Table 2.
Clinical Characteristics of Laboratory-Confirmed Measles, Matched Case-Control Study—Ulaanbaatar, Mongolia, March 1–September 25, 2015
| Case characteristic | All Cases (N = 124) | Unvaccinateda Cases (N = 95) | Vaccinated Cases (N = 29) |
|---|---|---|---|
|
|
|||
| Symptom | n (%) or Median (IQR) | ||
|
| |||
| Fever | 122 (98%) | 94 (99%) | 28 (97%) |
| Rash | 120 (97%) | 92 (97%) | 28 (97%) |
| Cough | 87 (70%) | 69 (73%) | 18 (62%) |
| Conjunctivitis | 60 (48%) | 51 (54%) | 9 (31%) |
| Coryza | 56 (45%) | 43 (45%) | 13 (45%) |
| Headache | 103 (83%) | 80 (84%) | 23 (79%) |
| Confusion | 15 (12%) | 9 (9%) | 6 (21%) |
| Other | 48 (39%) | 32 (34%) | 16 (55%) |
| Complication | |||
| None | 94 (76%) | 72 (76%) | 22 (75%) |
| Pneumonia | 5 (4%) | 3 (3%) | 2 (7%) |
| Diarrhea | 17 (14%) | 13 (14%) | 4 (14%) |
| Otitis | 2 (2%) | 2 (2%) | 0 (0%) |
| Eye problems | 4 (3%) | 4 (4%) | 0 (0%) |
| Other | 7 (6%) | 6 (6%) | 1 (3%) |
| Death | 0 (0%) | 0 (0%) | 0 (0%) |
| Hospitalized | 110 (89%) | 86 (90%) | 24 (83%) |
| NCCD | 108 (98%) | 84 (98%) | 24 (100%) |
| Other national specialty hospital | 2 (2%) | 2 (2%) | 0 (0%) |
| Length of hospitalization | 7 days (5–8) | 7 days (5–7) | 6 days (5–8) |
| Number of secondary cases | |||
| 0 | 74 (60%) | 53 (56%) | 21 (72%) |
| 1 | 24 (19%) | 20 (21%) | 4 (14%) |
| 2 | 15 (12%) | 12 (13%) | 3 (10%) |
| 3 | 8 (6%) | 7 (7%) | 1 (3%) |
| 4 | 2 (2%) | 2 (2%) | 0 (0%) |
| 5 | 1 (1%) | 1 (1%) | 0 (0%) |
| Any secondary casesb | 50 (40%) | 42 (44%) | 8 (28%) |
Abbreviations: IQR, interquartile range; NCCD, National Center for Communicable Diseases.
a
Includes 66 (69%) cases with unknown vaccination status.
b
P = .11 by χ2.