Annelotte van Bommel

65 Variation in immediate breast reconstruction Table 2. Baseline characteristics of 1,881 patients with ductal carcinoma in situ treated with a mastectomy by reconstruction status between 2011 and 2013 in the Netherlands. Immediate reconstruction No Yes n % n % Age Below 50 128 33% 265 67% 50 to 65 500 53% 452 48% 65 or above 466 87% 69 13% Multifocal No 942 60% 627 40% Yes 153 49% 159 51% Grade 1 93 54% 80 46% 2 354 57% 271 43% 3 596 60% 398 40% Unknown 52 58% 37 42% Percentages are rounded off, which in some cases leads to a total of above 100%. Invasive breast cancer Variation in use of immediate breast reconstruction On average, 16.8% (n=2536) of all patients with a mastectomy for invasive breast cancer underwent IBR. An increase in the mean use and range of IBR was seen over the years from 14.6% (range 0–54%) in 2011 to 19.3% (range 0–74%) in 2013. There was a decrease in the number of hospitals not performing IBR from 23 in 2011 to 11 in 2013. Unadjusted IBR rates for all hospitals combining 3 years together varied from 0% to 64% ( Figure 1 ). Immediate implant-based breast reconstructions were performedmost frequently (89%). Immediate autologous reconstructions and a combination of autologous and implant reconstructions were both used in less than 5% of the patients who underwent IBR, and in 1.9% the reconstruction was not otherwise specified. 4