Table 1: Frequency of chromosomal breaks observed in the different groups and treatments.

Frequency of chromosomal breaks
SpontaneousBleomycin (6 μg/mL)Radiation (3 Gy)

Patients
 Frequency (min × max)0.00–1.300.43–5.650.47–7.32
frequencies/cell0.181.632.10
cells (min × max) 30 × 5030 × 5030 × 50
Parents
 Frequency (min × max)0.00–0.130.00–1.270.23–0.93
frequencies/cell0.020.560.52
cells (min × max)30 × 505 × 5021 × 50
Control group
 Frequency (min × max)0.00–0.030.00–0.900.10–0.93
frequencies/cell0.010.470.56
cells (min × max)304 × 3013 × 30

: average frequency of chromosomal breaks per cell.