Table 1.
Risk factors at baseline by case–control status within the Joanne Knight Breast Health Cohort.
| Cases (n = 294) | Controls (n = 657) | |||
|---|---|---|---|---|
| Risk factors | Mean (sd) | Median (Range) | Mean (sd) | Median (Range) |
| Age, y | 56.56 | 57.19 | 56.62 | 56.68 |
| (8.75) | (35.38–76.80) | (8.67) | (35.27–76.84) | |
| BMI (kg/m2) | 29.25 | 28.45 | 27.38 | 25.82 |
| (6.37) | (17.47–54.54) | (6.19) | (14.14–50.96) | |
| CC-VPD (%) | 6.31 | 5.59 | 6.19 | 5.22 |
| (3.46) | (1.82–19.16) | (3.89) | (1.66–24.46) | |
| MLO-VPD (%) | 6.78 | 6.41 | 6.52 | 5.77 |
| (2.81) | (2.01–18.53) | (3.19) | (1.91–22.54) | |
| Full-VPD (%) | 6.48 | 6.20 | 6.28 | 5.45 |
| (2.78) | (1.92–16.44) | (3.23) | (1.87–20.27) | |
| n (%) | ||||
| Family history of breast cancer | 92 (31.30%) | 156 (23.74%) | ||
| Race | ||||
| White | 232 (78.91%) | 533 (81.13%) | ||
| Black | 57 (19.39%) | 85 (12.93%) | ||
| Others | 5 (1.70%) | 39 (5.94%) | ||
| Biopsy confirmed benign breast disease | 88 (29.93%) | 179 (27.25%) | ||
| Parity (1+) | 232 (78.91%) | 544 (82.80%) | ||
| Postmenopausal | 199 (67.69%) | 452 (68.80%) | ||
| Diagnosis (years since entry mammogram) | ||||
| 0 ≤ 5 | 104 (35.4%) | |||
| 5 ≤ 10 | 176 (60.0%) | |||
| 10+ | 14 (1.02%) | — | ||
Note: Continuous covariates are reported with mean and standard deviation (sd); binary covariates are reported by the number of positive responses and their corresponding percentage.