I will specify the statistical methods for your clinical research project

Statistical analyses will be conducted using SPSS (version XX), R, or Stata. Continuous variables will be presented as mean ± standard deviation (SD) for normally distributed data or median with interquartile range (IQR) for non-normal data, while categorical variables will be reported as frequencies and percentages.

Normality will be assessed using the Shapiro-Wilk test and visual inspection of histograms and QQ plots. For comparisons between two independent groups, the independent samples t-test will be used for normally distributed variables and the Mann-Whitney U test for non-parametric data. Comparisons among more than two groups will be performed using one-way ANOVA or the Kruskal-Wallis test, as appropriate.

Associations between categorical variables will be evaluated using the Chi-square test or Fisher's exact test when expected cell counts are small. Correlations between continuous variables will be assessed using Pearson's correlation for parametric data or Spearman's rank correlation for non-parametric data.

Multivariable analyses will include logistic regression for binary outcomes and linear regression for continuous outcomes.