Table 2 Summary of patient characteristics
Supine (n= 23) | Prone (n= 23) | Comparison (two-tailed unpaired t-test) | ||
|---|---|---|---|---|
Mean Age (y) ± SD* | 65 ± 12 | 57 ± 9 | ||
Side: Left/Right | 13/10 | 13/10 | ||
Mean breast volume (cm3) ± SD | 841 ± 369 | 793 ± 462 | p = 0.70 (CI†= -200 to 296) | |
T Stage | Tis | 7 | 5 | |
T1 | 12 | 17 | ||
T2 | 4 | 1 | ||
N Stage | N0 | 21 | 21 | |
N1 | 2 | 2 | ||
Dissection Status: | No nodal biopsy | 5 | 6 | |
Sentinel node biopsy | 18 | 15 | ||
Completion axillary dissection | 0 | 2 | ||
Radiation Dose | 46 Gy in 23 fractions | 8 | 8 | |
42.5 Gy in 16 fractions | 9 | 9 | ||
50-50.4 Gy in 25-28 fractions | 6 | 6 | ||
Mean Axillary Volume | Level I (cm3) ± SD | 106 ± 38 | 98 ± 35 | p = 0.46 (CI = -30 to 14) |
Level II (cm3) ± SD | 21 ± 6 | 24 ± 7 | ||
Level III (cm3) ± SD | 9 ± 3 | 10 ± 5 | p = 0.13 (CI = -0.87 to 6.9) | |
p = 0.42 (CI = -3.5 to 1.5) |