Table 4—

Absolute risk of a major or minor congenital anomaly categorized according to periconceptional GHb SD

ReferenceGHb SDGHb (%)No. congenital anomaliesNo. birthsAbsolute risk of a congenital anomaly (%)
32NA*0290.0
33NA*3427.1
34NA*6639.5
627.5080.0
638.50150.0
6510.52258.0
6712.51156.7
6914.531421.4
61015.53650.0
1306.10170.0
132842814.3
1341062623.1
13511.241625.0
14149.44616.6
1425.61472.1
1446.271704.1
1487.582523.2
14128.761334.5
1526.10370.0
1538.21313.2
1549.30100.0
15610.3050.0
162NA*61254.8
163NA*51144.4
164NA*4884.5
8,91413.6103132.3
8,91514.451241.7
8,969.3102663.8
8,9810.2101935.2
8,91111.98978.2
  • *

    * GHb SDs were available in the original article even though the GHb percent values were not.

  • GHb percent value was equal to the mean of control assay.

  • Values of GHb SDs >12 were truncated to 12 in the analyses.