Table 2.
Seroprevalence against measles and measles IgG titer according to the number of previous MCV immunizations in each age group of the healthcare workers with a previous history of MCV immunization
| Age group | Number of vaccination |
Seroprevalence |
Measles IgG titer (AU/mL) |
||
|---|---|---|---|---|---|
| Number (%) | P value | Median (IQR) | P value | ||
| 20–25 yr | 1 (n = 232) | 170 (73.3) | .001 | 49.3 (15.5–110) | .004 |
| 2 (n = 104) | 90 (86.5) | 69.6 (28.9–143.5) | |||
| ≥3 (n = 23) | 23 (100.0) | 87.7 (45.1–189.0) | |||
| 26–29 yr | 1 (n = 182) | 168 (92.3) | .108 | 111.0 (48.2–300.0) | .293 |
| 2 (n = 74) | 73 (98.7) | 156.0 (64.9–300.0) | |||
| ≥3 (n = 8) | 8 (100.0) | 131.5 (48.8–294) | |||
| 30–34 yr | 1 (n = 146) | 139 (95.2) | .509 | 190.5 (72.1–300.0) | .268 |
| 2 (n = 24) | 24 (100.0) | 249.5 (105.1–300.0) | |||
| ≥3 (n = 3) | 3 (100.0) | 87.7 (41.2–227.0) | |||
| ≥35 yr | 1 (n = 72) | 71 (98.6) | .867 | 188.5 (81.4–300.0) | .451 |
| 2 (n = 2) | 2 (100.0) | 159.9 (47.8–272.0) | |||
IQR, inter-quartile range; MCV, measles-containing vaccine.