Table 4

Scores in knowledge, attitude, self-efficacy, and communication: differences by study groups (mean ± SD)

Adolescents of migrant workers

(N = 252)

Adolescents of general residents

(N = 2569)

t

P-value

Scores in HIV/AIDS knowledge (% in total score)

Total

15.40 ± 6.10 (46.77)

18.89 ± 6.20 (60.93)

2.95^a

0.02

Male

16.12 ± 6.50 (52.00)

18.77 ± 6.47 (60.55)

Female

14.34 ± 5.46 (46.25)

19.20 ± 5.67 (61.94)

t

0.77^a

-1.77^a

P-value

0.46

0.08

Scores in attitude toward sex behaviors (% in total score)

Total

14.52 ± 2.62) (90.75)

14.27 ± 2.86 (89.19)

-1.06^a

0.29

Male

14.01 ± 3.21) (87.56)

13.82 ± 3.22 (86.38)

Female

15.05 ± 1.72) (94.06)

14.73 ± 2.35 (92.06)

t

-2.32^a

-8.15^a

P-value

0.02

0.00

Scores in attitude toward person with HIV/AIDS (% in total score)

Total

10.07 ± 2.73 (71.93)

10.01 ± 2.82 (71.50)

-0.25^a

0.80

Male

10.20 ± 2.55 (72.86)

10.02 ± 2.91 (71.57)

Female

9.98 ± 3.01 (71.29)

10.04 ± 2.75 (71.71)

t

0.46^a

-0.20^a

P-value

0.64

0.84

Scores in protection self-efficacy (% in total score)

Total

5.41 ± 1.54 (67.62)

5.30 ± 1.39 (66.25)

0.86^a

0.39

Male

5.26 ± 1.74 (65.75)

4.99 ± 1.63 (62.38)

Female

5.60 ± 1.31 (70.00)

5.62 ± 1.04 (70.25)

t

-1.25^a

-11.14^a

P-value

0.21

0.00

Scores in communication on sex/HIV/AIDS issue (% in total score)

Total

0.89 ± 1.47 (11.13)

1.08 ± 1.50 (13.50)

0.87^a

0.38

Male

0.91 ± 1.54 (11.38)

1.04 ± 1.54 (13.00)

Female

1.03 ± 1.39 (12.88)

1.10 ± 1.46 (13.75)

t

-1.88^a

-0.21^a

P-value

0.83

0.06

Scores in HIV/AIDS knowledge, attitude toward sex behaviors, attitude toward person with HIV/AIDS, protection self-efficacy, and communication on sex/HIV/AIDS issue were normally distributed with statistics of Shapiro-Wilk = 0.93 (P < 0.01), 0.78 (P < 0.01), 0.95 (P < 0.01), 0.79 (P < 0.01), and 0.83 (P < 0.01), respectively.

^a Independent-samples t test

Li et al. BMC Public Health 2009 9:195   doi:10.1186/1471-2458-9-195