Table 3.

Measurement domains, tools, and data collection for the South African Diabetes Prevention Programme (SADPP) pilot phase.

Variable	Components	Measurements Tools/Questions	Reporting in this Paper
General information		Personal details and contacts for follow up	Not reported
Socio-demographic measures		Age, gender, area, community, current marital status, education level, employment, income	Reported
Self-reported medical history	General		Not reported
	Chronic diseases	Diabetes, hypertension, cholesterol, bronchitis/chronic obstructive pulmonary disease, cancer, tuberculosis	Not reported
	Heart health	Jackson heart medical form [24]	Not reported
	medication	Chronic prescription medication	Not reported
	Family medical history	Hypertension, diabetes, heart attack, stroke, cancer	Only familial diabetes history reported
Behavioral measures	Tobacco use	WHO STEPS questionnaire [22]	Reported
	Alcohol use	WHO STEPS questionnaire [22]	Reported
	Sedentary behavior	Time spent in front of a screen	Reported elsewhere [25]
	Sleep	Time, quality	Reported elsewhere [25]
Dietary Measures	24-hour dietary recall Barriers to healthy eating	Single unquantified dietary recall [26]; food frequency for processed food, barriers to fruit and vegetable consumption [27]	Not reported
Physical activity measures	Physical activity pattern	WHO STEPS questionnaire: global physical activity questionnaire (GPAQ) [22]	Reported elsewhere [25]
	Barriers to physical activity	Scale adapted from the one designed by Booth et al. [22]	Reported elsewhere [25]
	Self-efficacy	Scale adapted from the exercise self-efficacy scale (ESES) designed by Schwarzer and Jerusalem [28]	Reported elsewhere [25]
Clinical measures	Waist circumference	Measured between the lower border of the lowest rib and upper border of the iliac crest/pelvic bone to the nearest 0.1 cm	Reported
	Weight	Weight measurement with minimal clothing on a digital (SECA) scale, recorded to the nearest 0.1 kg	Reported (BMI)
	Height	Standing height, minimal clothing, aligning head in a standard anatomical position using a SECA stadiometer
	SBP	Electronic M6 COMFORT OMRON device with an integrated cuff	Reported
	DBP HbA1c	Electronic M6 COMFORT OMRON device with an integrated cuff HbA1c measured using fasting blood and HPLC	Reported
Neighborhood indicators	Stores and facilities, access to services and places, roads and walking paths, places for walking/cycling/playing, surroundings, safety from crime and traffic, personal safety, stranger danger	Neighborhood environment walkability scale (NEWS) Africa Questionnaire [23]	Reported elsewhere [25]
Psychological measures	Chronic stress	Chronic stress scale [29]	Reported elsewhere [25]
	Mood (depression and anxiety)	Patient health questionnaire-9 amended in line with CURES-65 study [30], general anxiety disorder scale [31]	Not reported
	Support networks	ENRICHD social support scale [32]	Not reported
	Quality of life	The MOS 36-item short-form health survey [33]	Not reported
	Life satisfaction	How satisfied are you with your life as a whole?	Not reported

Adapted from Hill et al. 2020 [21]. WHO—World Health organization; BMI—body mass index; SBP—systolic blood pressure; DBP—diastolic blood pressure; HbA1c—glycated haemoglobin; HPLC—high-performance liquid chromatographic.