Diagnostic accuracy of history taking in determining immunisation status
| Age range | n | Number incomplete by history | Number incomplete by PCT* data | Sensitivity (%) | Specificity (%) |
|---|---|---|---|---|---|
| Overall (6–71 months†) | 670 | 19 | 46 | 41.3 (27.0 to 56.8) | 98.7 (97.5 to 99.4) |
| 6–12 months | 173 | 7 | 11 | 63.6 (30.8 to 89.1) | 96.3 (92.1 to 98.6) |
| 16–39 months | 334 | 7 | 20 | 35.0 (15.4 to 59.2) | 99.4 (97.7 to 99.9) |
| ≥44 months | 163 | 5 | 15 | 33.3 (11.8 to 61.6) | 100.0 (97.5 to 100.0) |
95% CIs are given in parentheses
*Including those detected on history.
†Excluding age subgroups 13–15 and 40–44 months reflecting those periods before our cut-off for being overdue with a set of immunisations.