Table 1.
Demographic characteristics of the study participants (total vaccinated cohort).
| Sub-cohort 1 |
Sub-cohort 2 |
Sub-cohort 3 |
||||
|---|---|---|---|---|---|---|
| Characteristic | MMR-RIT (N = 802) |
MMR II (N = 298) |
MMR-RIT (N = 796) |
MMR II (N = 303) |
MMR-RIT (N = 1319) |
MMR II (N = 489) |
| Age* (years), mean (SD) | 4.1 (0.3) | 4.1 (0.3) | 4.4 (0.6) | 4.3 (0.6) | 4.4 (0.6) | 4.4 (0.6) |
| Females:males | 398:404 | 134:164 | 361:435 | 153:150 | 632:687 | 225:264 |
| Country, n (%) | ||||||
| South Korea | 0 (0.0) | 0 (0.0) | 158 (19.8) | 66 (21.8) | 91 (6.9) | 43 (8.8) |
| Taiwan | 0 (0.0) | 0 (0.0) | 226 (28.4) | 80 (26.4) | 492 (37.3) | 170 (34.8) |
| United States of America | 802 (100) | 298 (100) | 412 (51.8) | 157 (51.8) | 736 (55.8) | 276 (56.4) |
| Geographic ancestry, n (%) | ||||||
| African heritage/African American | 96 (12.0) | 39 (13.1) | 48 (6.0) | 19 (6.3) | 94 (7.1) | 32 (6.5) |
| American Indian or Alaskan native | 130 (16.2) | 38 (12.8) | 15 (1.9) | 3 (1.0) | 4 (0.3) | 0 (0.0) |
| Asian-East Asian heritage | 28 (3.5) | 6 (2.0) | 384 (48.2) | 146 (48.2) | 565 (42.8) | 209 (42.7) |
| Asian-South East Asian heritage | 49 (6.1) | 25 (8.4) | 11 (1.4) | 4 (1.3) | 16 (1.2) | 8 (1.6) |
| White-Caucasian/European heritage | 363 (45.3) | 135 (45.3) | 291 (36.6) | 117 (38.6) | 575 (43.6) | 218 (44.6) |
| Other | 136 (16.9) | 55 (18.4) | 47 (5.9) | 14 (4.6) | 65 (4.9) | 22 (4.5) |
N, number of participants; SD, standard deviation; n (%), number (percentage) of participants in the category.
*Age at study vaccination.