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. Author manuscript; available in PMC: 2020 Sep 1.
Published in final edited form as: Egypt J Occup Med. 2019 Sep;43(3):331–343. doi: 10.21608/ejom.2019.47402

Table (3):

Menstrual history of the exposed and control groups

Menstrual history Studied groups
 χ2 test P value
Exposed (n=100)
 Controls (n=50)
No. % No. %
Menarche:
 Yes 71 71.0 37 74.0 0.15 0.69
 No 29 29.0 13 26.0
Menarche age n=71
 n=37
 t-test = 1.64 0.11
12.97±1.88 12.35±1.82
Menstrual cycle:
 Regular 52 73.2 34 91.9 5.22 0.02*
 Irregular 19 26.8 3 8.1
Intermenstrual bleeding:
 Present 20 28.2 3 8.1 4.70 0.03*
 Absent 51 71.8 34 91.9
*

Significant

Table 3 shows that the exposed group had a significantly higher prevalence of irregular menstruation and intermenstrual bleeding compared to the control group.