Table 2. IR of any cancer before 18 years of age by mode of conception and country of birth in children born in Denmark, Finland, Norway, or Sweden (Denmark 1994–2014, Finland 1990–2014, Norway 1984–2015, and Sweden 1985–2015).
| ART | Spontaneous conception | All | |||||||
|---|---|---|---|---|---|---|---|---|---|
| No. of children with cancer | IR | No. of children with cancer | IR | No. of children with cancer | IR | ||||
| Per 1,000 children | Per 100,000 person-years | Per 1,000 children | Per 100,000 person-years | Per 1,000 children | Per 100,000 person-years | ||||
| All countries | 329 | 1.92 (329/171,774) |
19.29 (329/1,705,772) |
16,184 | 2.08 (16,184/7,772,474) |
16.68 (16 184/97,027,051) |
16,513 | 2.08 (16,513/7,944,248) |
16.72 (16,513/98,732,823) |
| Denmark | 108 | 2.36 (108/45,783) |
19.29 (108/549,372) |
2,840 | 2.17 (2,840/1,309,484) |
16.48 (2,840/17,231,434) |
2,948 | 2.18 (2,948/1,355,267) |
16.58 (2,948/17,780,806) |
| Finland | 49 | 1.65 (49/29,682) |
19.66 (49/296,659) |
3,140 | 2.14 (3,140/1,466,451) |
18.36 (3,140/17,106,671) |
3,189 | 2.13 (3,189/1,496,133) |
18.32 (3,189/17,403,330) |
| Norway | 63 | 1.85 (63/34,042) |
16.52 (63/306,537) |
3,841 | 2.10 (3,841/1,831,442) |
16.43 (3,841/23,373,870) |
3,904 | 2.09 (3,904/1,865,484) |
16.49 (3,904/23,680,407) |
| Sweden | 109 | 1.75 (109/62,267) |
20.55 (109/553,204 |
6,363 | 2.01 (6,363/3,165,097) |
16.18 (6,363/39,315,076) |
6,472 | 2.01 (6,472/3,227,364) |
16.23 (6,472/39,868,280) |
ART, assisted reproduction technology; IR, incidence rate.