Table 6 Negative binomial multivariable model for syphilis testing in the prior 12 months

 Age (years)

  17–19

Reference

  20–24

1.59 (0.8)

0.62–4.11

1.54 (0.6)

0.73–3.27

  25–29

1.59 (0.8)

0.62–4.05

1.38 (0.5)

0.65–2.91

  30–34

1.49 (0.7)

0.56–3.97

1.12 (0.4)

0.49–2.52

  35 +

1.26 (0.7)

0.42–3.78

1.00 (0.5)

0.41–2.46

 Level of education

  None

Reference

  Primary

0.88 (0.3)

0.47–1.65

0.98 (0.2)

0.62–1.56

  Secondary

0.75 (0.2)

0.40–1.39

0.97 (0.2)

0.61–1.55

  Higher education

0.71 (0.3)

0.33–1.49

1.39 (0.4)

0.73–2.66

 Marital status

  Married

Reference

  Separated

0.84 (0.3)

0.40–1.75

1.23 (0.3)

0.71–2.13

  Widow

1.17 (0.7)

0.37–3.73

1.63 (0.7)

0.71–3.74

  Single

0.82 (0.3)

0.39–1.69

1.23 (0.3)

0.72–2.11

  Have regular boy/girlfriend

1.12 (0.4)

0.53–2.34

1.34 (0.4)

0.79–2.27

 Study site

  Kampala

Reference

  Mbarara

0.69 (0.1)

0.49–0.97

1.06 (0.2)

0.79–1.41

 Sex

  Male

Reference

  Female

3.0 (0.6)

1.99–4.55

1.08 (0.3)

0.64–1.84

 Condom use

  Yes

Reference

  No

0.53 (0.1)

0.37–0.78

0.89 (0.2)

0. 64–1.27

 SYP_INT

  Score ≥ 9, median

Reference

  Score < 9, median

0.16 (0.02)

0.11–0.22

0.32 (0.1)

0.22–0.47

 SYP_ATT

  Score ≥ 8, median

Reference

  Score < 8, median

0.22 (0.03)

0.15–0.31

0.43 (0.1)

0.30–0.61

 SYP_MN

  Score ≥ 8, median

Reference

  Score < 8, median

0.28 (0.04)

0.19–0.39

0.63 (0.1)

0.45–0.88

 SYP_SE

  Score ≥ 3, median

Reference

  Score < 3, median

0.12 (0.03)

0.064–0.21

0.39 (0.1)

0.21–0.74