Table 1.
Clinical characteristics of patients included in the study.
| Yale cohort | Swedish cohort | p-valueb | |
|---|---|---|---|
| Cases | 79a | 215 | – |
| Age | |||
| <50 | 21 (26.6%) | 49 (23%) | 0.6 |
| ≥50 | 58 (73.4%) | 166 (77%) | |
| Tumor size | |||
| ≤20 | 37 (46.8%) | 108 (50.2%) | 0.7 |
| >20 | 42 (53.2%) | 107 (49.8%) | |
| Continuous (mm) | 21 (15–30.5) | 21 (15–30) | 0.78 |
| Histologic grade | |||
| 2 | 17 (21.5%) | 22 (10.2%) | 0.02 |
| 3 | 61 (77.2%) | 190 (88.4%) | |
| NA | 1 (1.3%) | 3 (1.4%) | |
| Nodal status | |||
| Negative | 52 (65.8%) | 132 (61.4%) | 0.64 |
| Positive | 27 (34.2%) | 81 (37.7%) | |
| NA | – | 2 (0.9%) | |
| Chemotherapy | |||
| No | 12 (15.2%) | 57 (26.5%) | 0.46 |
| Yes | 46 (58.2%) | 158 (73.5%) | |
| NA | 21 (26.6%) | – | |
| Follow-up (years) | |||
| Follow-up time | 10.63 (6.3–16.4) | 3.94 (3.2–5.32) | – |
For dichotomous variables, number of samples and prevalence percentages are reported.
For continuous variables, median as well as first and third quartiles are reported.
a
EQC cohort: 92 slides from 79 patient cases.
b
Chi-squared test for categorical variables and Mann–Whitney test for continuous variables.