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Table 1 Logistic regression models for association of risk factors with STI prevalence

From: Identifying youth at high risk for sexually transmitted infections in community-based settings using a risk prediction tool: a validation study

Variable

 

N with STI/ total N (STI prevalence)

Univariable

Multivariable 1 (N = 957)

Multivariable 2 (N = 957)

  

OR (95% CI)

p

OR

p

OR

p

Age group

16–19

61/419 (14.6)

1

0.042

1

0.95

  

20–25

114/584 (19.5)

1.42 (1.01, 2.00)

1.01 (0.68, 1.51)

 

Sex

Male

23/214 (10.8)

1

0.004

1

0.001

1

0.001

Female

152/789 (19.3)

1.98 (1.24, 3.16)

2.77 (1.54, 4.98)

2.64 (1.52, 4.57)

Relationship status

Single

21/177 (11.9)

0.65 (0.39, 1.10)

0.005

1.48 (0.72, 3.04)

0.02

1.23 (0.67–2.27)

0.007

Boyfriend/girlfriend

70/368 (19.0)

1.14 (0.80, 1.64)

1.82 (1.05, 3.12)

1.70 (1.09–2.63)

Married

74/434 (17.1)

1

1

1

Divorced/widowed

10/24 (41.7)

3.47 (1.49, 8.12)

4.10 (1.50, 11.25)

3.71 (1.51–9.06)

New partner in the last 3 months

Yes

35/157 (22.3)

1.45 (0.95, 2.20)

0.083

0.69 (0.36, 1.30)

0.25

  

No

129/846 (16.6)

1

1

 

No of sexual partners in last 3 months

0

31/293 (10.6)

1

 < 0.001

1

0.16

  

1

119/623 (19.1)

2.00 (1.31, 3.04)

1.07 (0.54, 2.12)

 

2+ 

25/87 (28.7)

3.41 (1.88, 6.18)

2.09 (0.83, 5.25)

  

No of lifetime partners

0

11/186 (5.9)

1

 

1

0.004

1

 

1

54/388 (13.9)

2.57 (1.31, 5.04)

 < 0.001

2.19 (0.85, 5.64)

2.09 (0.98, 4.44)

 < 0.001

2 + 

110/429 (25.6)

5.49 (2.87, 10.47)

3.89 (1.47, 10.29)

3.98 (1.93, 8.19)

History of STI treatment

Yes

22/79 (27.9)

1.94 (1.15, 3.28)

0.012

0.75 (0.40, 1.40)

0.36

  

No

153/924 (16.6)

1

1

 

Partner ever had an STI

Yes

17/43 (39.5)

3.32 (1.76,6.26)

 < 0.001

1.90 (0.88, 4.07)

0.10

  

No

158/960 (16.5)

1

1

 

HIV status (N = 957)

Positive

18/50 (36.0)

2.79 (1.53, 5.11)

 < 0.001

2.05 (1.05, 4.01)

0.04

1.95 (1.02, 3.72)

0.04

Negative

152/907 (16.8)

1

1

1

Use of condoms (N = 817)

Always

15/116 (12.9)

0.70 (0.38, 1.28)

0.004

0.65 (0.32, 1.35)

0.12

  

Sometimes

82/319 (25.7)

1.63 (1.13, 2.34)

1.27 (0.81, 1.99)

 

Never

67/382 (17.5)

1

1

 

Perceived STI risk

None/low

93/721 (12.9)

1

 < 0.001

1

0.01

1

 < 0.001

Medium/high

82/282 (29.1)

2.77 (1.98, 3.88)

1.67 (1.12, 2.49)

1.98 (1.37, 2.87)

Use of hormonal contraception (N = 789)

Yes

87/451 (19.3)

1.00 (0.70, 1.44)

0.98

    

No

65/338 (19.2)

1

  

Past or current pregnancy (N = 789)

Yes

13/36 (36.1)

2.50 (1.23, 5.05)

0.011

2.70 (1.27, 5.78)

0.01

2.55 (1.21, 5.39)

0.014

No

139/753 (18.5)

1

1

1

  1. Multivariable Model 1: includes all potential risk factors and Multivariable Model 2: includes potential risk factors that were associated with STI infection in Model 1 ( female gender, relationship status, number of lifetime sexual partners, HIV status, perceived STI risk and past/current pregnancy)
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BMC Infectious Diseases

ISSN: 1471-2334

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