Table 1. The mean and standard deviation of knowledge test scores and psychomotor skills scores before training, immediately after training and re-test (10 weeks and 2years after training).

Kind of test	No	%	Mean	SD	Test P value
Knowledge pre-test	112	54.75	10.67	3.06	Repeated measures ANOVA
Knowledge post-test	112	89.80	17.81	1.41
10 weeks after Knowledge post-test	112	80.60	15.26	3.17
Knowledge after 2 years	42	64.30	12.86	2.25	P<0.001
Psychomotor skills pre-test	112	18.70	5.38	5.24
Psychomotor skills post-test	112	93.30	24.55	1.3
10 weeks after psychomotor skills post-test	112	82.50	21.5	4.38
Psychomotor skills after 2 years	42	36.81	9.57	5.46