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

. 2008 Sep 15;5(4):A126.

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

This is a publication of the U.S. Government. This publication is in the public domain and is therefore without copyright. All text from this work may be reprinted freely. Use of these materials should be properly cited.

PMC Copyright notice

Process chart This flowchart consists of 4 boxes, which are arranged 1 on top of the other and read from top to bottom. Each box is connected to the box below it with a downward-pointing arrow. The first box says, “Target Population: All women who delivered live infants in Cameron County and Matamoros during the study period (August 21st-November 9th, 2005).” The second box says, “Study Population: Women who delivered live infants during the study period in Cameron County and Matamoros in hospitals with 100 or more deliveries in 2004 (4 hospitals in Cameron County and 6 hospitals in Matamoros).” The third box says, “Sampling: 84 blocks of 2 consecutive days selected during the study period (36 blocks in Cameron County [9 in each study hospital] and 48 blocks in Matamoros [8 in each study hospital]).” The fourth box says, “Women Chosen for the Study: All women who delivered live infants during each of the selected blocks of 2 consecutive days (n = 999) (sample size for Cameron County = 525; sample size for Matamoros = 474).” — Sampling Design of the Surveillance System Used for the Brownsville-Matamoros Sister City Project for Women's Health, August 21-November 9, 2005.