The results were analyzed using the statistical package for the social science version 10 (Echosoft Corp., Roswell, Georgia, USA). Quantitative and qualitative variables were described as mean ±SD and frequency and percentage, respectively. Student’s t test of two independent samples and the Pearson correlation coefficient test (r-test) were used to compare different variables against each other either directly or indirectly. Stepwise regression analysis was carried out to determine the relationship of data, where P less than 0.05 was considered significant for all comparisons.