Table 2 Mixed-effects model assessing the association between implementation strategies and teachers’ implementation fidelity

Intercept

16.535

5.463

3.03

0.007

 Associate degree/teaching certificate

−1.375

2.107

−0.65

0.517

 Bachelor’s degree

−0.532

1.106

−0.48

0.633

 Master degree (ref)

0

Comfort level with the curriculum

1.856

1.279

1.45

0.154

Confidence in implementing core activities

−0.167

0.616

−0.27

0.787

Attitudes towards sex education in schools

−1.942

0.995

−1.95

0.058

Perceived principal support

0.637

0.728

0.88

0.386

Teachers’ self-efficacy

2.081

0.780

2.67

0.011

 Excellent

6.829

2.846

2.40

0.021

 Very good

5.943

2.223

2.67

0.011

 Satisfactory

0

 Very good

2.229

2.390

0.93

0.357

 Satisfactory

−0.564

2.193

−0.26

0.798

 No mentor

0

 School

14.519

6.258

2.32

0.010