R: Birth weight and ultrasonography

secher {ISwR} | R Documentation

## Birth weight and ultrasonography

### Description

The `secher` data frame has 107 rows and 4 columns. It contains ultrasonographic measurements of fetuses immediately before birth and their subsequent birth weight.

### Usage

    secher

### Format

This data frame contains the following columns:

`bwt`

  a numeric vector, birth weight (g).

`bpd`

  a numeric vector, biparietal diameter (mm).

`ad`

  a numeric vector, abdominal diameter (mm).

`no`

  a numeric vector, observation number.

### Source

D. Kronborg and L.T. Skovgaard (1990), Regressionsanalyse, Table 3.1, FADLs Forlag (in Danish).

Secher et al. (1987), European Journal of Obstetrics, Gynecology, and Reproductive Biology, 24: 1–11.

### Examples

    plot(bwt~ad, data=secher, log="xy")

[Package ISwR version 2.0-7 Index]