Table 5 Results of multilevel analysis to assess intervention effects on STI testing: complete cases analysis (n = 472)

Measures of variation of clustering:

Class level variance (SE)

1.72(0.56)

1.25(0.49)

ICC Class level

0.34

0.28

Individual level variables:

Beta (SE)

OR (95%CI)

p-value

Beta

OR (95%CI)

p-value

Sex (female vs male)

1.35(0.41)

3.86 (1.72-8.66)

< 0.01

1.05 (0.42)

2.84 (1.24-6.46)

< 0.05

Ethnicity (Dutch vs non-Dutch)

-0.43(0.37)

0.65 (0.29-1.45)

0.29

-0.50 (0.37)

0.61 (0.30-1.25)

0.17

Baseline test behavior

1.16(0.36)

3.18 (1.57-6.45)

< 0.001

1.24 (0.37)

3.46 (1.66-7.19)

< 0.001

Intervention group 1^a

1.46 (0.71)

4.25 (1.07-17.25)

< 0.05

Intervention group 2^b

-0.06 (0.78)

0.94 (0.21-4.31)

0.92

Intervention group 3^c

0.96 (0.71)

1.70 (0.64-10.56)

0.18