Table 2.
Characteristics of the breast cancer original cohort by treatment type before propensity matching.
| Characteristics | Women with breast cancer (N = 618) |
Breast cancer cases by treatment type | ||
|---|---|---|---|---|
| No radiation (N = 146; 23.62%) |
Radiation (N = 472; 76.38%) |
p-value | ||
| Mean utility | 0.695 (0.125) | 0.673 | 0.701 | .0164 |
| Age in years, N (%) | <.0001 | |||
| Mean age at diagnosis, mean (SD) | 73.72 (6.21) | 76.64 (7.09) | 72.53 (5.41) | <.0001 |
| Between 65 and 69 | 193 (31.23) | 29 (19.86) | 164 (34.75) | |
| Between 70 and 74 | 192 (31.07) | 35 (23.97) | 157 (33.26) | |
| Between 75 and 79 | 120 (19.42) | 30(20.55) | 90 (19.07) | |
| 80 and above | 113 (18.28) | 52 (35.62) | 61 (12.92) | |
| Race, N (%) | .3974 | |||
| White | 497 (79.94) | 120 (82.19) | 374 (79.24) | |
| Black | 59 (9.55) | 15 (10.27) | 44 (9.32) | |
| Others | 65 (10.52) | 11 (7.53) | 54 (11.44) | |
| Marital status at baseline, N (%) | .0034 | |||
| Married | 311 (49.32) | 58(39.75) | 253 (53.60) | |
| Unmarried | 307 (49.68) | 88 (60.27) | 307 (53.60) | |
| Education, N (%) | .327 | |||
| High school graduates or less (≤high school) | 343 (55.50) | 87 (59.59) | 256 (54.24) | |
| Some college degree or 2 years degree | 171 (27.67) | 40 (27.40) | 131 (27.75) | |
| College graduate or higher | 104 (16.83) | 19(13.01) | 85 (18.38) | |
| Area of residence | .2778 | |||
| Metro area | 579 (93.69) | 134 (91.78) | 445 (94.28) | |
| Non-metro area | 39 (6.31) | 12 (8.22) | 27 (5.72) | |
| Comorbidity, N (%) | .4250 | |||
| Healthy (0 comorbidities) | 62 (10.03) | 12 (8.22) | 50 (10.59) | |
| 1–2 comorbidities | 253 (40.94) | 66 (45.21) | 187 (39.62) | |
| >2 comorbidities | 303 (49.03) | 68 (46.58) | 235 (49.79) | |
| Grade, N (%) | .8780 | |||
| Well differentiated | 243 (39.32) | 60 (41.10) | 183 (38.77) | |
| Moderately differentiated | 304 (49.19) | 70 (47.95) | 234 (49.58) | |
| Poorly differentiated and undifferentiated | 71 (11.49) | 16(10.96) | 55 (11.65) | |
| Proxy, N (%) | .0184 | |||
| Yes | 85 (13.75) | 18(12.33) | 30 (6.36) | |
| No | 533 (86.25) | 128 (87.67) | 442 (93.64) | |
| Survey time point, N (%) | ||||
| Baseline | 492 (79.61) | 112 (76.71) | 380 (80.51) | .3197 |
| Follow-up | 126 (20.39) | 34 (23.29) | 92 (19.49) | |
| Survey disposition, N (%) | .4222 | |||
| Mailed survey | 533 (56.25) | 23 (15.75) | 62 (13.14) | |
| Telephone survey | 85 (13.75) | 123 (84.25) | 410 (86.86) | |
| Time from cancer diagnosis to survey, mean (SD), months | 27.31 (20.57) | 25.32 (19.89) | 27.93 (20.76) | .1812 |
| Time from cancer diagnosis to survey, N (%) | .6227 | |||
| 0–6 months | 89 (14.40) | 23 (15.75) | 66 (13.98) | |
| 7–12 months | 78 (12.62) | 20 (13.70) | 58 (12.29) | |
| 13–18 months | 88 (14.24) | 24 (16.44) | 64 (13.56) | |
| 19+ months | 368 (58.74) | 79 (54.11) | 284 (60.17) | |
| Time from diagnosis to treatment, Mean (SD), months | 1.81 (1.00) | 1.79 (1.40) | 1.81 (0.84) | .7799 |
| Time from diagnosis to treatment, N (%) | .8396 | |||
| <2 months | 503 (81.39) | 118(80.82) | 385 (81.57) | |
| ≥2 months | 115 (18.61) | 28 (19.18) | 87 (18.43) | |
| Year of diagnosis | .2458 | |||
| 2004 | 76 (12.30) | 13 (8.90) | 63 (13.35) | |
| 2005 | 80 (12.94) | 16(10.96) | 64 (13.56) | |
| 2006 | 91 (14.72) | 29 (19.86) | 62 (13.14) | |
| 2007 | 93 (15.05) | 21 (14.38) | 72 (15.25) | |
| 2008 | 84 (13.59) | 23 (15.75) | 61 (12.92) | |
| 2009 | 77 (12.46) | 22 (15.06) | 55 (11.65) | |
| 2010 | 66 (10.68) | 12 (8.22) | 54 (11.44) | |
| 2011 | 51 (8.25) | 10 (6.85) | 41 (8.69) | |
SD: standard deviation; N: number of observations; %: percent and column percent.