Characteristics | Categories | Early LE/ at risk | Late LE/ at risk | Early-onset LE HR (95% CI)a | Late-onset LE HR (95% CI)a | Pfor interactionb |
---|---|---|---|---|---|---|
Breast cancer and treatment | Â | Â | Â | Â | Â | Â |
Age at diagnosis (years) | 35-44 | 18/123 | 25/105 | 1.00 | 1.00 | Â |
45-49 | 22/128 | 21/106 | 1.19 (0.63 - 2.24) | 0.83 (0.46 - 1.51) | Â | |
50-54 | 29/175 | 17/146 | 1.19 (0.65 - 2.17) | 0.51 (0.27 - 0.96) | Â | |
55-59 | 20/128 | 15/108 | 1.04 (0.54 - 2.00) | 0.59 (0.31 - 1.12) | Â | |
60-64 | 16/112 | 7/96 | 1.03 (0.50 - 2.10) | 0.31 (0.13 - 0.74) | 0.15 | |
Per unit of age | Â | Â | 1.00 (0.97 - 1.03) | 0.95 (0.92 - 0.98) | 0.02 | |
 |  |  | P trend = 0.91 | P trend = 0.002 |  | |
Surgery type | Partial/less than total mastectomy/surgery, NOS | 57/442 | 51/385 | 1.00 | 1.00 | Â |
Total mastectomy/modified radical mastectomy | 48/224 | 34/176 | 1.41 (0.95 - 2.09) | 1.32 (0.84 - 2.06) | 0.82 | |
Number of excised lymph nodes | 0 | 5/143 | 4/138 | 0.20 (0.08 - 0.51) | 0.13 (0.05 - 0.37) | Â |
1-9c | 19/162 | 13/143 | 0.57 (0.34 - 0.95) | 0.36 (0.20 - 0.65) | Â | |
10+ | 81/361 | 68/280 | 1.00 | 1.00 | 0.44 | |
Per lymph node | Â | Â | 1.04 (1.01 - 1.06) | 1.06 (1.03 - 1.09) | 0.20 | |
 |  |  | P trend = 0.003 | P trend <0.001 |  | |
Chemotherapy | No | 47/413 | 36/366 | 1.00 | 1.00 | Â |
Yes | 58/253 | 49/195 | 1.28 (0.86 - 1.91) | 1.77 (1.13 - 2.78) | 0.27 | |
Sociodemographic factors | Â | Â | Â | Â | Â | Â |
Race/ethnicity | Non-Hispanic white (NM, WW) | 50/371 | 38/321 | 1.00 | 1.00 | Â |
Black (LA) | 45/226 | 37/181 | 1.08 (0.70 - 1.65) | 1.26 (0.79 - 2.02) | Â | |
Hispanic white (NM) | 10/69 | 10/59 | 0.90 (0.45 - 1.78) | 1.24 (0.61 - 2.50) | 0.77 | |
Health-related factors | Â | Â | Â | Â | Â | Â |
Body mass index prior to diagnosis (kg/m2) | <25 | 37/306 | 33/269 | 1.00 | 1.00 | Â |
25-29.9 | 36/220 | 31/184 | 1.24 (0.78 - 1.98) | 1.25 (0.76 - 2.06) | Â | |
30+ | 32/140 | 21/108 | 1.64 (1.00 - 2.67) | 1.52 (0.87 - 2.66) | 0.97 | |
Per unit of BMI | Â | Â | 1.03 (1.00 - 1.07) | 1.04 (1.00 - 1.08) | 0.91 | |
 |  |  | P trend = 0.05 | P trend = 0.07 |  | |
Hypertension | No | 63/468 | 59/405 | 1.00 | 1.00 | Â |
Yes | 42/198 | 26/156 | 1.65 (1.08 - 2.54) | 1.30 (0.80 - 2.13) | 0.44 |