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Table 3 Prevalence of school and healthcare, sexual behavior, risk behaviors, and self-reported health variables and their association with condom non-use in Brazilian national adolescent sample

From: Associated factors and sex differences in condom non-use among adolescents: Brazilian National School Health Survey (PeNSE)

Variables Condom non-use Adjustedd analysis of condom non-use
Male Female Male Female
% RP (CI 95%) % RP (CI 95%) Adj RP (CI 95%) p Adj RP (CI 95%) p
School and health service
 In the last 12 months, have you had access to a health service or approached a health professional for health-related care?
  Yes 26.7 1 30.2 1 1 < 0.001 1 < 0.001
  No 34.0 1.28(1.22–1.33) 34.8 1.15(1.09–1.22) 1.22(1.17–1.27)   1.12(1.06–1.19)  
 At school, have you received pregnancy prevention counseling?  
  Yes 29.4 1 30.7 1 1 < 0.001 1 < 0.001
  No 33.7 1.15(1.08–1.21) 36.8 1.20(1.12–1.28) 1.14(1.08–1.20)   1.19(1.12–1.27)  
 At school, have you received counseling about AIDS or other STIs?       
  Yes 29.3 1 31.3 1 1 < 0.001 1 < 0.001
  No 34.8 1.19(1.11–1.27) 37 1.18(1.09–1.28) 1.17(1.09–1.25)   1.17(1.08–1.27)  
Sexual behavior
 Age of first sexual intercourse
   ≥ 15 years 22.2 1 26.2 1 1 < 0.001 1 < 0.001
  13 and 14 years 24.1 1.09(1.00–1.18) 31.8 1.21(1.13–1.31) 1.05(0.96–1.14)   1.39(1.28–1.51)  
   ≤ 12 years 43.1 1.94(1.80–2.10) 44.7 1.70(1.56–1.87) 1.78(1.64–1.93)   1.92(1.74–2.11)  
 Number of sexual partners
  1 34.6 1 27.3 1 1 < 0.001 1 < 0.001
  2 to 3 30.2 0.87(0.83–0.93) 33.5 1.23(1.15–1.31) 0.88(0.83–0.93)   1.21(1.13–1.29)  
  4 or more 27.1 0.79(0.74–0.83) 43.5 1.59(1.49–1.71) 0.84(0.80–0.89)   1.55(1.45–1.66)  
 Additional contraception method use
  No 40.1 1 39.8 1 1 < 0.001 1 < 0.001
  Yes, hormonal contraception methoda 17.3 0.43(0.4–0.47) 25.4 0.64(0.60–0.68) 0.44(0.41–0.47)   0.63(0.59–0.68)  
  Yes, non-hormonal contraception methodb 16.7 0.42(0.38–0.46) 22 0.55(0.49–0.62) 0.42(0.38–0.46)   0.55(0.49–0.63)  
Risk behaviors
 Smoked at least once
  No 26.1 1 25.8 1 1 < 0.001 1 < 0.001
  Yes 36.7 1.41(1.34–1.47) 40 1.55(1.46–1.64) 1.39(1.33–1.45)   1.49(1.41–1.58)  
 During the last 30 days, how many days did you smoke?c
  None 36.8 1 40.1 1 1 0.047 1 < 0.001
  1 to 2 days 34.2 0.93(0.85–1.02) 36.7 0.92(0.83–1.01) 0.96(0.88–1.05)   0.92(0.83–1.01)  
  3 to 9 days 39.6 1.07(0.96–1.20) 37 0.92(0.80–1.06) 1.10(0.98–1.23)   0.93(0.82–1.07)  
  10 or more days 38.3 1.04(0.93–1.16) 48.9 1.21(1.09–1.37) 1.11(1.02–1.24)   1.24(1.11–1.38)  
 Drank alcohol at least once
  No 24.7 1 22 1 1 < 0.001 1 < 0.001
  Yes 32 1.30(1.22–1.37) 34 1.55(1.41–1.70) 1.28(1.21–1.36)   1.51(1.37–1.65)  
 During the last 30 days, how many days did you drink?c
  None 32.9 1 32.2 1 1 0.001 1 < 0.001
  1 to 2 days 29.3 0.89(0.84–0.95) 32.6 1.01(0.94–1.09) 0.92(0.86–0.98)   1.03(0.96–1.10)  
  3 to 9 days 31.4 0.95(0.89–1.03) 36.9 1.15(1.06–1.24) 1.00(0.93–1.07)   1.16(1.08–1.26)  
  10 or more days 34.8 1.06(0.97–1.16) 40.7 1.26(1.15–1.39) 1.14(1.05–1.25)   1.30(1.18–1.42)  
 In your life, how many times did you drink until you got drunk?c
  None 30.2 1 28 1 1 < 0.001 1 < 0.001
  1 to 2 days 32.9 1.09(1.03–1.15) 36.2 1.29(1.20–1.38) 1.10(1.04–1.17)   1.28(1.19–1.37)  
  3 to 9 days 33.4 1.11(1.03–1.19) 40.1 1.43(1.31–1.56) 1.15(1.07–1.24)   1.43(1.31–1.55)  
  10 or more days 36.0 1.19(1.10–1.30) 45.6 1.63(1.47–1.80) 1.28(1.17–1.39)   1.63(1.48–1.81)  
 Used drugs at least once (marijuana, cocaine, crack)
  No 28.7 1 28.7 1 1 < 0.001 1 < 0.001
  Yes 35.6 1.24(1.18–1.31) 42.3 1.47(1.39–1.56) 1.25(1.19–1.32)   1.45(1.37–1.54)  
 During the last 30 days, how many days did you use drugs?c
  None 35.7 1 41.9 1 1 0.056 1 0.077
  1 to 2 days 32.6 0.91(0.81–1.03) 40.8 0.97(0.87–1.09) 0.92(0.82–1.04)   0.97(0.86–1.08)  
  3 to 9 days 35.7 1.00(0.87–1.14) 41.4 0.99(0.86–1.14) 1.02(0.89–1.17)   1.01(0.88–1.16)  
  10 or more days 40.3 1.13(0.99–1.28) 49.8 1.19(1.03–1.37) 1.13(0.99–1.28)   1.18(0.99–1.35)  
Self-reported general health
 Feel alone
  Never 26.6 1 27.8 1 1 < 0.001 1 < 0.001
  Rarely 29.2 1.10(1.03–1.17) 32 1.15(1.04–1.28) 1.06(0.99–1.13)   1.12(1.02–1.24)  
  Sometimes 32.3 1.21(1.14–1.29) 31.8 1.15(1.05–1.25) 1.18(1.12–1.25)   1.12(1.02–1.21)  
  Most of the time or always 40.1 1.51(1.41–1.61) 34.9 1.26(1.15–1.37) 1.43(1.33–1.52)   1.21(1.11–1.33)  
 Body weight perception
  Very thin 35.4 1.26(1.14–1.39) 33.9 1.11(0.98–1.25) 1.26(1.15–1.37) < 0.001 1.11(0.99–1.25) 0.017
  Thin 32.8 1.17(1.10–1.24) 33.9 1.11(1.03–1.20) 1.14(1.08–1.20)   1.09(1.01–1.17)  
  Normal 28.1 1 30.4 1 1   1  
  Fat 32.2 1.15(1.07–1.23) 33.5 1.10(1.02–1.18) 1.12(1.04–1.20)   1.08(1.01–1.16)  
  Very fat 45 1.60(1.38–1.85) 36.7 1.20(1.04–1.39) 1.58(1.38–1.82)   1.20(1.0–1.38)  
 Feelings about the body
  Very satisfied 26.3 1 27.6 1 1 < 0.001 1 < 0.001
  Satisfied 30.1 1.15(1.09–1.21) 31.8 1.15(1.09–1.24) 1. 09(1.04–1.15)   1.14(1.05–1.22)  
  Indifferent 36.5 1.39(1.29–1.50) 34.2 1.24(1.12–1.38) 1.33(1.23–1.44)   1.21(1.09–1.35)  
  Unsatisfied or very unsatisfied 37.8 1.44(1.34–1.55) 36.6 1.33(1.22–1.44) 1.36(1.26–1.45)   1.29(1.19–1.39)  
 Self-reported state of health
  Very good 26.1 1 25.5 1 1 < 0.001 1 < 0.001
  Good 31.3 1.20(1.14–1.27) 33.8 1.32(1.22–1.44) 1.15(1.09–1.22)   1.28(1.18–1.39)  
  Regular 36.7 1.41(1.32–1.50) 34.6 1.35(1.25–1.47) 1.36(1.28–1.44)   1.31(1.21–1.41)  
  Poor or very poor 34.3 1.32(1.22–1.42) 36.5 1.43(1.30–1.57) 1.31(1.21–1.41)   1.39(1.26–1.53)  
  1. PeNSE Pesquisa Nacional de Saúde do Escolar (National School Health Survey); AIDS Acquired Immunodeficiency Syndrome; STI Sexually Transmitted Infections
  2. Explanatory variables were adjusted by confounding variables (socioeconomic variables) in a Poisson regression model-based analysis with robust variance. The effect measure was the prevalence ratio (PR) with its respective 95% confidence intervals (CIs) (α = 0.05). Bolded p-values denote statistical significance (p < 0.05).
  3. aHormonal contraception method: contraceptive pill, injection or patch, hormonal intrauterine device
  4. bNon-hormonal contraception method: intrauterine device, diaphragm, or other
  5. cOnly asked of those to whom it was relevant
  6. dVariables adjusted by Municipality, School, Age, Mother’s Level of Education, and Other contraceptive method (except condom)