Table 3 Univariate and multivariate analyses

Baseline age

   ≥ 29 years

1

1

1

   <29 years

1.18

1.03,1.35

0.019

1.15

1.01,1.33

0.041

Language spoken at home

   English

1

1

   Zulu/others

1.89

1.51,2.36

<0.001

1.50

1.18,1.91

0.001

Marital status

   Yes

1

-

   No

5.47

4.21,7.10

<0.001

-

Cohabiting

   Yes

1

1

   No

1.91

1.63,2.22

<0.001

1.23

1.02,1.47

0.030

Age at first Sex

   < 15 years

1.67

1.30,2.13

<0.001

1.47

1.12,1.93

<0.001

   ≥ 15 years

1

1

Regular sex partner

   No

1

1

   Yes

5.05

3.92,6.50

<0.001

4.69

3.52,6.26

<0.001

Lifetime male sex partner

   <4

1

1

   ≥ 4

2.85

2.43,3.32

<0.001

2.35

2.00,2.78

<0.001

Tested positive for Gonorrhea

   Yes

2.55

1.68,3.86

<0.001

1.68

1.20,1.75

0.02

   No

1

1

Tested positive for HSV

   Yes

7.00

5.70,8.56

<0.001

6.65

5.36,8.24

<0.001

   No

1

1

Exchange of sex for money

   Yes

3.37

1.71,6.64

<0.001

-

   No

1

Ever had sex using male condom

   Yes

1.38

1.18,1.60

<0.001

-

   No

1

Contraceptive use at screening ¹

   Yes

1

1

   No

1.37

1.17,1.61

<0.001

1.45

1.20,1.75

<0.001

Nonlinear component

Nonlinear component

Geographical component

Degrees of freedom

knots

Degrees of freedom

knots

   Longitude, Latitude

26.4

50

22.3

50