highly significantp < 0.000
Comparison with an established method (TWI) Kendall's test for nonparametric correlation between the quantitative measurements (RFSA%/MISA) and the ordinal macrowear score (based on TWI) found a highly significant ( p < 0.000) moderate to strong relationship for both variables (RFSA% and MISA) in both deciduous molars (RFSA%: 0.616 strong/MISA: 0.709 strong) and permanent molars (RFSA%: 0.459 moderate/MISA: 0.563 strong).