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Table 4 Comparison of invasive breast cancer treatment between organised and opportunistic mammography screening in women aged 50–69 years. Fribourg cancer registry 2006–2014

From: Comparison between opportunistic and organised breast cancer mammography screening in the Swiss canton of Fribourg

  Organised screening Number (%) Opportunistic screening Number (%) ORa CI95%a P-value
Breast Surgery
 Tumorectomy 279 (85.1) 142 (78.5) 1 [0.98; 2.50] 0.060
 Mastectomy 49 (14.9) 39 (21.5) 1.6
Lymph-adenectomy
 Yes 85 (25.8) 45 (24.6) 1 [0.70; 1.62] 0.771
 No 245 (74.2) 138 (75.4) 1.0
Radiation therapy
 Yes 295 (89.4) 146 (79.8) 1 [1.29; 3.53] 0.003
 No 35 (10.6) 37 (20.2) 2.1
Hormone therapy c
 Yes 278 (84.2) 147 (80.3) 1 [0.82; 2.09] 0.261
 No 52 (15.8) 36 (19.7) 1.3
Chemotherapy
 Yes 124 (37.6) 59 (32.2) 1 [0.86; 1.85] 0.227
 No 206 (62.4) 124 (67.8) 1.3
Trastuzumabc
 Yes 26 (7.9) 17 (9.3) 1 [0.44; 1.58] 0.581
 No 304 (92.1) 166 (90.7) 0.8
Time to treatment [days]
 Mean (SDa) 12.9 (8.0) 12.0 (8.2)    0.214b
  1. Calculated by logistic regression (reference: organised screening);
  2. aOR Odds ratio, CI Confidence interval, SD Standard deviation;
  3. bP-value calculated by Mann-Whitney-U-Test;
  4. cTreatment begun, but not necessarily completed