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Registration

Field Before After
Trial End Date January 31, 2020 January 01, 2021
Last Published March 15, 2018 03:30 PM January 09, 2020 12:24 AM
Intervention End Date June 30, 2017 November 01, 2017
Randomization Method The employer has approximately 200 worksites. We will first eliminate the fewer than 20% of worksites that are geographically difficult to reach for researchers or have atypical insurance coverage. We will then randomly assign 25 of the worksites to the treatment arm and 25 to the control arm for primary data collection. Additional secondary data will also be collected from all worksites. The employer has approximately 200 worksites. We will first eliminate the fewer than 20% of worksites that are geographically difficult to reach for researchers or have atypical insurance coverage. We then randomly assigned 25 of the worksites to the treatment arm and 25 to the control arm for primary data collection. Additional secondary data will also be collected from all worksites.
Planned Number of Observations Primary data: 5,000 employees; Secondary data: additional 12,000 employees Primary data: 14,000 employees; Secondary data: additional 34,000 employees.
Sample size (or number of clusters) by treatment arms Primary data will be collected from 50 randomly assigned worksites (25 sites in the treatment arm and 25 sites to the control arm), with about 100 employees at each site. Additional data will be collected from secondary sources for these 50 plus approximately 120 additional sites. Primary data will be collected from 50 randomly assigned worksites (25 sites in the treatment arm and 25 sites to the control arm), with about 100 employees at each site at any given time. Additional data will be collected from secondary sources for these 50 plus approximately 120 additional sites.
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Analysis Plans

Field Before After
Document
Analysis+Plan+Phase+2+Final+2020-1-7.pdf
MD5: dd129556dd943ad78fd2485155a55111
SHA1: 9f2b08f44a7511fc6608fa6678bab4639356961a
Title Analysis Plan Phase 2 Final 2020-1-7
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Field Before After
Document
Analysis+Plan+Phase+2+Final+2020-1-7.pdf
MD5: dd129556dd943ad78fd2485155a55111
SHA1: 9f2b08f44a7511fc6608fa6678bab4639356961a
Title Analysis Plan Phase 2 Final 2020-1-7
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Other Primary Investigators

Field Before After
Affiliation Harvard School of Public Health University of Chicago Harris School of Public Policy
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