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Table 2 Characteristics of sexually active participants according to age group and sex: mean (standard error).

From: Risk behaviors of 15–21 year olds in Mexico lead to a high prevalence of sexually transmitted infections: results of a survey in disadvantaged urban areas

 

15 to 18 years old

19 to 21 years old

 

Boys

Girls

Boys

Girls

Participation in paid sex (%)

2% (1%)

2% (1%)

1% (1%)

2% (1%)

N

313

598

381

887

Length of time sexually active (years)

1.88 (0.19)

1.65 (0.07)

3.02 (0.13)

3.57 (0.13)

N

306

589

380

886

Use of condom during most recent sexual activity (%)

36% (4%)

14% (2%)

34% (4%)

10% (2%)

N

313

598

381

887

Reported symptoms of an STI (%)

3% (2%)

1% (1%)

2% (1%)

4% (1%)

N

303

592

365

882

Positive for HSV 2 antibodies (%)

9% (3%)

4% (2%)

9% (4%)

19% (4%)

N

164

148

183

258

Positive for Chlamydia (%)

7% (3%)

10% (3%)

4% (2%)

9% (3%)

N

191

315

223

507