Table 1. Maternal features of pregnant women with positive or negative SARS-CoV-2 RT-qPCR test.
| Feature | Positive women (N = 70) | Negative women (N = 170) | OR (95% CI) | aOR (95% CI)** |
|---|---|---|---|---|
| No. (%)* | No. (%)* | |||
| Age, y | ||||
| <19 | 13 (19) | 27 (16) | Referent group | Referent group |
| 20–34 | 46 (66) | 109 (64) | 0.9 (0.4–1.8) | 1.2 (0.5–2.7) |
| >35 | 11 (16) | 34 (20) | 0.7 (0.2–1.7) | 1.1 (0.4–2.9) |
| Median, range | 26, 13–45 | 29, 13–45 | ||
| Missing data | 0 | 0 | ||
| Occupation | ||||
| At home | 41 (59) | 100 (58) | Omitted | Omitted |
| Employee | 3 (4) | 10 (6) | ||
| Student | 3 (4) | 2 (1) | ||
| Pre-graduate | 2 (3) | 1 (<1) | ||
| Unknown | 21 (30) | 57 (33) | ||
| Missing data | 0 | 0 | ||
| Body Mass Index, kg/m2 | ||||
| Normal | 13 (20) | 25 (16) | Referent group | Referent group |
| Overweight | 27 (41) | 56 (35) | 0.9 (0.4–2) | 1 (0.4–2.3) |
| Obese | 26 (39) | 78 (49) | 0.6 (0.3–1.4) | 0.7 (0.3–1.6) |
| Median, range | 29, 19–57 | 30, 19–55 | ||
| Missing data | 4 | 11 | ||
| Pre-existing comorbidities | ||||
| None | 59 (84) | 128 (75) | Referent group | Referent group |
| Any | 11 (15) | 42 (23) | 0.6 (0.3–1.2) | (0.5 (0.2–1.2) |
| Hypertension | 2 (3) | 8 (5) | 0.5 (0.1–2.6) | 0.4 (0.1–2.3) |
| Asthma | 0 | 2 (1) | 0 | 0 |
| Cardiac disease | 1 (1) | 2 (1) | 1 (0.1–12) | 1 (0.1–11.7) |
| Arthritis | 2 (3) | 2 (1) | 3.2 (0.5–20) | 1.8 (0.2–13) |
| Diabetes mellitus | 2 (3) | 10 (6) | 0.6 (0.2–2.4) | 0.2 (0.02–1.6) |
| Hypothyroidism | 3 (4) | 18 (10) | 0.1 (0.02–1.1) | 0.3 (0.09–1.1) |
| Lupus | 1 (1) | 0 | omitted | omitted |
| Missing data | 0 | 0 | ||
| Multiple pregnancy | 3 (4) | 13 (8) | 0.5 (0.1–1.9) | 0.6 (0.1–2.5) |
| Missing data | 0 | 0 | ||
| Gestational Diabetes | 5 (7) | 12 (7) | 1 (0.3–3) | 2.2 (0.6–8.6) |
| Missing data | 0 | 0 | ||
| Gestational age at the time of admission, w | ||||
| <24 | 7 (10) | 10 (6) | Referent group | Referent group |
| 25–27 | 0 | 8 (5) | 0 | 0 |
| 28–32 | 8 (11) | 10 (6) | 1.1 (0.3–4.3) | 1.1 (0.2–5.2) |
| 33–36 | 9 (13) | 27 (16) | 0.5 (0.1–1.6) | 0.5 (0.1–2.3) |
| >37 | 46 (66) | 113 (67) | 0.6 (0.2–1.6) | 0.5 (0.2–2.2) |
| Median, range | 38, 16–41 | 38, 7–42 | ||
| Missing data | 0 | 2 | ||
| Smoking | 1 (<1) | 3 (2) | Omitted | |
| Missing data | 5 | 10 | ||
| Gravida | ||||
| 1 | 26 (37) | 53 (31) | Referent group | Referent group |
| 2 | 30 (43)a | 46 (27)b | 1.4 (0.7–2.7) | 1.3 (0.6–2.9) |
| >3 | 14 (20)a | 70 (41)b | 0.4 (0.2–0.9) | 0.5 (0.2–1.2) |
| Median, range | 2, 1–5 | 2, 0–10 | ||
| Missing data | 0 | 1 | ||
| Para | ||||
| 0 | 56 (81)a | 109 (64)b | Referent group | Referent group |
| 1 | 11 (16) | 43 (25) | 0.5 (0.2–1.1) | 0.6 (0.3–1.5) |
| >2 | 2 (3) | 18 (11) | 0.3 (0.1–1.2) | 0.6 (0.1–2.5) |
| Median, range | 0, 0–3 | 0, 0–9 | ||
| Missing data | 0 | 1 | ||
| Abortion | ||||
| 0 | 47 (67) | 105 (61) | Referent group | Referent group |
| 1 | 18 (26) | 42 (25) | 0.9 (0.5–1.8) | 0.9 (0.4–2) |
| >2 | 5 (7) | 24 (14) | 0.4 (0.1–1.2) | 0.6 (0.2–1.8) |
| Median, range | 0, 0–9 | 0, 0–4 | ||
| Missing data | 0 | 0 | ||
| Previous cesarean | ||||
| 0 | 37 (54) | 100 (59) | Referent group | Referent group |
| 1 | 20 (29) | 42 (25) | 1.3 (0.7–2.5) | 1.5 (0.7–3.1) |
| 2 | 9 (13) | 23 (13) | 1 (0.4–2.4) | 0.9 (0.3–2.5) |
| >3 | 3 (4) | 5 (3) | 1.6 (0.4–7.3) | 0.9 (0.1–5.6) |
| Median, range | 0, 0–3 | 0, 0–3 | ||
| Missing data | 1 | 0 |
*Percentages calculated excluding missing values
**Adjusted for maternal age, BMI, pre-existing comorbidities, gestational age at the time of admission. Each subscript letter denotes a subset of pregnant women category whose column proportions do not differ significantly from each other at the P<0.05 level in crosstab analysis.