Table 3.
Univariate Analysis of Categorical Treatment Factors
| Patient- or Treatment-Related Risk Factor | Mean RVC/WAC in Subgroup (%) | 95% CI | P |
|---|---|---|---|
| Surgical characteristics | |||
| Lumpectomy | 0.04 | −0.42 to 0.51 | —* |
| Mastectomy v lumpectomy | 0.26 | −0.28 to 0.79 | .5542 |
| No nodal surgery | −0.22 | −1.22 to 0.78 | — |
| SLNB v none | −0.35 | −0.73 to 0.04 | .8113 |
| ALND v none | 1.89 | 1.22 to 2.55 | <.001 |
| Radiation therapy | |||
| None | −0.00 | −0.43 to 0.43 | — |
| Breast/chest wall irradiation v none | −0.20 | −0.65 to 0.25 | .42341 |
| Breast/chest wall + RLNR v none | 1.29 | 0.65 to 1.88 | <.001 |
| BMI, lb/in2 | |||
| < 25 | −0.43 | −0.98 to 0.11 | — |
| ≥ 25 | 0.57 | 0.10 to 1.03 | .0064 |
Abbreviations: ALND, axillary lymph node dissection; BMI, body mass index; RLNR, regional lymph node irradiation; RVC, relative volume change; WAC, weight-adjusted volume change.
*
Indicates the specified variable or comparison was not analyzed.