| Common abnormalities | Atypical abnormalities | ||
---|---|---|---|---|
Factors | Unadjusted OR (95% CI) | Adjusted OR (95% CI) | Unadjusted OR (95% CI) | Adjusted OR (95% CI) |
High risk for both T21 and T18 | 38.50 (20.80–71.25)* | 12.14 (6.01–24.53)* | 1.70 (0.22–12.87) | 0.17 (0.02–1.67) |
Risk of T21 > 1 in 100 | 8.08 (4.84–13.49)* | 5.51 (3.26–9.31)* | 2.37 (0.99–5.67) | 1.44 (0.56–3.70) |
NT ≥ 3.5 mm, | 8.99 (6.03–13.42)* | 4.05 (2.56–6.41)* | 6.58 (2.81–15.42)* | 6.43 (2.70–15.33)* |
Low PAPP-A | 9.42 (5.46–16.23)* | 4.49 (2.16–9.35)* | 6.14 (2.02–18.67)* | 4.74 (1.49–15.01)* |