Table 1.
Patient characteristics of Danish breast cancer patients treated with Mepitel Film during radiotherapy (n = 79). The P-value measures whether the distributions for breast and chest wall are equal.
| Combined, n = 79 (%) | Breast, n = 63 (%) | Chest wall, n = 16 (%) | P-value | |
|---|---|---|---|---|
| Randomization | ||||
| Medial | 38 (48.1) | 32 (50.8) | 6 (37.5) | 0.342a |
| Lateral | 41 (51.9) | 31 (49.2) | 10 (62.5) | |
| Age, mean (range 31–82) | 61.9 | 61.8 | 62.0 | 0.957b |
| BMI, mean | 26.5 | 26.1 | 28.0 | 0.226b |
| Smoking status | ||||
| Never | 35 (44.3) | 28 (44.5) | 7 (43.7) | |
| Former | 28 (35.4) | 22 (34.9) | 6 (37.5) | 0.976a |
| Current | 16 (20.3) | 13 (20.6) | 3 (18.8) | |
| Comorbidity | ||||
| Yes | 26 (32.9) | 20 (31.8) | 6 (37.5) | 0.889a |
| No | 53 (67.1) | 43 (68.2) | 10 (62.5) | |
| Treatment types (1 missing) | ||||
| Sentinel node neg. or in situ | 49 | 49 | 0 | |
| Mastectomy <10 LN removed | 3 | 0 | 3 | |
| Mastectomy ≥10 LN removed | 13 | 0 | 13 | |
| Lumpectomy <10 LN removed | 4 | 4 | 0 | |
| Lumpectomy ≥10 LN removed | 9 | 9 | 0 | |
| Radiation therapy | ||||
| 40 Gy/15 fx | 59 (74.7) | 54 (85.7) | 5 (31.2) | <0.001a |
| 50 Gy/25 fx | 20 (25.3) | 9 (14.3) | 11 (68.8) | |
| Boost, yes | 6 (7.6) | 6 (9.7) | 0 | |
| 5,75 Gy (simultaneous integrated) | 1 | 1 | 0 | 0.195a |
| 10 Gy | 4 | 4 | 0 | |
| 16 Gy | 1 | 1 | 0 | |
| Bolus 5 mm | ||||
| Yes | 16 (20.3) | 0 (0) | 16 (100) | <0.001a |
| No | 63 (79.7) | 63 (100) | 0 (0) | |
| Volume of irradiated breast tissue (cm3), median (range) | 534 (0–1.746) | 636 (131–1746) | 226.5 (110–990) | <0.001c |
| Chemotherapy | ||||
| Yes | 42 (53) | 28 (44) | 14 (88) | 0.002a |
| No | 37 (47) | 35 (56) | 2 (12) | |
Differences in the distribution of the variables were compared by:
a
Pearson x2 test.
b
Unpaired t-test.
c
Wilcoxon rank-sum test.