Table 4 Risk factors associated with miscarriage
From: Maternal hepatitis B virus carrier status and pregnancy outcomes: a prospective cohort study
Cases/Exposed | Crude OR (95 % CI) | Adjusted OR (95 % CI) | |
|---|---|---|---|
Age | |||
<35 | 1067/19691 | 1 | 1 |
≥35 | 148/1313 | 2.22 (1.85–2.66) | 1.17 (0.94–1.45) |
Nulliparity | |||
No | 830/15897 | 1 | 1 |
Yes | 385/5107 | 1.48 (1.31–1.69) | 1.80 (1.54–2.11) |
Education | |||
High school/under | 497/8063 | 1 | |
College/above | 718/12941 | 0.83 (0.67–1.19) | |
Pre-maternal BMI | |||
<25 | 1049/18331 | 1 | |
≥25 | 166/2673 | 1.09 (0.97–1.42) | |
Previous abortion | |||
0 | 673/19063 | 1 | 1 |
1 | 309/1371 | 7.95 (6.85–9.22) | 9.33 (7.97–10.92) |
≥2 | 233/570 | 18.89 (15.72–22.71) | 23.36 (19.10–28.57) |
HBV carrier | |||
No | 1167/20491 | 1 | 1 |
Yes | 48/513 | 1.71 (1.26–2.31) | 1.71 (1.23–2.38) |
IVF | |||
No | 1196/20853 | 1 | 1 |
Yes | 19/151 | 2.37 (1.46–3.84) | 1.78 (1.03–3.05) |