Variable Categories N Mean ± SD t-test df P-value Age Male 41 54.34 ± 13.69 2.056 73 0.043* Female 34 47.32 ± 15.86 *p value ≤ 0.05 was significant *p value ≤ 0.01 was significant

Table 3: The mean difference of age of study population by gender.