Status:
COMPLETED
Eye Examinations as a Gold Standard to Evaluating Survey Instruments
Lead Sponsor:
Harvard School of Public Health (HSPH)
Collaborating Sponsors:
Jingning County in Zhejiang Province in China
Conditions:
Self Report
Questionnaire Design
Eligibility:
All Genders
Phase:
NA
Brief Summary
Objective measures of health are relatively expensive; meanwhile, self-reports are critiqued to be subjective and not comparable. A middle ground approach is to apply the frontier work of vignette met...
Detailed Description
The schools will be visited to announce this project on survey experiment and measuring visual acuity, for which all participants will receive free eye examinations. After receiving consent/assent, tw...
Eligibility Criteria
Inclusion
- • Middle school students (i.e., Grade 7 to Grade12) in Jingning County.
Exclusion
- • Primary school students (i.e., Grade 1 to Grade 6) in Jingning County.
Key Trial Info
Start Date :
September 1 2014
Trial Type :
INTERVENTIONAL
Allocation :
ACTUAL
End Date :
October 1 2014
Estimated Enrollment :
4320 Patients enrolled
Trial Details
Trial ID
NCT02244060
Start Date
September 1 2014
End Date
October 1 2014
Last Update
April 7 2015
Active Locations (1)
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1
Jingning County
Lishui, Zhejiang, China, 323500