Table 1.

Frequency distribution for selected characteristics of women diagnosed with breast cancer who received breast implants and other cosmetic surgeries, Canadian Breast Implant Cohort Study

CharacteristicsBreast implant women with breast cancer (n = 409)Other cosmetic surgery women with breast cancer (n = 444)
Time since surgery, years, N (%)a
 <529 (7.1)38 (8.6)
 5–<1053 (13.0)72 (16.2)
 10–<1596 (23.5)94 (21.2)
 15–<20101 (24.7)113 (25.5)
 20–<2580 (19.6)88 (19.8)
 ≥2550 (12.2)39 (8.8)
Mean duration of follow-up (SD), yearsb16.1 (7.2)15.5 (7.1)
Period of surgery, N (%)
 1974–197786 (21.0)67 (15.1)
 1978–1981123 (30.1)121 (27.3)
 1982–1985110 (26.9)145 (32.7)
 1986–198990 (22.0)111 (25.0)
Age at surgery, years, N (%)
 18–<35187 (45.7)167 (37.6)
 35–<45150 (36.7)162 (36.5)
 ≥4572 (17.6)115 (25.9)
Mean age at surgery (SD), years36.2 (8.4)38.1 (10.0)
Province of residence, N (%)
 Ontario101 (24.7)125 (28.2)
 Quebec308 (75.3)319 (71.9)
Age at breast cancer diagnosis, years, N (%)
 <4585 (20.8)81 (18.2)
 45–<5085 (20.8)78 (17.6)
 50–<60148 (36.2)167 (37.6)
 ≥6091 (22.2)118 (26.6)
Mean age at breast cancer diagnosis (SD), years52.3 (9.6)53.6 (9.9)
Length of cancer follow-up, years, N (%)
 <5141 (34.5)136 (30.6)
 5–<10123 (30.1)126 (28.4)
 10–<1589 (21.8)116 (26.1)
 15–<2028 (6.8)48 (10.8)
 ≥2028 (6.8)18 (4.1)
Period of diagnosis, N (%)
 <199052 (12.7)56 (12.6)
 1990–<1998132 (32.3)141 (31.8)
 ≥1998225 (55.0)247 (55.6)
  • aLength of interval between the date of index cosmetic surgery and breast cancer diagnosis.

  • bMean duration of follow-up between the date of index cosmetic surgery and breast cancer diagnosis.