groups. In addition, univariate or multivariate regression analysis was used to find the influencing factors in bowel cleansing. A significance level was considered as P < 0.05. The sample size in each group was calculated at 131 people according to the prior pilot study and the mean ± SD for the intervention and control group (6.5 ± 1.8 and 5.6 ± 3.06, respectively).


