Variable | Component | Measurement tools/questions | Baseline | 12 months | 24 months |
---|---|---|---|---|---|
Socio-demographic measures | Age, sex, marital status, education, religion, occupation, household size, and monthly household expenditure | ✓ | ✓ | ✓ | |
Behavioural measures | Tobacco use | WHO STEPS questionnaire [38] | ✓ | ✓ | ✓ |
Alcohol use | WHO STEPS questionnaire [38] | ✓ | ✓ | ✓ | |
Physical activity | Global Physical Activity Questionnaire [39] | ✓ | ✓ | ✓ | |
Sedentary behaviour | Time spent in front of a screen [40] | ✓ | ✓ | ✓ | |
Diet | Food Frequency Questionnaire adapted from PROLIFE study [41] | ✓ | ✓ | ✓ | |
Diabetes knowledge | Barriers to healthy eating | Scale designed for trial | ✓ | ✓ | ✓ |
Barriers to physical activity | Adapted from the scale designed by Booth et al. [42] | ✓ | ✓ | ✓ | |
Self-efficacy (diet and physical activity) | Adapted from the Nutrition and physical Activity self-efficacy scales designed by Schwarzer and Renner [43] | ✓ | ✓ | ✓ | |
Psychosocial measures | Depression | Patient Health Questionnaire-9 amended in line with CURES-65 study [44] | ✓ | ✓ | ✓ |
Stress | ✓ | ✓ | ✓ | ||
Anxiety | General anxiety disorder scale [47] | ✓ | ✓ | ✓ | |
Health-related quality of life | Short Form-36 [48] | ✓ | ✓ | ✓ | |
Social support | ENRICHD social support scale [49] | ✓ | ✓ | ✓ | |
Life satisfaction | How satisfied are you with your life as a whole? | ✓ | ✓ | ✓ | |
Medical history | Use of any medications, family history of diabetes, heart disease or stroke, history of hypertension, and history of high cholesterol | ✓ | ✓ | ✓ | |
Clinical measures | Anthropometry | Waist circumference (Seca measuring tape) [38] Hip circumference [38] | ✓ | ✓ | ✓ |
Height (Seca stadiometer) [38] | ✓ | ✓ | ✓ | ||
Weight (TANITA body composition analyser) [38] | ✓ | ✓ | ✓ | ||
Bioimpedance (TANITA body composition analyser) [38] | ✓ | ✓ | ✓ | ||
Blood pressure | Omron automatic blood pressure monitor [38] | ✓ | ✓ | ✓ | |
Biochemical measures | Pathology | Glycaemic control (fasting plasma glucose and 2 hour post load glucose, HbA1c), lipid profile (total cholesterol, HDL, LDL, triglycerides), and fibrinogen | ✓ | ✓ | ✓ |
Cost effectiveness analysis | Healthcare utilisation | Direct and indirect costs associated with outpatient and inpatient healthcare services, sources of financing, and time away from work due to ill health | ✓ | ✓ | ✓ |
Program evaluation | Knowledge assessment | Pre and post test | ✓ | ||
Training evaluation | Appropriateness of training | ✓ | |||
Group session evaluation | Quality, appropriateness and usefulness of group sessions, engagement/involvement and ongoing support | 4 months | 8 months | 12 months | |
Other evaluation | Use of peer leader workbook, participant handbook, implementation fidelity and challenges and barriers | 4 months | 8 months | 12 months |