Table 3.22: Comparison students' communication skill scores 9 weeks and 2 years after intervention Students' communication skill score 9 weeks after intervention after 2 years intervention Difference (score) p Intervention group (n=93) 47, 12±12, 93 60, 07±11, 18 12, 95 <0, 001 Control group (n=94) 43, 01±11, 34 48, 67±13, 07 5, 66 <0, 01 Difference (score) 4, 11 11, 31 p <0, 05 <0, 001 Comment: The difference between the 9 weeks and 2 years after intervention in the intervention group was 12.95 points, while that in the control group was only 5.66 points, the difference was statistically significant.