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Table 4 Comparison of the mean scores of the knowledge’s domains before and after the intervention in the two groups

From: A sex education program for teachers of preschool children: a quasi-experimental study in Iran

Domains (score range)

Group

Before intervention Mean ± SDa

After intervention Mean ± SDa

Paired t-test

Effect size

Pc

Principles of Sexual education (0–4)

Experimental Control

3.20 ± 0.82 3.20 ± 1.01 Pb = 1

3.82 ± 0.38 3.12 ± 1.11 Pb < 0.001

P < 0.001 p = 0.32

0.7

<0.001

Sexual identity (0–3)

Experimental Control

1.35 ± 0.83 1.52 ± 0.9 Pb = 0.37

2.77 ± 0.42 1.5 ± 0.93 Pb < 0.001

P < 0.001 P = 0.57

1.38

<0.001

Sexual development stages and correct approaches for sex education (0–7)

Experimental Control

4.87 ± 1.06 4.52 ± 1.06 Pb = 0.14

6.62 ± 0.54 4.47 ± 1.17 Pb < 0.001

P < 0.001 P = 0.48

1.94

<0.001

Children’s sexual questions (0–4)

Experimental Control

3.12 ± 0.82 2.92 ± 0.94 Pb = 0.31

3.87 ± 0.33 2.90 ± 0.92 Pb < 0.001

P < 0.001 P = 0.74

0.87

<0.001

Masturbation in children (0–5)

Experimental Control

3.55 ± 0.67 3.30 ± 0.79 Pb = 0.13

4.92 ± 0.26 3.30 ± 0.75 Pb < 0.001

P < 0.001 P = 1

1.49

<0.001

child sexual abuse (0–8)

Experimental Control

5.90 ± 1.29 5.67 ± 1.5 Pb = 0.47

7.45 ± 0.67 5.62 ± 1.5 Pb < 0.001

P < 0.001 P = 0.42

1.67

<0.001

  1. aStandard Deviation bIndependent- samples t- test cDerived from ANCOVA adjusted for baseline score