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Table 5 Comparative analysis of the mean age at menarche stratified by some variables

From: Knowledge of peri-menarcheal changes and a comparative analysis of the age at menarche among young adolescent school girls in urban and rural Cameroon

Variables

Modality

Mean age (year)

SD (standard deviation)

p-value

State of parents

Both alive

12.72

1.36

0.0461*,μ

At least one dead

12.95

1.32

Age above 14 year

Yes

13.02

1.39

0.000£,μ

No

12.25

1.03

Occupation of male parents

Skilled

12.67

1.27

0.005£,μ

Unskilled

12.90

1.41

Male Parents’ level of education

Not schooled and primary

12.89

1.34

0.100*

Above primary

12.73

1.33

Watching of Television

Never or only on week-ends

12.86

1.34

0.030*,μ

Everyday

12.69

1.32

BMI

Greater than 25 kg/m2

12.48

1.14

0.003£,μ

Less than 25 kg/m2

12.94

1.46

Religion

Christian

12.76

1.33

0.711*

Muslim/others

12.83

1.41

Urban/Rural resident

Urban

12.48

1.12

0.000£,μ

Rural

13.03

1.46

  1. £ Mann-Whitney/Wilcoxon Two-Sample Test p-value, * t-Test p-value, μ Statistically significant p-value < 0.05