Interhospital variation in surgical treatment of screen-detected breast cancer in the South of the Netherlands.

BACKGROUND

The effectiveness of the Dutch breast cancer screening programme depends on the quality of the full trajectory, from the first screening to the final treatment of a screen-detected breast cancer. Interhospital variation in breast cancer treatment has been explored by several studies, however, not specifically in a screen-detected breast cancer population. The current study compares the treatment strategies of women with screen-detected breast cancer between hospitals in the South of the Netherlands.

METHODS

A total of 1450 women with screen-detected breast cancer, who participated in the Dutch screening programme between January 2009 and July 2019, were included in this retrospective analysis of a prospectively obtained database. Breast cancer treatment (i.e. preoperative MRI, neoadjuvant systemic therapy and type and outcomes of surgery) was compared between hospitals using multivariate analysis.

RESULTS

Statistically significant interhospital variation was observed in the use of preoperative MRI (range 20.8-35.8 %, p < 0.001), neoadjuvant systemic therapy (range 4.0-13.3 %, p < 0.001) and breast conserving surgery (range 70.0-87.1 %, p < 0.001). These differences persisted after adjustment for case-mix. In patients with invasive breast cancer treated by breast conserving surgery, the mean volume of the resection specimen ranged from 381 to 541 ml between hospitals (p < 0.001). However, this was not accompanied by significant differences in the percentage of patients with positive resection margins (range 2.9-5.7 %, p = 0.34).

CONCLUSIONS

We observed significant interhospital variation in the management of women with screen-detected breast cancer. Quality assurance in screen-detected breast cancer may reduce these differences, but evolving breast cancer care and more personalised approaches should be accounted for.