|
Variables
|
Model 1
|
Model 2
|
|---|
|
aOR (95% CI)
|
aOR (95% CI)
|
|---|
|
Number of observations
|
27,713
|
27,713
|
|
Gestational age at first ANC visit (Continuous)
|
--
|
1.01 (0.99-1.04)
|
|
Gestational age at first ANC visit (Trimester)
| | |
|
1
st
Trimester (ref)
|
1.00
|
--
|
|
2
nd
Trimester
|
0.78 (0.39-1.59)
|
--
|
|
3
rd
Trimester
|
1.03 (0.50-2.13)
|
--
|
|
Parity
| | |
|
Nulliparous (ref)
|
1.00
|
1.00
|
|
Primi/Multiparous
|
1.20 (0.77-1.86)
|
1.20 (0.77-1.86)
|
|
Education
| | |
|
None or primary (ref)
|
1.00
|
1.00
|
|
Secondary or tertiary
|
0.68 (0.34-1.38)
|
0.68 (0.34-1.37)
|
|
Missing
|
0.77 (0.32-1.85)
|
0.76 (0.32-1.84)
|
|
Race
| | |
|
Coloured (ref)
|
1.00
|
1.00
|
|
Black
|
2.03 (1.33-2.10)a
|
2.01 (1.31-3.07)a
|
|
Other
|
2.42 (0.86-6.82)
|
2.43 (0.86-6.83)
|
|
Smoking
| | |
|
Non-smoking (ref)
|
1.00
|
1.00
|
|
Smoking
|
1.10 (0.66-1.84)
|
1.10 (0.66-1.84)
|
|
Missing
|
0.61 (0.30-1.25)
|
0.61 (0.30-1.25)
|
|
Maternal age (continuous)
|
1.03 (1.00-1.07)a
|
1.03 (1.00-1.07)a
|
- All models are adjusted for parity, education, mother’s age, race, and smoking status.
- aOR, Adjusted Odds Ratio.
-
aIndicates a significant aOR at 5% significance.
