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Table 3 Multivariable Extended Cox analysis of correlates of incident pregnancy among 204 Female and Entertainment Sex workers (799 observations), working in Phnom Penh, Cambodia enrolled in the YWHS-II study

From: High pregnancy incidence and low contraceptive use among a prospective cohort of female entertainment and sex workers in Phnom Penh, Cambodia

Characteristic Unadjusted Hazard Ratio (HR) Adjusted Hazard Ratio (AHR) MODEL 1 (FULL) Adjusted Hazard Ratio (AHR) MODEL 2 (sig p < 0.05)
Socio-demographics, biological individual factors
Age (years)
 16–18 1.00 (0.02–4.31) 1.59 (0.36–7.11) 1.37 (0.31–6.00)
 19–24 2.28 (1.22–4.27)* 3.30 (1.57–6.96) 2.56 (1.35–4.87)
 25–29 years REF REF REF
Income, last month ($USD)
  ≤ 150 2.29 (0.96–5.44)* 2.63 (1.02–6.77)
  > 150 REF REF
Education
 No schooling 1.38 (0.40–4.70) 1.39 (0.38–5.12)
 1–6 years 2.43 (0.86–6.89)* 1.87 (0.64–5.50)
 7+ years REF REF
Marital status
 Legally married 2.09 (0.49–8.99) 1.42 (0.28–7.07) 1.76 (0.40–7.66)
 Living together, not legally married 2.05 (1.09–3.84) 1.92 (0.23–15.9) 1.95 (1.03–4.71)
 Single, widowed, divorced or separated REF REF REF
Number of previous children 0.76 (0.56–1.03) 0.67 (0.38–1.17)
HIV positive 0.36 (0.11–1.16) 0.47 (0.13–1.63)
Days drank alcohol, last month 0.77 (0.51–1.18)
ATS use, last 3 months (self-report) 0.79 (0.35–1.78)
Condom self-efficacy‡ 0.92 (0.85–0.99) 0.89 (0.81–0.98) 0.92 (0.84–0.99)
Hormonal contraceptive use, last 3 months‡ 5.63 (0.78–41.0)* 0.17 (0.02–1.27)
Interpersonal factors
 Condom use, last sex (yes) 0.45(0.23–0.88) 0.57 (0.28–1.13)
 Condom use, last client (yes) 0.74 (0.09–5.81)
 Condom use, non-paying partner (yes) 0.53 (0.13–2.26)
 Number of sexual partners, last month 1.11 (0.51–2.41)
 Client physical or sexual violence, last year 1.88 (0.73–4.85)
 Intimate partner physical or sexual violence, last year 0.96 (0.23–3.98)
Sex work factors
 Entertainment venue-based sex work, last month 0.67 (0.34–1.31)
 Non- entertainment venue-based sex work, last month REF
 Had a manager 0.65 (0.35–1.21)
  1. *p < 0.10
  2. p < 0.05
  3. ‡ at baseline
  4. All variables (except condom self-efficacy) are time-updated to refer to occurrences in the past three months