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PTREND: Stata module for trend analysis for proportions

Author info | Abstract | Publisher info | Download info | Related research | Statistics
Author Info
Patrick Royston () (MRC Clinical Trials Unit, UK)
Abstract

ptrend calculates a chi-square statistic for the trend (regression) of pvar on xvar, where pvar is the proportion rvar/(rvar+nrvar). A variable called _prop, containing the values of pvar, is left behind by ptrend. ptrend also gives a chi-square test for departure from the trend line. ptrendi does the same analysis on user-entered data; the proportions are now p1 = r1/(r1+nr1), p2 = r2/(r2+nr2), etc.

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File URL: http://fmwww.bc.edu/repec/bocode/p/ptrend.ado
File Format: text/plain
File Function: program code
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File URL: http://fmwww.bc.edu/repec/bocode/p/ptrend.hlp
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File Function: help file
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File URL: http://fmwww.bc.edu/repec/bocode/p/ptrendi.ado
File Format: text/plain
File Function: program code
Download Restriction: no
File URL: http://fmwww.bc.edu/repec/bocode/p/ptrendi.hlp
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File Function: help file
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Publisher Info
Software component provided by Boston College Department of Economics in its series Statistical Software Components with number S426101.

Download reference. The following formats are available: HTML, plain text, BibTeX, RIS (EndNote), ReDIF
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Programming language: Stata
Requires: Stata version 4.0
Date of creation: 05 Jun 2002
Date of revision:
Handle: RePEc:boc:bocode:s426101

Note: This module may be installed from within Stata by typing "ssc install ptrend". Windows users should not attempt to download these files with a web browser.
Contact details of provider:
Postal: Boston College, 140 Commonwealth Avenue, Chestnut Hill MA 02467 USA
Phone: 617-552-3670
Fax: +1-617-552-2308
Email:
Web page: http://fmwww.bc.edu/EC/
More information through EDIRC

Order Information:
Web: http://repec.org/docs/ssc.php

For technical questions regarding this item, or to correct its listing, contact: (Christopher F Baum).

Related research
Keywords: nonparametric chi-square test trend

Statistics
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This page was last updated on 2008-5-14.

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