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Expanding tuberculosis case detection by screening household contacts.
In the context of decreasing tuberculosis prevalence in China, we examined the effectiveness of screening household contacts of tuberculosis patients.
The present study examined the effectiveness of screening the household contacts without symptoms in 2008 and compared the effectiveness of screening household contacts with and without symptoms.
As shown in Figure 4, this prevalence could have a profound effect on cost-effectiveness of programs and requires careful consideration because screening household contacts irrespective of symptoms might not be cost-effective.
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The second part identified and screened household members for illnesses of interest.
Field research assistants screened household members for fever in their homes once weekly with a standardized questionnaire.
Going door-to-door, city officials screened households, held Sunday screenings to reach labourers and regularly sprayed potential breeding areas.
Field workers then visit the selected postal districts and approach and screen households for eligibility.
Prior to conducting the survey, interviewers obtained informed consent from participants and screened households to ensure eligibility.
Among individuals selected from the completely screened households, 4,517 completed the individual interview, and the computed person-level response rate was 98.4%.
Interviewers (two thirds of whom were African American) with extensive study-specific training screened households for eligibility criteria, which involved self-reported black or African American race, birth date during 1936 through 1950, and Mini-mental Status Examination scores > 16.
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