Table 3.

Cumulative incidence of lymphedema at 24 months post-operative stratified by type of radiotherapy and axillary surgery.

	Cumulative Incidence of Lymphedema (%, 95% Confidence Interval) (Number in subgroup)
Radiation Field(s)	Entire cohort (n=1501)	SLNB (n=928)	ALND (n=395)
No radiation	3.0 (1.6–5.6) (n=402)	0.00 (0.00–0.00) (n=313)	18.27 (9.7–32.9) (n=60)
B/CW only	3.1 (2.0–4.7) (n=790)	2.82 (1.7–4.8) (n=569)	7.33 (3.1–16.8) (n=73)
B/CW + SC	21.9 (16.0–29.5) (n=194)	7.14 (1.0–40.9) (n=25)	23.93 (17.5–32.2) (n=169)
B/CW + SC + PAB	21.1 (13.8–31.5) (n=115)	4.76 (0.7–29.3) (n=21)	24.89 (16.2–37.1) (n=94)

Abbreviations: SLNB = Sentinel Lymph Node Biopsy, ALND = Axillary Lymph Node Dissection, B/CW= PBI or Whole breast/chest wall, SC= Supraclavicular, PAB= Posterior Axillary Boost