highly significantp ≤ 0.001
The levels of significance were defined as follows: p ≤ 0.05 indicates a statistically significant difference (5% probability of the result occurring by chance), ** p ≤ 0.01 indicates a highly significant difference (1% probability of error), and *** p ≤ 0.001 indicates an extremely significant difference (0.1% probability of error.