Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Scarring Retinopathy of Prematurity

Scarring Retinopathy of Prematurity This article is only available in the PDF format. Download the PDF to view the article, as well as its associated figures and tables. Abstract Sir.—Brown et al,1 in the February 1987 issue of AJDC, reported on scarring retinopathy of prematurity (SROP) and permitted a classic bias to distort their observations. They say that they have such vast amounts of data and missing data (empty cells) that appropriate "data matrices are not amenable to present statistical techniques." The fault is not in statistical techniques, it is in the research structure. The research structure here uses procedures that produce massive attrition, sometimes called "transfer" bias. In their Figs 1, 6, and 7, the attrition of the subjects (SROP and non-SROP) is clearly shown. In Fig 6, by the fourth week of the study period, there are only about 30% of the original infants still contributing data (n = 9, SROP; n = 18, non-SROP). The data (eg, arterial partial pressure of oxygen [Po2] values in Fig 6) are collected from the "sicker" infants in each http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png American Journal of Diseases of Children American Medical Association

Scarring Retinopathy of Prematurity

Loading next page...
 
/lp/american-medical-association/scarring-retinopathy-of-prematurity-Avb7IT5de6
Publisher
American Medical Association
Copyright
Copyright © 1987 American Medical Association. All Rights Reserved.
ISSN
0002-922X
DOI
10.1001/archpedi.1987.04460110019005
Publisher site
See Article on Publisher Site

Abstract

This article is only available in the PDF format. Download the PDF to view the article, as well as its associated figures and tables. Abstract Sir.—Brown et al,1 in the February 1987 issue of AJDC, reported on scarring retinopathy of prematurity (SROP) and permitted a classic bias to distort their observations. They say that they have such vast amounts of data and missing data (empty cells) that appropriate "data matrices are not amenable to present statistical techniques." The fault is not in statistical techniques, it is in the research structure. The research structure here uses procedures that produce massive attrition, sometimes called "transfer" bias. In their Figs 1, 6, and 7, the attrition of the subjects (SROP and non-SROP) is clearly shown. In Fig 6, by the fourth week of the study period, there are only about 30% of the original infants still contributing data (n = 9, SROP; n = 18, non-SROP). The data (eg, arterial partial pressure of oxygen [Po2] values in Fig 6) are collected from the "sicker" infants in each

Journal

American Journal of Diseases of ChildrenAmerican Medical Association

Published: Nov 1, 1987

There are no references for this article.