MMR1 receipt in linked index and older children without MMR1 receipt between 12 months and 24 months of age
| Non-vaccinated groups | Index child (n=11 658) | % | Older child (n=11 324) | % |
| MMR1 receipt <12 months of age | 516 | 4.4 | 993 | 8.8 |
| MMR1 receipt between 24 months and 40 months of age | 2893 | 24.8 | 2642 | 23.3 |
| MMR1 receipt >40 months of age | 749 | 6.4 | 1689 | 14.9 |
| No record of MMR1 receipt in period of follow-up | 7500 | 64.3 | 6000 | 53.0 |
| Total | 11 658 | 100.0 | 11 324 | 100.0 |
MMR1, first measles, mumps and rubella dose.