Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2013 Sep 23;17(5):R208. doi: 10.1186/cc13016

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

Copyright © 2013 Alrajab et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

PMC Copyright notice

Forest plot for sensitivity, specificity of CXR for the detection of pneumothorax. Inconsistency (I²) describes the percentage heterogeneity across studies that are not due to chance. I² can be calculated as I² =100% 3 (Q²df)/Q (see Figure 4 legend for definition of Q). df = degree of freedom = number of studies-1.