# EPIDURAL: Traditional Sitting Position Versus Hamstring Stretch... In PASWR: Probability and Statistics with R

 EPIDURAL R Documentation

## Traditional Sitting Position Versus Hamstring Stretch Position

### Description

Initial results from a study to determine whether the traditional sitting position or the hamstring stretch position is superior for administering epidural anesthesia to pregnant women in labor as measured by the number of obstructive (needle to bone) contacts (OC)

### Format

A data frame with 85 observations on the following 7 variables:

Doctor

a factor with levels `Dr. A`, `Dr. B`, `Dr. C`, and `Dr. D`

kg

weight in kg of patient

cm

height in cm of pateint

Ease

a factor with levels `Difficult`, `Easy`, and `Impossible` indicating the physician's assessment of how well bone landmarks can be felt in the patient

Treatment

a factor with levels `Hamstring Stretch` and `Traditional Sitting`

OC

number of obstructive contacts

Complications

a factor with levels ```Failure - person got dizzy```, `Failure - too many OCs`, `None`, `Paresthesia`, and `Wet Tap`

### Source

Ugarte, M. D., Militino, A. F., and Arnholt, A. T. (2008) Probability and Statistics with R. Chapman & Hall/CRC.

### Examples

```
EPIDURAL\$Teasy <-  factor(EPIDURAL\$Ease,
levels = c("Easy", "Difficult", "Impossible"))
X <- table(EPIDURAL\$Doctor, EPIDURAL\$Teasy)
X
par(mfrow = c(2, 2)) # Figure 2.12
barplot(X,
main = "Barplot where Doctor is Stacked \n within Levels of Palpitation")
barplot(t(X),
main = "Barplot where Levels of Palpitation \n is Stacked within Doctor")
barplot(X, beside = TRUE,
main = "Barplot where Doctor is Grouped \n within Levels of Palpitation")
barplot(t(X), beside = TRUE,
main = "Barplot where Levels of Palpitation \n is Grouped within Doctor")
par(mfrow = c(1, 1))
rm(X)

```

PASWR documentation built on May 15, 2022, 5:05 p.m.