title: Premarital sexual intercourse among adolescents in Malaysia: a cross-sectional Malaysian school survey.
abstract: BACKGROUND
  Sexual intercourse among Malaysian adolescents is a major concern, especially with the worry of HIV/AIDS. This study was done to determine the prevalence of sexual intercourse among secondary school students aged 12 to 19 years in Negeri Sembilan, Malaysia.
  
  
  METHODS
  This is a cross-sectional school survey conducted on 4,500 adolescent students based on a structured questionnaire. Data were collected using the self-administered questionnaire (translated version of the Youth Risk Behaviour Surveillance in Bahasa Malaysia).
  
  
  RESULTS
  The study showed that 5.4 percent of the total sample were reported to have had sexual intercourse. The proportion among male students who had had sex was higher (8.3 percent) compared with female students (2.9 percent). The mean age at first sexual intercourse was 15 years. One percent of students reported that they had been pregnant or had made someone else pregnant. Adolescent sexual intercourse was significantly associated with (1) socio-demographical factors (age, gender); (2) environmental factors (staying with parents); and (3) substance use (alcohol use, cigarette smoking, drug use), even after adjustment for demographical factors. The survey showed that 20.8 percent of respondents had taken alcohol, 14.0 percent had smoked cigarettes, 2.5 percent had tried marijuana, 1.2 percent had tried ecstasy pills, 2.6 percent had tried glue sniffing, 0.7 percent had tried heroin, and 0.7 percent had intravenous drugs.
  
  
  CONCLUSIONS
  Prevalence of sexual intercourse among Malaysian adolescents was relatively low compared to developed countries. However, certain groups of adolescents tend to be at higher risk of engaging in sexual intercourse. This problem should be addressed early by targeting these groups of high-risk adolescents.
authors.affiliation: Department of Community Medicine, International Medical University, Plaza Komanwel, Bukit Jalil, Kuala Lumpur 57000, Malaysia. laikah_lee@imu.edu.my
authors.forename: L K
authors.initials: LK
authors.lastname: Lee
authors.forename: P C Y
authors.initials: PC
authors.lastname: Chen
authors.forename: K K
authors.initials: KK
authors.lastname: Lee
authors.forename: J
authors.initials: J
authors.lastname: Kaur
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior / Q000208:ethnology; D000328:Adult; D040343:Behavioral Risk Factor Surveillance System; D002648:Child; D003075:Coitus; D003430:Cross-Sectional Studies; D005260:Female; D015658:HIV Infections / Q000209:etiology; D006801:Humans; D008296:Malaysia / Q000453:epidemiology; D008297:Male; D015995:Prevalence; D018570:Risk Assessment; D012309:Risk-Taking; D012574:Schools; D012650:Self Disclosure; D012749:Sexually Transmitted Diseases / Q000209:etiology; D013334:Students / Q000523:psychology / Q000706:statistics & numerical data*; D011795:Surveys and Questionnaires; D047568:Unsafe Sex / Q000208:ethnology / Q000523:psychology / Q000706:statistics & numerical data*