Table 5.

DCISionRT continuous DS and categorical DS in relation to total and invasive breast event risk, by radiotherapy.

Stratified by radiation treatment
TotBEInvBE
Treatment groupNo. subjects/recurrencesHR (95% CI)*No. subjects/recurrencesHR (95% CI)*
Radiotherapy
 DS per 5 units377/391.47 (0.90–2.49)377/251.33 (0.73–2.59)
 Low risk group ≤ 3149/12Reference149/8Reference
 Elevated risk group > 3228/271.72 (0.86–3.41)228/171.73 (0.74–4.05)
No radiotherapy
 DS per 5 units78/142.70 (1.16–6.1)78/84.0 (1.33–12.60)
 Low risk group ≤ 341/4Reference41/2Reference
 Elevated risk group >337/103.04 (0.95–9.73)37/63.80 (0.76–0.18.92)
  • Note: Multivariable Cox proportional hazards analyses were completed for the full study period (up to 25 years of follow-up). The number of events within 10 years was 38 for TotBE and 21 for InvBE.

  • Abbreviations: DS, Decision score; InvBE, Invasive breast events; TotBE, total breast events.