title: Age at menarche, menstrual patterns, and menstrual characteristics in Jordanian adolescent girls.
abstract: OBJECTIVE
  To estimate the distribution of age at menarche and investigate menstrual patterns and symptoms among adolescent Jordanian girls.
  
  
  METHODS
  Menstrual status data were collected from 596 secondary-school students from the Amman area via a self-administered questionnaire. Descriptive statistics, cross-tabulation, and correlation coefficient calculations were used where appropriate, and probit analysis was applied to estimate mean ± SD age at menarche.
  
  
  RESULTS
  The students' mean age was 15.7 ± 1.5 years. Mean age at menarche was 13.1 ± 1.1 years for those who recalled it and 12.8 ± 1.4 years per the probit analysis. Menstruation duration was 4 to 7 days for 73.6% of the students, and it was more than 7 days for 2.2%. Mid-cycle pain was reported by 30.9% and dysmenorrhea by 37.6% of the students, 8% of whom needed to miss school 1 day per cycle. Body mass index was correlated with age at menarche (P=0.002).
  
  
  CONCLUSIONS
  The mean age at menarche was close to that reported in studies from Europe and the USA, but it was younger than the age reported in studies from Africa.
authors.affiliation: Department of Obstetrics and Gynecology, Faculty of Medicine, University of Jordan, Amman, Jordan. drmbata@hotmail.com
authors.forename: Majed S
authors.initials: MS
authors.lastname: Bata
mesh_terms: D000293:Adolescent; D015992:Body Mass Index; D002648:Child; D003430:Cross-Sectional Studies; D004412:Dysmenorrhea / Q000453:epidemiology*; D005260:Female; D006801:Humans; D007597:Jordan / Q000453:epidemiology; D008572:Menarche / Q000502:physiology*; D008597:Menstrual Cycle / Q000502:physiology*; D008598:Menstruation / Q000502:physiology*; D011795:Surveys and Questionnaires