%skmdata macro

Brief description

A SAS macro for the Kaplan-Meier plot with SGPLOT Procedure.

This software is released under the MIT License, see http://opensource.org/licenses/mit-license.php.

Software information

• Author: Kengo NAGASHIMA
• Version: 1.1.2
• Last Updated Date: Mar. 23, 2017
• System Requirements: SAS 9.4 or later, base SAS, SAS/STAT 14.1 or may be later

Version history

• v1.1.2: fixed a bug: wrong no at risk of the last time point may be produced, if data is sparse
• v1.1.1: fixed a bug: caused by tie data (thanks to Masashi Mikami)
• v1.1.0: extended for competing risk
• v1.0.2: fixed a bug: missing at risk sizes
• v1.0.1: fixed a bug: caused by censored observations
• v1.0.0: first release

Example

Usage

Arguments

• data: input dataset name
• time: time variable
• event: event variable
• group: group variable
• censor_value: code value of censored observations
• out: output dataset name
• timemax: maximum time for no. at risk order
• timeby: increment of the sequence for no. at risk order

If you want to analyze competing risk data

• event_value: code value of competing risk events

Variables in the output data

• time: time
• strata: group
• est: estimated survival function or cif
• lcl: lower confidence limit
• ucl: upper confidence limit
• left: raw no at risk
• atrisk: no. at risk table
• xatrisk: x-axis variable for no. at risk table

If argument 'event_value' is specified

• adjleft: raw adjusted no at risk
• adjatrisk: variable of adjusted no at risk table