Table 1.
Comparisons of maternal characteristics and clinical outcomes before and after the emergence of omicron variant
| Characteristics | Before omicron(N=130) | After omicron(N=94) | P | |
|---|---|---|---|---|
| Age | 32.3 ± 4.9 | 32.1 ± 4.3 | .754 | |
| Nulliparity* (%) | 66 (51.6) | 47 (50.0) | .818 | |
| GA at admission | ||||
| 1st trimester, n (%) | 19 (14.6) | 13 (13.8) | .002 | |
| 2nd trimester, n (%) | 42 (32.3) | 12 (12.8) | ||
| 3rd trimester, n (%) | 69 (53.1) | 69 (73.4) | ||
| Number of Vaccine doses (%) | ||||
| None | 121 (93.1) | 64 (68.1) | < .001 | |
| First | 3 (2.3) | 6 (6.4) | ||
| Second | 6 (4.6) | 21 (22.3) | ||
| Boosted | - | 3 (3.2) | ||
| Co-morbidity (%) | ||||
| Obesity | 14 (10.8) | 12 (12.8) | .645 | |
| DM | 10 (7.7) | 9 (9.6) | .618 | |
| HTN | 4 (3.1) | 3 (3.2) | 1.000 | |
| Asthma | 3 (2.3) | 1 (1.1) | .641 | |
| Clinical severity during admission (%) | ||||
| Asymptomatic or Mild | 91 (70.0) | 84 (89.4) | < .001 | |
| Moderate or Serious | 39 (30.0) | 10 (10.6) | ||
| Oxygen support requirement (%) | 26 (20.0) | 5 (5.3) | .002 | |
| Nasal or Mask | 20 (15.4) | 5 (5.3) | .001 | |
| High frequency | 5 (3.8) | - | ||
| Invasive Mechanical | 1 (0.8) | - | ||
| Maternal Morbidity (%) | 36 (27.7) | 13 (13.8) | .013 | |
| Pneumonia | 32 (24.6) | 9 (9.6) | .004 | |
| Transfer to Medical specialist | 20 (15.4) | 5 (5.3) | .018 | |
| ICU care | 4 (3.1) | 0 (0.0) | .141 | |
| PTB† | 5 (12.5) | 3 (7.1) | .477 | |
GA, gestational age; DM, diabetes mellitus; HTN, hypertension; ICU, intensive care unit; PTB, preterm birth.
⁎
n = 222.
†
n=82 (before omicron: 40, after omicron: 42).