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Table 1 Patients’ variables and measurement tools used at each data collection time point

From: Family-based intervention for patients with type 2 diabetes via WeChat in China: protocol for a randomized controlled trial

Variable Measurement tools/questions Baseline 6 mth 12 mth
Demographic measures Sex, date of birth, ethnicity, education level, job, health insurance, marital status, annual income, family population composition   
Health status Duration, therapeutic regimen, complications and co-morbidities, hospital visits due to diabetes  
Behavior Adherence to medication (Morisky Scale), activities of self-management (SDSCA)
Psychosocial variables Risk Perception Survey–Diabetes Mellitus (RPS-DM), perceived family support (DFBC), diabetes-related knowledge, source of diabetes-related knowledge, perceived benefits and barriers to diabetes self-care
Biomedical measures HbA1c, weight, height, waist circumference, hip circumference, blood pressure, BMI, blood glucose (fasting plasma glucose and 2 h post-load glucose)