Table 2. Correlation coefficients between research variables.
| 1 | 2 | 3 | 4 | 5 | |
| 1. Long axis length | 1 | ||||
| 2. Short axis length | 0.660 | 1 | |||
| 3. Thickness | 0.232 | 0.271 | 1 | ||
| 4. Depth | 0.178 | 0.088 | 0.248 | 1 | |
| 5. Hardness | 0.104 | 0.040 | 0.118 | −0.138 | 1 |
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