Statistical Analysis And Ethics
The Statistical Package for the Social Sciences software version 25.0 (IBM Corp., Armonk, NY, the USA) was used for data analysis. Variables were expressed as mean ± standard deviation, percentage, and frequency. Categorical data were analyzed using the Fisher’s exact test and the chi-square test. P<0.05 and <0.01 were acceptable. The possible risk factors identified in the univariate analyses were further used in the multivariate analysis to determine the independent predictors of CCAP. For subgroup analyses, unadjusted odds ratio (OR) and relative 95% confidence interval (CI) were used, and a p≤0.005 was considered significant.