snijders_etal1999_t21: Background risk for trisomy 21 (Down syndrome)

In hoehleatsu/trisomy21risk: Risk Calculation for T21 from a First Trimester Combined Test

Description

A dataset containing the background odds for trisomy 21 (Down syndrome) as a function of maternal age and gestational age. The data originate from Table 4 of Snijders et al. (1999).

Usage

snijders_etal1999_t21

Format

A data frame with 18 rows and 7 variables:

Age

Maternal age in years

W10

Odds for T21 in the form $1:x$ at a gestational age of 10 weeks.

W12

Odds for T21 in the form $1:x$ at a gestational age of 12 weeks.

W14

Odds for T21 in the form $1:x$ at a gestational age of 14 weeks.

W16

Odds for T21 in the form $1:x$ at a gestational age of 16 weeks.

W20

Odds for T21 in the form $1:x$ at a gestational age of 20 weeks.

W40

Odds for T21 in the form $1:x$ at a gestational age of 40 weeks.

Source

Snijders, R. J., K. Sundberg, W. Holzgreve, G. Henry, and K. H. Nicolaides. 1999. “Maternal age- and gestation-specific risk for trisomy 21.” Ultrasound Obstet Gynecol 13 (3): 167–70.

hoehleatsu/trisomy21risk documentation built on Sept. 19, 2020, 8:44 p.m.