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. Author manuscript; available in PMC: 2013 Aug 16.
Published in final edited form as: J Adolesc Health. 2012 Oct 8;52(1):77–82. doi: 10.1016/j.jadohealth.2012.08.001

Table 2.

Predictors of dual method use at 12 months

Variable Unadjusted OR (95% CI)a
N = 1,018
Adjusted OR (95% CI)b
N = 1,012
Baseline condom use
 <80% of time 1 (reference) 1 (reference)
 ≥80% of time 2.40 (1.62–3.58)*** 2.01 (1.28–3.14)**
Prior sexually transmitted infectionc 1.35 (.93–1.96) 1.55 (.94–2.55)
Prior pregnancy 1.11 (.75–1.65) 1.18 (.73–1.88)
Perceived STI risk in next 3 months
 Not at all/a little/somewhat likely 1 (reference) 1 (reference)
 Very likely .89 (.56–1.42) .54 (.30–.99)*
Partner concurrency (other than main) .77 (.42–1.41) .73 (.38–1.40)
Main partner views of condoms
 Not at all important 1 (reference) 1 (reference)
 Somewhat important 1.65 (.86–3.20) 1.55 (.78–3.10)
 Very important 3.45 (1.88–6.34)*** 2.89 (1.47–5.71)**
 Don’t know 2.45 (1.25–4.81)* 2.99 (1.35–6.64)**
Believes should always use condoms, even if on birth controld
 Strongly disagree 1 (reference) 1 (reference)
 Disagree .29 (0.05–1.72) .48 (.07–3.13)
 Neither .91 (019–4.27) 1.54 (.30–7.78)
 Agree .93 (.20–4.24) 1.41 (.29–6.89)
 Strongly agree .97 (.21–4.41) 1.07 (.22–5.15)
*

p < .05,

**

p < .01,

***

p < .001.

a

n = 1,018 as 176 women were missing data for dual method use at 12 months.

b

Adjusted for age, race/ethnicity, and clinic site.

c

Individuals who were missing on STI history were categorized as missing as to include in multivariable analysis.

d

n = 1,012 because of missing data.