Table 1: Tumor characteristics.

Tumor characteristicTreatment group value
Group 1
(Apical height)
Group 2
(5 mm)
Total(Pearson’s chi-squared test)

Largest diameter of tumor (mm)
  Mean10.710.810.7 0.9
 Standard deviation2.83.12.9
Ultrasound height (mm)
  Mean3.33.23.3 0.9
 Standard deviation0.760.820.78
Location
 Posterior to
 equator
271643
 Anterior to equator1513280.4
 Both anterior and
 posterior
6814
Mushroom shaped
 Yes12416 0.4
 No393271