panss: PANSS data

In FLIM: Farewell’s Linear Increments Model

Description

The PANSS or the Positive and Negative Syndrome Scale is a medical scale used for measuring symptom severity of patients with schizophrenic conditions. panss contains data from a longitudinal study where 3 different treatments were considered. Patients were followed for 8 weeks and PANSS score was recorded on week 0, 1, 2, 4, 6 and 8. The lower PANSS score a patient has, the less symptoms. Data was extracted from a larger, and confidential, set of clinical trial data from a randomised clinical trial.

Usage

data(panss)

Format

A data frame with 685 observations on the following 4 variables.

treat

a factor variable with 3 levels

time

observation times

Y

PANSS score

id

id number

Note

Data was reshaped from the source with reshape

Source

http://www.lancaster.ac.uk/staff/diggle/APTS-data-sets/PANSS_short_data.txt

P. Diggle. Dealing with missing values in longitudinal studies. In Recent Advances in the Statistical Analysis of Medical Data, editor, B.S. Everitt and G. Dunn, pages 203<e2><80><93>228, 1998.

Examples

library(FLIM)	
data(panss)
head(panss, 8)

Example output

Loading required package: zoo

Attaching package: 'zoo'

The following objects are masked from 'package:base':

    as.Date, as.Date.numeric

Loading required package: MASS
  treat time   Y id
1     1    0  91  1
2     2    0  72  2
3     1    0 108  3
4     1    1 110  3
5     1    0 106  4
6     1    1  93  4
7     1    0  77  5
8     1    1  80  5

FLIM documentation built on May 29, 2017, 11:30 p.m.