Table 2: Statistical analysis comparing the frequency of breaks of different treatments for each group.

GroupsTreatments value of the Friedman test
SpontaneousBleomycin (6 μg/mL)Radiation (3 Gy)

Patientsaa, bb0.006
Parentsabb0.001
Control groupabb0.000

Treatments with at least one letter in common exhibit similar frequency of breaks ( ).