Obstetrics and Gynecology International / 2018 / Article / Tab 5

Research Article

Evaluating the Agreement of Risk Categorization for Fetal Down Syndrome Screening between Ultrasound-Based Gestational Age and Menstrual-Based Gestational Age by Maternal Serum Markers

Table 5

Agreement of risk categorization between US-based and LMP-based screening.

US-based screeningLMP-based screeningTotalKappa index
High riskLow risk

First trimesterHigh risk255 (6.3%)85 (2.1%)340 (8.4%)0.592
Low risk213 (5.3%)3502 (86.4%)3715 (91.6%)
Total468 (11.5%)3587 (88.5%)4055 (100.0%)
Second trimesterHigh risk485 (12.1%)102 (2.5%)587 (14.6%)0.622
Low risk340 (8.5%)3089 (76.9%)3249 (85.4%)
Total825 (20.5%)3191 (79.5%)4016 (100.0%)
First and second trimesterHigh risk740 (9.2%)187 (2.3%)927 (11.5%)0.615
Low risk553 (6.9%)6591 (81.7%)7144 (88.5%)
Total1293 (16.0%)6778 (84.0%)8071 (100.0%)

Bold indicates the number (%) of agreement of the two types of screening.

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