Table 1. The change in microhardness (VHN) after irradiation compared to the initial measurement (the observed variable is base - irradiation).
Tissue | Treatment | n | Mean | Std | Median | 1. quartile | 3. quartile | p-valuea |
---|---|---|---|---|---|---|---|---|
Enamel | 70 Gy | 20 | 11,4 | 7,0 | 11,4 | 6,7 | 16,2 | < 0,001 |
Dentin | 70 Gy | 20 | 11,0 | 7,5 | 10,8 | 5,5 | 15,4 | < 0,001 |
Enamel | 2x35 Gy | 20 | 11,2 | 6,4 | 11,1 | 6,7 | 14,0 | < 0,001 |
Dentin | 2x35 Gy | 20 | 12,2 | 7,3 | 10,8 | 7,8 | 15,9 | < 0,001 |
a P-value t-test for dependent samples.