Table 4.

Factors Associated With Measured Lymphedema

Factor	No Lymphedema* (n = 850)				Lymphedema† (n = 86)				P
	No.	%	Median	Range	No.	%	Median	Range
Age at follow-up, years			60	29-90			60	34-89	.27
Baseline weight, kg			65	39-147			77	43-134	< .0001
Current weight, kg			66	39-131			78	44-131	< .0001
Baseline BMI			24	15-54			29	20-49	< .0001
Current BMI			25	17-48			31	19-40	< .0001
Weight gain > 2 kg									.29
No	463	90			52	10
Yes	387	92			34	8
Surgery in dominant arm									.46
No	419	90			46	10
Yes	431	92			40	8
Radiation									.29
No	264	92			22	8
Yes	586	90			64	10
Infection since surgery									< .0001
No	822	92			75	8
Yes	28	72			11	28
Injury since surgery									.02
No	797	91			75	9
Yes	53	83			11	17
Breast conservation									< .0001
SLNB alone	415	95			23	5
SLNB/ALND	130	83			27	17
Mastectomy									.001
SLNB alone	154	95			8	5
SLNB/ALND	151	84			28	16

NOTE. L = (I_f/u − I_b) –(C_f/u − C_b), where I indicates ipsilateral upper-extremity circumference, C indicates contralateral upper-extremity circumference, f/u indicates follow-up, and b indicates baseline.

Abbreviations: BMI, body mass index; SLNB, sentinel lymph node biopsy; ALND, axillary lymph node dissection.

^*L ≤ 2 cm.

^†L > 2 cm.