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TABLE 1

Imputed Means and Probabilities of Adolescent Sexual Behaviors Over 30 Months by Intervention Condition

Imputed Mean or Probability (95% CI)Adjusted Effect Sizea (95% CI)
ER (n = 222)HP (n = 198)
Full sample  
 No. vaginal or anal sex actsb 3.12 (1.55 to 4.69) 5.77 (2.51 to 9.03) ARR = 0.39 (0.20 to 0.77)* 
 No. condomless vaginal or anal sex actsb 1.28 (0.34 to 2.22) 3.46 (0.91 to 6.01) ARR = 0.36 (0.14 to 0.90)* 
 Any sexual risk behaviorc 0.21 (0.16 to 0.26) 0.29 (0.23 to 0.35) aOR = 0.52 (0.32 to 0.84)* 
 Any multiple partners (2+ in 6-mo period) 0.13 (0.09 to 0.17) 0.18 (0.12 to 0.24) aOR = 0.54 (0.30 to 0.99)* 
 Any condomless vaginal or anal sex 0.15 (0.10 to 0.20) 0.15 (0.10 to 0.20) aOR = 0.81 (0.45 to 1.45) 
 Any substance use before sex 0.13 (0.09 to 0.17) 0.20 (0.14 to 0.26) aOR = 0.42 (0.23 to 0.75)* 
Among sexually actived  
 No. vaginal or anal sex actsb,e 10.67 (2.87 to 18.47) 14.04 (6.61 to 21.47) ARR = 0.57 (0.32 to 0.99)* 
 No. condomless vaginal or anal sex actsb,e 5.71 (−1.32 to 12.74) 8.66 (2.49 to 14.83) ARR = 0.53 (0.24 to 1.17) 
 Any sexual risk behaviorc 0.50 (0.40 to 0.60) 0.58 (0.48 to 0.68) aOR = 0.66 (0.39 to 1.13) 
 Any multiple partners (2+ in 6-mo period) 0.30 (0.21 to 0.39) 0.36 (0.26 to 0.46) aOR = 0.70 (0.38 to 1.30) 
 Any condomless vaginal or anal sex 0.36 (0.26 to 0.46) 0.30 (0.21 to 0.39) aOR = 1.08 (0.59 to 1.97) 
 Any substance use before sex 0.30 (0.21 to 0.39) 0.40 (0.30 to 0.50) aOR = 0.52 (0.28 to 0.95)* 
Imputed Mean or Probability (95% CI)Adjusted Effect Sizea (95% CI)
ER (n = 222)HP (n = 198)
Full sample  
 No. vaginal or anal sex actsb 3.12 (1.55 to 4.69) 5.77 (2.51 to 9.03) ARR = 0.39 (0.20 to 0.77)* 
 No. condomless vaginal or anal sex actsb 1.28 (0.34 to 2.22) 3.46 (0.91 to 6.01) ARR = 0.36 (0.14 to 0.90)* 
 Any sexual risk behaviorc 0.21 (0.16 to 0.26) 0.29 (0.23 to 0.35) aOR = 0.52 (0.32 to 0.84)* 
 Any multiple partners (2+ in 6-mo period) 0.13 (0.09 to 0.17) 0.18 (0.12 to 0.24) aOR = 0.54 (0.30 to 0.99)* 
 Any condomless vaginal or anal sex 0.15 (0.10 to 0.20) 0.15 (0.10 to 0.20) aOR = 0.81 (0.45 to 1.45) 
 Any substance use before sex 0.13 (0.09 to 0.17) 0.20 (0.14 to 0.26) aOR = 0.42 (0.23 to 0.75)* 
Among sexually actived  
 No. vaginal or anal sex actsb,e 10.67 (2.87 to 18.47) 14.04 (6.61 to 21.47) ARR = 0.57 (0.32 to 0.99)* 
 No. condomless vaginal or anal sex actsb,e 5.71 (−1.32 to 12.74) 8.66 (2.49 to 14.83) ARR = 0.53 (0.24 to 1.17) 
 Any sexual risk behaviorc 0.50 (0.40 to 0.60) 0.58 (0.48 to 0.68) aOR = 0.66 (0.39 to 1.13) 
 Any multiple partners (2+ in 6-mo period) 0.30 (0.21 to 0.39) 0.36 (0.26 to 0.46) aOR = 0.70 (0.38 to 1.30) 
 Any condomless vaginal or anal sex 0.36 (0.26 to 0.46) 0.30 (0.21 to 0.39) aOR = 1.08 (0.59 to 1.97) 
 Any substance use before sex 0.30 (0.21 to 0.39) 0.40 (0.30 to 0.50) aOR = 0.52 (0.28 to 0.95)* 

Imputed means and probabilities estimates result is from 50 multiple imputations generated by using chained equations. CI, confidence interval.

a

aOR; ARR.

b

Behavioral counts converted into yearly rates.

c

“Any sexual risk behavior” defined by composite measure containing any multiple partners (in a 6-mo period), any condomless vaginal or anal sex, or any substance use in the 4 h before sex during the 30 mo study period.

d

Those who reported vaginal or anal sex at baseline or at any follow-up.

e

Behavioral counts from the assessment of vaginal or anal debut until the end of the 30 mo follow-up.

*

P < .05.

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