Table 2.
Prevalence of persistent pain according to detection method, tumor and women’s characteristics
| Persistent paina | ||
|---|---|---|
| N (%) | P-value | |
| Women’s characteristics | ||
| Age (n = 1045) | 0.483 | |
| 50–54 (n = 305) | 36 (11.8) | |
| 55–59 (n = 281) | 37 (13.2) | |
| 60–64 (n = 275) | 29 (10.5) | |
| 65–70 (n = 184) | 16 (8.7) | |
| Charlson index (n = 1045) | <0.001 | |
| 0 (n = 769) | 65 (8.5) | |
| 1 (n = 180) | 32 (17.8) | |
| > =2 (n = 96) | 21 (21.9) | |
| Detection method (n = 1045) | ||
| Screen-detected tumors (n = 723) | 93 (12.9) | <0.05 |
| Interval tumors (n = 322) | 25 (7.8) | |
| Tumor characteristics | ||
| Tumor size (n = 932) | 0.907 | |
| < =10 mm (n = 237) | 14 (5.9) | |
| 11 to 20 mm (n = 387) | 28 (7.2) | |
| 21 to 50 mm (n = 265) | 19 (7.2) | |
| > 50 mm (n = 43) | 2 (4.7) | |
| Lymph node involvement (n = 1042) | 0.564 | |
| Negative (n = 713) | 78 (10.9) | |
| Positive (n = 329) | 40 (12.2) | |
| Number of positive nodes (n = 866) | 0.442 | |
| = <3 (n = 781) | 54 (6.9) | |
| 4–20 (n = 77) | 7 (9.1) | |
| > 20 (n = 8) | 1 (12.5) | |
| Histological type (n = 1038) | <0.05 | |
| Ductal (n = 763) | 94 (12.3) | |
| In situ (n = 93) | 2 (2.2) | |
| Lobular (n = 98) | 14 (14.3) | |
| Othter (n = 84) | 7 (8.3) | |
| Focality (n = 891) | 0.461 | |
| Unifocal (n = 741) | 56 (7.6) | |
| Multifocal and/or multicentric (n = 150) | 14 (9.3) | |
| Histological grade (n = 905) | 0.101 | |
| I (n = 228) | 19 (8.3) | |
| II (n = 348) | 46 (13.2) | |
| III (n = 270) | 25 (9.3) | |
| Not applicable (n = 59) | 3 (5.1) | |
| Tumor phenotype (n = 763) | 0.291 | |
| Luminal A (n = 404) | 41 (10.1) | |
| Luminal B (n = 207) | 12 (5.8) | |
| HER2 (n = 67) | 5 (7.5) | |
| Triple negative (n = 85) | 9 (10.6) | |
aPercentages were computed as follows: number of women with persistent pain divided by the total number of women for each category