2.4. Statistical analysis
Statistical Package Software for Social Science (SPSS) version 18 was used to analyze the data, and P < 0.05 was considered statistically significant. Continuous variables were assessed using the mean and standard deviation, while categorical variables were evaluated using frequency and percentage. The Analysis of Variance (ANOVA) test was used to examine the relationship between means of age, time of cancer diagnosis, hospital admissions, chemotherapy and radiotherapy sessions, and circadian rhythm types. Furthermore, Fisher’s exact test was used to determine the relationship between chronotype and gender, educational level, marital status, patient condition, treatment methods, occupation, and type of cancer. Kolmogorov-Smirnov analysis was used to verify the normality of the variable distribution.