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Association between the tribe and sex with rugae pattern distribution.
| Ikwerre | Igbo | DF | Chi-square (χ 2) | Critical value | Chi (ρ) calculated P value | Inference | |||
|---|---|---|---|---|---|---|---|---|---|
| Male | Female | Male | Female | ||||||
| Rugae patterns | |||||||||
| Wavy | 119 | 117 | 161 | 188 | 15 | 36.74 | 24.996 | <0.001 | Significant association ∗ |
| Curvy | 151 | 99 | 87 | 82 | |||||
| Circular | 12 | 14 | 19 | 21 | |||||
| Straight | 33 | 34 | 19 | 15 | |||||
| Converging | 7 | 7 | 10 | 5 | |||||
| Diverging | 13 | 18 | 16 | 3 | |||||
The asterisks were used to demonstrate values with significant difference.
