Clinical Study
A Comparative Study of Palatal Rugae Patterns among Igbo and Ikwerre Ethnic Groups of Nigeria: A University of Port Harcourt Study
Table 7
-test for difference in mean length of the primary rugae of the two ethnic groups.
| | Variable | Sample size () | Min | Max | Mean | SD | (calculated value) | (critical value) | value (calculated) | Inference |
| | Male Igbo >5 MM | 273 | 5.01 | 18.48 | 10.18 | 2.99 | 2.535 | 1.96 | 0.011 | Significant
*
| | Male Ikwerre >5 MM | 312 | 5.01 | 19.12 | 9.54 | 3.11 |
| | Female Igbo >5 MM | 264 | 5.01 | 18.5 | 10.03 | 3.18 | 1.406 | 1.96 | 0.16 | Not significant | | Female Ikwerre >5 MM | 285 | 5.01 | 17.21 | 9.66 | 2.96 |
|
|
The asterisks were used to demonstrate values with significant difference.
|
