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

. 2018 Dec 20;20(12):e11093. doi: 10.2196/11093

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

©Melissa C Kay, Jasmine Burroughs, Sandy Askew, Gary G Bennett, Sarah Armstrong, Dori M Steinberg. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 20.12.2018.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in the Journal of Medical Internet Research, is properly cited. The complete bibliographic information, a link to the original publication on http://www.jmir.org/, as well as this copyright and license information must be included.

PMC Copyright notice

Proportion of participants with a complete tracking week as measured by a completed IVR call or SMS text messages, by study week and income level (N=38).