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Table 3 Regression Analyses With 3-Month Follow-up Behaviors as Outcomes and Controlling for Each Outcome Variable's Baseline Status*

From: Double jeopardy--drug and sex risks among Russian women who inject drugs: initial feasibility and efficacy results of a small randomized controlled trial

  Regression coefficient corresponding to the Baseline Status
Parameter Estimate (SE)a
/Odds Ratio (95% CI)b
Regression coefficient corresponding to the Intervention Group
Parameter Estimate (SE)
/Odds Ratio (95% CI)
  Parameter Estimate ( SE ) or Odds Ratio (95% CI )
Traded sex for drugs, money, clothing, shelter, or any other goods in past 90 days (yes) 1.02 (0.27-3.84)
Wald Χ2 = 0.001 (1), p = 0.98
0.92 (0.25-3.34)
Wald Χ2 = 0.02 (1), p = 0.90
Any protected last sex act with main sex partner (yes) 0.23 (0.05-1.00)
Wald Χ2 = 3.87 (1), p = 0.05
1.66 (0.46-6.03)
Wald Χ2 = 0.60 (1), p = 0.44
Mean number of unprotected vaginal sex acts with main sex partner in past 30 days 0.24 (0.09)
t = 2.69 (1), p = 0.01
-4.56 (1.64)
t = -2.77 (1), p = 0.008
Mean number of unprotected sex acts with sex- trading partner in past 30 days -0.07 (0.25)
t = -0.27 (1), p = 0.79
-9.18 (14.58)
t = -0.63 (1), p = 0.54
Impaired last sex (yes)   
   Participant 0.18 (0.04-0.78)
Wald Χ2 = 5.26 (1), p = 0.02
1.43 (0.47-4.29)
Wald Χ2 = 0.40 (1), p = 0.53
   Partner 0.17 (0.05-0.54)
Wald Χ2 = 9.13 (1), p = 0.003
0.31 (0.10-0.98)
Wald Χ2 = 3.97 (1), p = 0.05
Impaired last unprotected vaginal intercourse (yes) 0.02 (0.004-0.07)
Wald Χ2 = 30.75 (1), p < 0.0001
0.91 (0.22-3.83)
Wald Χ2 = 0.02 (1), p = 0.90
Mean number of injections in past 30 days 0.25 (0.12)
t = 2.07 (1), p = 0.04
-3.90 (9.26)
t = -0.42 (1), p = 0.67
Mean number of times used cotton, cooker/spoon, or rinse water used by someone else in past 30 days 0.01 (0.02)
t = 0.57 (1), p = 0.57
-1.16 (0.83)
t = -1.39 (1), p = 0.18
Mean number of times someone else used your cotton, cooker/spoon, or rinse water in past 30 days 0.01 (0.02)
t = 0.36 (1), p = 0.72
-0.56 (0.69)
t = -0.81 (1), p = 0.42
Mean number of times injected drugs mixed with water from someone else's syringe in past 30 days (i.e. syringe-mediated drug sharing) 0.01 (0.01)
t = 0.48 (1), p = 0.63
-0.76 (0.47)
t = -1.61 (1), p = 0.12
Mean number of days injected heroin in past 30 days 0.21 (0.24)
t = 0.88 (1), p = 0.38
-1.27 (2.76)
t = -0.46 (1), p = 0.65
  1. *The regression has the form: Outcome = Intercept + b1* Baseline Status+ b2* Intervention Group + error or Logit[P(Outcome = 1)] = Intercept + b1* Baseline Status+ b2* Intervention Group
  2. a Table input for linear regression b Table input for logistic regression