Obstetrics and Gynecology International / 2018 / Article / Tab 4

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 4

Down syndrome screening results and frequency of high/low-risk categorization according to the type of screening.

High risk, n (%)Low risk, n (%)

US-based screening
 (i) Total927 (11.5%)7144 (88.5%)
  (a) First trimester340 (8.4%)3715 (91.6%)
  (b) Second trimester587 (14.6%)3429 (85.4%)
 (ii) Down syndrome detected15/9275/7144
LMP-based screening
 (i) Total1293 (16.0%)6778 (84.0%)
  (a) First trimester468 (11.5%)3587 (88.5%)
  (b) Second trimester825 (20.5%)3191 (79.5%)
 (ii) Down syndrome detected14/12936/6778

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