Table 2.

Knowledge test score analysis

Group		N	Min-max	Mean	SD
Total	Pre-test	17	65.0-95.0	79.1%	10.3
	Direct post-test	18	65.0-100	86.5%	11.6
	1-year post-test	18	70.0-100	89.2%	7.91
	Paired t-test (2-tailed)	Mean difference	T-statistic	95% CI interval	P-value
	Pre-test – direct post-test	−0.0735	−3.92	−0.113 to −0.034	0.0012
	Pre-test – 1-year post-test	−0.097	−4.17	−0.146 to −0.048	0.0007
		N	Min-max	Mean	SD
FHWs	Pre-test	15	65.0-95.0	81.0%	9.49
	Direct post-test	15	65.0-100	88.7%	10.3
	1-year post-test	15	75.0-100	89.7%	6.67
	Paired t-test (2-tailed)	Mean difference	T-statistic	95% CI interval	P-value
	Pre-test – direct post-test	−0.0767	−3.72	−0.121 to −0.032	0.0023
	Pre-test – 1-year post-test	−0.0733	−3.21	−0.122 to −0.024	0.0015
		N	Min-max	Mean	SD
TBSs	Pre-test	2	65.0-65.0	65.0%	0.00
	Direct post-test	3	65.0-75.0	71.7%	5.77
	1-year post-test	3	70.0–95.0	86.7%	14.4