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Table 3 Data analysis outline

From: Conditional economic incentives and motivational interviewing to improve adolescents’ retention in HIV care and adherence to antiretroviral therapy in Southeast Nigeria: study protocol for a cluster randomised trial

Study objective Outcome variable Type of analysis
Objective 1: effectiveness of intervention Primary outcome  
HIV viral load χ2 test or Fisher’s exact test
Secondary outcomes  
CD4+ count Within group: paired-sample t tests or Wilcoxon signed-rank tests; between group – Student’s t test or Wilcoxon signed-rank tests
Adherence to antiretroviral therapy (ART) χ2 test or Fisher’s exact test
Adherence to hospital appointment Within group: paired-sample t tests or Wilcoxon signed-rank tests; between group – Student’s t test or Wilcoxon signed-rank tests
Objective 2: cost-effectiveness analysis Cost-effectiveness of intervention Incremental cost-effectiveness ratio
Objective 3: qualitative assessment of implementer’s perspective Programme implementer’s perspective In-depth interview (thematic content analysis)