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Table 1 Primary and secondary outcomes with definitions

From: A crowdsourced intervention to promote hepatitis B and C testing among men who have sex with men in China: study protocol for a nationwide online randomized controlled trial

Primary outcome Definition
Confirmed HBV and HCV test uptake Defined as men who had both HBsAg test uptake and anti-HCV IgG test uptake confirmed through electronic submission of a test report photo showing serology results, age of tester, sex of tester, and date of test within four weeks of enrolment
Secondary outcomes  
Confirmed HBV test uptake Defined as men who had HBsAg test uptake confirmed through electronic submission of a test report photo showing serology results, age of tester, sex of tester, and date of test within four weeks of enrolment
Confirmed HCV test uptake Defined as men who had anti-HCV IgG test uptake confirmed through electronic submission of a test report photo showing serology results, age of tester, sex of tester, and date of test within four weeks of enrolment
Self-reported HBV test uptake Defined as men who had HBsAg uptake within four weeks of enrolment, self-reported in follow-up survey
Self-reported HCV test uptake Defined as men who had anti-HCV IgG uptake within four weeks of enrolment, self-reported in follow-up survey
HBV vaccination uptake Defined as men who had receipt of at least a one dose of the HBV vaccine within four weeks of enrolment, self-reported in follow-up survey
HBV vaccination uptake among men with confirmed susceptibility to HBV infection Defined as men with negative HBsAg and negative anti-HBs results confirmed through electronic submission of a test report photo showing serology results, who had receipt of at least one dose of the HBV vaccine within four weeks of enrolment, self-reported in follow-up survey
HIV test uptake Defined as men who had HIV test uptake within four weeks of enrolment, self-reported in follow-up survey
Chlamydia test uptake Defined as men who had chlamydia test uptake within four weeks of enrolment, self-reported in follow-up survey
Gonorrhoea test uptake Defined as men who had gonorrhoea test uptake within four weeks of enrolment, self-reported in follow-up survey
Syphilis test uptake Defined as men who had syphilis test uptake within four weeks of enrolment, self-reported in follow-up survey
Change in stigma toward people living with HBV Continuous variable, defined as difference between Toronto Chinese HBV Stigma Scale score assessed at follow-up and baseline. Stigma toward people living with HBV will be measured at baseline and follow-up using 20 survey items that are each on a five point Likert scale. The 20 items were originally developed as the Toronto Chinese HBV Stigma Scale (potential range of 20–100), which has been previously validated and correlated to HBV testing behaviours among Chinese populations [39]. Decreased stigma toward people living with HBV will be defined as a mean composite score that is less at follow-up compared to baseline.
Visit with a physician after hepatitis test uptake Defined as men who had HBV and/or HCV test uptake and saw a physician to discuss hepatitis test results within four weeks of enrolment, self-reported in follow-up survey