Statistical analysis
Descriptive statistics were used to characterize the basic features of the data in the study. We compared the features of patients who had contributory tests to those who had non-contributory ones. We used the Chi-square test and Fisher’s exact test for categorical variables, and the T-test and Mann Whitney U test for continuous variables, as appropriate. A p-value of less than 0.05 was considered significant in all the tests. Parameters found to be significantly associated with contributory results of PET/CT (true positive) on univariate analysis were analyzed in a multivariate analysis using forward step logistic regression analysis.