Table 5

Reliability and difficulty coefficient of subscale 1

Domain	Corrected Item-Total correlation	Cronbach's α If Item Deleted	Difficulty coefficient
(1) Infectious disease-related knowledge and values including transmission of infectious diseases		0.652*
Q6	0.387	0.810	4.08
Q10	0.316	0.761	1.19
Q11	0.417	0.755	1.41
Q12	0.384	0.757	1.22
Q13	0.363	0.758	1.21
Q15	0.394	0.758	1.34
Q28	0.462	0.771	2.72
(2) Infectious disease prevention		0.672*
Q19	0.452	0.762	1.19
Q22	0.420	0.765	1.89
Q24	0.504	0.757	1.32
Q25	0.484	0.759	1.39
Q29	0.364	0.760	1.34
Q30	0.470	0.759	1.36
Q31	0.418	0.762	1.47
(3) Management or treatment of infectious diseases		0.599*
Q3	0.350	0.765	2.39
Q4	0.323	0.762	1.96
Q7	0.357	0.754	1.57
Q16	0.356	0.756	1.89
(4) Identification of pathogens and infection sources		0.632*
Q18	0.390	0.756	1.88
Q21	0.459	0.759	2.38
Q23	0.481	0.752	1.97
Q26	0.391	0.756	1.45
Overall		0.839*