Abstract
Background: Menstruation in the teenage age has assumed variable trends which is been influenced by several variables. This study is aimed at determining the pattern and trend of menstruation among teens attending secondary school in south east Nigeria and associated factors.
Methods: Menstruation patterns were investigated using a stratified random sampling method of teens from junior secondary schools in Enugu, south east Nigeria. A self-administered questionnaire was developed and data analyzed using SPSS version 19.
Results: A total of 897 female teenagers aged 9–18 years completed the questionnaire with a mean age of 13.9±1.9 years. The mean age (SD) at onset of menarche was 12.5±1.2 years. Teenage girls with higher BMI achieved menarche earlier at age 8 and 9 when compared with their counterparts with lower BMI and this is statistically significant. F=7.60, df=8, p<0.001. Teens with a 14-day cycle had a higher BMI when compared with teens with longer cycle but this is not statistically significant. F=1.05, df=4, p=0.381. There is a statistical significance difference between teens duration of menstrual flow and BMI. Those with higher BMI had longer duration(4–5 days) compared with those with lower BMI. F=3.329, df=4, p=0.01
Conclusions: This study revealed that the mean age at onset of menarche was 12.5±1.2 years showing a continuing decreasing trend. Teens with higher BMI attain menarche earlier and had longer days of periods when compared with their counterpart with lower BMI.
Author contributions: JMC, ARC, PMC, AU, VO, EA contributed to the conception, writing and proof reading of this manuscript. JMC and ARN contributed to writing of the manuscript. All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: None declared.
Employment or leadership: None declared.
Honorarium: None declared.
Competing interests: The funding organization(s) played no role in the study design; in the collection, analysis, and interpretation of data; in the writing of the report; or in the decision to submit the report for publication.
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