birth {catdata}

Birth

Description

The birth data contain information about birth and pregnancy of 775 children that were born alive in the time from 1990 to 2004. The data were collected from internet users recruited on french-speaking pregnancy and birth websites

Usage

data(birth)

Format

A data frame with 775 observations on the following 25 variables.

IndexMother

ID variable

Sex

Sex of child: male = 1, female = 2

Weight

Weight of child at the birth in grams

Height

Height of child at the birth in centimeter

Head

Head circumference of child at the birth in centimeter

Month

Month of birth from 1 to 12

Year

Year of birth

Country

Country of birth: France (FR), Belgium (BE), Switzerland (CH), Canada (CA), Great Britain (GB), Germany (DE), Spain (ES), United States (US)

Term

Term of pregnancy in weeks from the last menstruation

AgeMother

Age of mother on the day of birth

Previous

Number of pregnancies before

WeightBefore

Weight of mother before the pregnancy

HeightMother

Height of mother in centimeter

WeightEnd

Weight of mother after the pregnancy

Twins

Was the pregnancy a multiple birth? no = 0, yes = 1

Intensive

Days that child spent in intensive care unit

Cesarean

Has the child been born by cesarean section? no = 0, yes = 1

Planned

Has the cesarean been planned? no = 0, yes = 1

Episiotomy

Has an episiotomy been made? no = 0, yes = 1

Tear

Did a perineal tear appear? no = 0, yes = 1

Operative

Has an operative aid like delivery forceps or vakuum been used? no = 0, yes = 1

Induced

Has the birth been induced artificially? no = 0, yes = 1

Membranes

Did the membrans burst before the beginning of the throes? no = 0, yes = 1

Rest

Has a strict bed rest been ordered to the mother for at least one month during the pregnancy? no = 0, yes = 1

Presentation

Presentation of the child before the birth? cephalic presentation = 1, pelvic presentation = 2, other presentation (e.g. across) = 3

Source

see Boulesteix (2006), Maximally selected chi-squared statistics for ordinal variables, Biometrical Journal, 48, 451–462.

Examples

## Not run: 
##look for:
if(interactive()){vignette("loglinear-birth")}
if(interactive()){vignette("multivariate-birth1")}
if(interactive()){vignette("multivariate-birth2")}

## End(Not run)