Table 1.
Study sample of older breast cancer patients and matched controls
| All participants | Control | Breast cancer patients (Case) | p-Value1 | ||
|---|---|---|---|---|---|
| Number of participants | 741 (100%) | 370 (50%) | 371 (50%) | ||
| Age group2 | 60–64 | 262 (35.4) | 147 (39.7) | 115 (31.0) | .04 |
| 65–69 | 234 (31.6) | 112 (30.3) | 122 (32.9) | ||
| 70+ | 245 (33.1) | 111 (30.0) | 134 (36.1) | ||
| Age2 | Mean (SD) | 68.0 (6.5) | 67.9 (7.0) | 68.0 (6.0) | .72 |
| Range | (60–98) | (60–91) | (60–98) | ||
| Education (years)2 | Mean (SD) | 15.7 (2.4) | 15.7 (2.4) | 15.6 (2.4) | .59 |
| Range | (6–20) | (6–20) | (9–20) | ||
| Education2 | HS grad or Less | 102 (13.8) | 43 (11.6) | 59 (15.9) | .09 |
| Some college+ | 639 (86.2) | 327 (88.4) | 312 (84.1) | ||
| WRAT 4 Standardized Score | Mean (SD) | 111.3 (15.8) | 111.7 (16.1) | 111.0 (15.4) | .56 |
| Range | (64–145) | (74–145) | (64–145) | ||
| MMSE3 | Mean (SD) | 29.3 (1.1) | 29.4 (1.0) | 29.2 (1.2) | N/A |
| Range | (24–30) | (24–30) | (24–30) | ||
| Race (white vs. non-white) | Other | 144 (19.6) | 74 (20.1) | 70 (19.0) | .71 |
| White, non-Hispanic | 592 (80.4) | 294 (79.9) | 298 (81.0) | ||
| Hispanic or Latino | No | 684 (92.6) | 339 (92.1) | 345 (93.0) | .65 |
| Yes | 55 (7.4) | 29 (7.9) | 26 (7.0) | ||
| Surgery type | BCS | 197 (55.2) | |||
| Mastectomy | 156 (43.7) | ||||
| No surgery | 4 (1.1) | ||||
| Stage | 0 or 1 | 240 (67.4) | |||
| 2 or 3 | 116 (32.6) | ||||
| Treatment type | Chemo (±Hormonal) | 97 (28.0) | |||
| Hormonal only | 249 (72.0) | ||||
1p-Values are from chi-square or T-tests.
2Mean age and education are comparable. Age and education groups are presented since these were the strata used for age- and education-stratified reference values. Cases and controls vary somewhat when data are grouped into these categories.
3The MMSE was used only as an eligibility screening tool. Participants with scores <24 were not eligible for the study, hence the score range is truncated.