Table 5 Univariate and multivariable logistic regression analysis for undergoing Combined Ultrasound and Biochemical test (CUB) in relation to maternal age divided into two age groups and to specified background characteristics
From: Prenatal diagnosis in Sweden 2011 to 2013—a register-based study
Maternal age <35 years | Maternal age ≥35 years | |||||||
|---|---|---|---|---|---|---|---|---|
Variable | Crude OR | CI 95% | Adjusted OR a | Adjusted CI 95% | Crude OR | CI 95% | Adjusted ORa | Adjusted CI 95% |
Educational level | ||||||||
Elementary school, high school | 1 | 1 | 1 | 1 | ||||
University level | 2.03 | 1.98–2.07 | 1.79 | 1.75–1.83 | 1.86 | 1.79–1.93 | 1.53 | 1.47–1.61 |
Body mass index (kg/m2) | ||||||||
< 25 | 1 | 1 | 1 | 1 | ||||
≥ 25 | 0.75 | 0.73–0.76 | 0.84 | 0.82–0.86 | 0.65 | 0.63–0.68 | 0.76 | 0.73–0.80 |
Main occupation | ||||||||
Employed, student, parental leave | 1 | 1 | 1 | 1 | ||||
Unemployed, sick leave, other | 0.51 | 0.49–0.53 | 0.70 | 0.67–0.74 | 0.46 | 0.44–0.49 | 0.64 | 0.59–0.70 |
Country of birth | ||||||||
Sweden | 1 | 1 | 1 | 1 | ||||
Other | 0.60 | 0.58–0.61 | 0.76 | 0.74–0.79 | 0.55 | 0.53–0.57 | 0.74 | 0.70–0.78 |
Smoking at first visit at antenatal care | ||||||||
No | 1 | 1 | 1 | 1 | ||||
Yes | 0.62 | 0.59–0.65 | 0.87 | 0.82–0.92 | 0.59 | 0.54–0.64 | 0.74 | 0.66–0.84 |
Self-rated health prior to pregnancy | ||||||||
Very good and good | 1 | 1 | 1 | 1 | ||||
Poor and very poor | 0.85 | 0.74–0.98 | 0.96 | 0.82–1.13 | 0.62 | 0.50–0.76 | 0.80 | 0.63–1.02 |
Counseling due to fear of childbirth | ||||||||
No | 1 | 1 | 1 | 1 | ||||
Yes | 1.41 | 1.36–1.46 | 1.38 | 1.32–1.45 | 1.40 | 1.32–1.48 | 1.27 | 1.18–1.28 |
Treatment of psychiatric disorder | ||||||||
No | 1 | 1 | 1 | 1 | ||||
Yes | 1.03 | 0.99–1.08 | 1.15 | 1.09–1.22 | 1.04 | 0.98–1.11 | 1.16 | 1.05–1.28 |