Table 4.
‘Validation’ of CRCS immunisation flag.
| CRCS cohort | Never CPR nor CLA | Ever CPR | Ever CLA | |
|---|---|---|---|---|
| Total n (rows) | 56,715 | 22,330 | 13,740 | 20,650 |
| n Flag correct | 41,825 (73.7%) | 15,660 (70.1%) | 10,235 (74.5%) | 15,935 (77.2%) |
| n Flag incorrect | 14,890 (26.3%) | 6,670 (29.9%) | 3,505 (25.5%) | 4,715 (22.8%) |
| n marked up-to-date; child is not | 9,215 (16.2%) | 4,025 (18.0%) | 2,140 (15.6%) | 3,050 (14.8%) |
| n marked not up-to-date; child is | 5,675 (10.0%) | 2,645 (11.8%) | 1,365 (9.9%) | 1,665 (8.1%) |
| Where immunisation flag is not accurate, vaccines that are missing | ||||
| MMR1 | 1,415 (9.5%) | 715 (10.7%) | 325 (9.3%) | 375 (8.0%) |
| MMR2 | 1,865 (12.5%) | 1,190 (17.8%) | 355 (10.1%) | 325 (6.9%) |
| DTP 1 | 6,425 (43.1%) | 2,555 (38.3%) | 1,535 (43.8%) | 2,335 (49.5%) |
| DTP 2 | 4,800 (32.2%) | 1,990 (29.8%) | 1,145 (32.7%) | 1,665 (35.3%) |
| DTP 3 | 3,680 (24.7%) | 1,535 (23.0%) | 850 (24.3%) | 1,295 (27.5%) |
| DTP booster | 1,540 (10.3%) | 925 (13.9%) | 330 (9.4%) | 285 (6.0%) |
| Incorrect records per collection year | ||||
| 2016/17 | 3,255 (27.8%) | 1,630 (31.5%) | 550 (25.3%) | 1,075 (24.7%) |
| 2017/18 | 3,375 (28.9%) | 1,495 (33.3%) | 780 (28.6%) | 1,100 (24.7%) |
| 2018/19 | 3,395 (29.2%) | 1,465 (33.0%) | 835 (28.9%) | 1,100 (25.6%) |
| 2019/20 | 2,540 (22.3%) | 1,130 (26.5%) | 655 (21.3%) | 755 (18.6%) |
| 2020/21 | 2,325 (22.5%) | 955 (24.1%) | 685 (23.9%) | 685 (19.6%) |
| Total number of records per collection year | ||||
| 2016/17 | 11,710 (20.6%) | 5,175 (23.2%) | 2,175 (15.8%) | 4,360 (21.1%) |
| 2017/18 | 11,675 (20.6%) | 4,495 (20.1%) | 2,730 (19.9%) | 4,450 (21.5%) |
| 2018/19 | 11,630 (20.5%) | 4,445 (19.9%) | 2,890 (21.0%) | 4,295 (20.8%) |
| 2019/20 | 11,390 (20.1%) | 4,260 (19.1%) | 3,080 (22.4%) | 4,050 (19.6%) |
| 2020/21 | 10,315 (18.2%) | 3,955 (17.7%) | 2,865 (20.9%) | 3,500 (16.9%) |