Table 2 Comparison of scores (theoretical knowledge) between two groups before and after teaching

Concept and classification of VD-related diseases

8.85 ± 3.00

8.24 ± 2.80

1.47

0.14

13.01 ± 3.27

15.23 ± 2.84

−5.10

< 0.01

Symptoms of different VD-related diseases

8.08 ± 3.17

8.00 ± 2.41

0.20

0.84

11.35 ± 2.57

12.53 ± 2.13

−3.49

< 0.01

Signs of different VD-related diseases

7.96 ± 1.67

7.68 ± 2.09

1.05

0.29

11.49 ± 2.67

15.58 ± 2.68

−10.72

< 0.01

Treatment of different VD-related diseases

8.44 ± 2.28

8.34 ± 2.10

0.32

0.75

11.17 ± 2.63

13.43 ± 2.68

−5.99

< 0.01

Diagnosis and differential diagnosis

9.32 ± 1.92

8.66 ± 1.73

2.56

0.01

12.59 ± 2.06

13.85 ± 1.97

−4.41

< 0.01

Total score

42.66 ± 6.68

40.92 ± 5.77

1.96

0.06

59.62 ± 6.78

70.62 ± 6.03

−12.06

< 0.01