Table 2.

Number (percentage) of fractions in which at least one BM barycenter shifted less than 1 mm, between 1 mm and 2 mm, and above 2 mm from the planned position for single, multiple, and all BM cohort.

BM Barycenter Shift	Single BM	Multiple BM	All BM
X < 1 mm	35 (73%)	111 (89%)	146 (84%)
1 mm < X < 2 mm	11 (23%)	13 (10%)	24 (14%)
X > 2 mm	2 (4%)	1 (1%)	3 (2%)