Table 2.

ORsa and 95% CIs for selected characteristics of incident cases of breast cancer comparing breast implant women to other cosmetic surgery women

CharacteristicsImplant cases (n = 409)Control cases (n = 444)OR95% CI
TNM stage at diagnosis
 I1271811.0
 II1581701.330.97–1.82
 III/IV55273.041.81–5.10
 Unknown69661.531.01–2.33
Tumour size, mm
 <212092511.0
 21–≤501011151.080.78–1.50
 >5018171.290.64–2.61
 Unknown81611.631.11–2.39
Nodal involvement
 No1752431.0
 Yes1541281.601.17–2.19
 Unknown80731.511.02–2.24
Histology
 Ductal2602881.0
 Lobular59700.890.59–1.35
 Nonmissing others76741.150.80–1.67
 Unknown14121.220.54–2.76
  • aOR adjusted for age at diagnosis, period of diagnosis, and province.