Table 4 Two-level linear mixed regression on changes in mean (95% CI) scores of HIV-related knowledge in the intervention and control groups at both follow-ups

Basic HIV

information

1.90

(1.63~2.17)

0.43

(0.17~0.68)

1.47

(1.10~1.85)

< 0.001

1.67

(1.35~1.99)

0.55

(0.17~0.93)

1.12

(0.62~1.62)

< 0.001

HIV risk

reduction

2.86

(2.47~3.25)

0.17

(-0.21~0.54)

2.69

(2.15~3.24)

< 0.001

2.34

(1.65~3.03)

0.91

(0.06~1.75)

1.43

(0.34~2.52)

0.011

Condom use

2.27

(1.97~2.56)

-0.17

(-0.45~0.12)

2.44

(2.03~2.84)

< 0.001

1.94

(1.23~2.66)

-0.19

(-1.08~0.70)

2.13

(0.99~3.28)

< 0.001

Sum

7.03

(6.39~7.66)

0.43

(-0.18~1.04)

6.60

(5.72~7.48)

< 0.001

5.87

(4.74~7.00)

1.20

(-0.20~2.59)

4.67

(2.88~6.47)

< 0.001