Number of children with CP, multiples with CP, live births, multiple live births and number of cohort birth years for which data were available by register
| Register | N CP | Multiples CP | Live births | Multiple live births | Cohort birth years |
| Cork & Kerry, Ireland | 127 | 26 | 82 019 | 2204 | 9 |
| Gothenburg, Sweden | 835 | 98 | 421 050 | 12 229 | 19 |
| NW England, UK | 1153 | 106 | 534 316 | 14 167 | 16 |
| Oxford, UK | 737 | 84 | 483 734 | 15 014 | 14 |
| Denmark | 2106 | 263 | 1 029 591 | 39 613 | 18 |
| Viterbo, Italy | 142 | 14 | 37 886 | 751 | 18 |
| Norway | 1257 | 158 | 638 888 | 22 556 | 10 |
| Madrid, Spain | 79 | 15 | 54 851 | 1180 | 9 |
| Slovenia | 309 | 45 | 142 311 | 4651 | 8 |
| Portugal | 1440 | 150 | 871 439 | 22 583 | 8 |
| Latvia | 93 | 4 | 61 210 | 1418 | 9 |
| Hungary | 138 | 15 | 88 830 | 2883 | 9 |
CP, cerebral palsy.