Sample characteristics
| Pre-pandemic cohort (n=33 226) | Pandemic cohort (n=32 446) | All (n=65 672) | |||||||
| n | % | 95% CI | n | % | 95% CI | n | % | 95% CI | |
| Sex | |||||||||
| Male | 17 055 | 51.3 | 50.8 to 51.9 | 16 665 | 51.4 | 50.8 to 49.2 | 33 720 | 51.4 | 51.0 to 51.7 |
| Female | 16 169 | 48.7 | 48.1 to 49.2 | 15 781 | 48.6 | 48.1 to 49.2 | 31 950 | 48.6 | 48.3 to 49.0 |
| Other | 2 | 0 | 2 | ||||||
| CCG | |||||||||
| Barking & Dagenham | 3916 | 11.8 | 11.4 to 12.1 | 3819 | 11.8 | 11.4 to 12.1 | 7735 | 11.8 | 11.5 to 12.0 |
| City & Hackney | 4771 | 14.4 | 14.0 to 14.7 | 4631 | 14.3 | 13.9 to 14.7 | 9402 | 14.3 | 14.1 to 14.6 |
| Havering | 3684 | 11.1 | 10.8 to 11.4 | 3657 | 11.3 | 10.9 to 11.6 | 7341 | 11.2 | 10.9 to 11.4 |
| Newham | 6458 | 19.4 | 19.0 to 19.9 | 6210 | 19.1 | 18.7 to 19.6 | 12 668 | 19.3 | 19.0 to 19.6 |
| Redbridge | 4971 | 15.0 | 14.6 to 15.3 | 4793 | 14.8 | 14.4 to 15.2 | 9764 | 14.9 | 14.6 to 15.1 |
| Tower Hamlets | 4605 | 13.9 | 13.5 to 14.2 | 4598 | 14.2 | 13.8 to 14.6 | 9203 | 14.0 | 13.8 to 14.3 |
| Waltham Forest | 4821 | 14.5 | 14.1 to 14.9 | 4738 | 14.6 | 14.2 to 15.0 | 9559 | 14.6 | 14.3 to 14.8 |
| Ethnic background | |||||||||
| White | 9579 | 28.8 | 28.3 to 29.3 | 8938 | 27.6 | 27.1 to 28.0 | 18 517 | 28.2 | 27.9 to 28.5 |
| Mixed and other | 3813 | 11.5 | 11.1 to 11.8 | 3766 | 11.6 | 11.3 to 12.0 | 7579 | 11.5 | 11.3 to 11.8 |
| South Asian | 5881 | 17.7 | 17.3 to 18.1 | 5802 | 17.9 | 17.5 to 18.3 | 11 683 | 17.8 | 17.5 to 18.1 |
| Black | 2054 | 6.2 | 5.9 to 6.4 | 1992 | 6.1 | 5.9 to 6.4 | 4046 | 6.2 | 6.0 to 6.3 |
| Missing | 11 899 | 35.8 | 35.2 to 36.3 | 11 948 | 36.8 | 36.3 to 37.4 | 23 847 | 36.3 | 35.9 to 36.7 |
| IMD quintile | |||||||||
| Most deprived | 12 436 | 37.4 | 36.9 to 38.0 | 11 995 | 37.0 | 36.4 to 37.5 | 24 431 | 37.2 | 36.8 to 37.6 |
| 2 | 13 464 | 40.5 | 40.0 to 41.1 | 13 306 | 41.0 | 40.5 to 41.5 | 26 770 | 40.8 | 40.4 to 41.1 |
| 3 | 4533 | 13.6 | 13.3 to 14.0 | 4400 | 13.6 | 13.2 to 13.9 | 8933 | 13.6 | 13.3 to 13.9 |
| 4 | 1883 | 5.7 | 5.4 to 5.9 | 1956 | 6.0 | 5.8 to 6.3 | 3839 | 5.9 | 5.7 to 6.0 |
| Least deprived | 847 | 2.6 | 2.4 to 2.7 | 754 | 2.3 | 2.2 to 2.5 | 1601 | 2.4 | 2.3 to 2.6 |
| Missing | 63 | 0.2 | 0.1 to 0.2 | 35 | 0.1 | 0.1 to 0.2 | 98 | 0.2 | 0.1 to 0.2 |
| Timely MMR vaccination* | |||||||||
| Yes | 26 315 | 79.2 | 78.8 to 79.6 | 24 402 | 75.2 | 74.7 to 75.7 | 50 717 | 77.2 | 76.9 to 77.5 |
| No | 6911 | 20.8 | 20.4 to 21.2 | 8044 | 24.8 | 24.3 to 25.3 | 14 955 | 22.8 | 22.5 to 23.1 |
| Early | 180 | 0.5 | 0.5 to 0.6 | 120 | 0.4 | 0.3 to 0.4 | 300 | 0.5 | 0.4 to 0.5 |
| Late | 1678 | 5.1 | 4.8 to 5.3 | 932 | 2.9 | 2.7 to 3.1 | 2610 | 4.0 | 3.8 to 4.1 |
| Not yet received | 5053 | 15.2 | 14.8 to 15.6 | 6992 | 21.5 | 21.1 to 22.0 | 12 045 | 18.3 | 18.0 to 18.6 |
*Receipt of first MMR vaccination between 12 and 18 months of age. Not timely is further broken down into three groups: early (before age 12 months), late (after age 18 months) and not yet received.
CCG, Clinical Commissioning Group; IMD, Index of Multiple Deprivation; MMR, measles, mumps and rubella.