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Table 6 Multivariable logistic regression analysis of factors associated with polysubstance use in the past year among adolescent female sex workers (N = 310)

From: Sexual and reproductive health correlates of polysubstance use among female adolescents who sell sex in the southwest of China

Factors Polysubstance use
n/N (%) Crude OR
(95% CI)
p-value Adjusted ORa
(95% CI)
p-value
Education level
 Illiterate or primary school only 57/89(64) 1.0   1.0  
 Middle school (Grade 7–9) 152/166(92) 6.10(2.90–12.83)   6.81(3.09–15.01) < 0.001
 High school or higher (Grade 10–12) 50/55(91) 5.61(1.93–16.34) < 0.001 4.26(1.39–13.00) 0.011
Average monthly income from sex work
 ≤ 360 EUR (low level) 67/95(71) 1.0   1.0  
 > 360EUR (Middle to high level) 190/213(89) 3.45(1.83–6.52) < 0.001 2.94(1.40–6.14) 0.004
Had any intimate male partner with illicit drug use
 No 201/251(80) 1.0    
 Yes 58/59(98) 14.43(1.87–111.24) < 0.001   
Had sex without a condom while drunk (PM)
 No 169/213(79) 1.0    
 Yes 90/97(93) 3.35(1.43–7.84) 0.003   
Experienced sexual and gender-based violence (PY)
 No 147,192(77) 1.0   1.0  
 Yes 112/118(95) 5.71(2.29–14.27) < 0.001 5.74(2.19–15.05) < 0.001
Inconsistent condom use with any male partners (PM)
 No 65/86(76) 1.0    
 Yes 194/224(87) 2.09(1.11–3.93) 0.019   
Unmet need for modern contraception
 No 157/200(79) 1.0   1.0  
 Yes 102/110(93) 3.49(1.55–7.85) 0.001 3.47(1.44–8.40) 0.006
Received HIV testing (PY)
 Yes 109/140(78) 1.0    
 No 150/169(89) 2.25(1.20–4.22) 0.009   
Prior abortion
 No 134/174(77) 1.0   1.0  
 Yes 125/136(92) 3.39(1.64–7.01) < 0.001 2.95(1.31–6.64) 0.009
Any self-reported symptom of STIs (PY)
 No 75/105(72) 1.0    
 Yes 184/205(90) 3.50(1.85–6.63) < 0.001   
  1. In the final logistic regression model: Pseudo R2 = 0.29; P < 0.001; Akaike information criterion =210.80
  2. CI confidence interval, OR odds ratio in the bivariate logistic regression model
  3. aAdjusted odds ratio in the final logistic regression model