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Table 2 Description of NHS-DPP intervention delivery

From: The NHS Diabetes Prevention Programme: an observational study of service delivery and patient experience

Provider A Provider B Provider C Provider D
Site A1 Site A2 Site B1 Site B2 Site C1 Site C2 Site D1 Site D2
What: Materials
Visual aids; posters; activity cards; worksheets; workbooks Visual aids; posters; activity cards; worksheets; workbooks PowerPoint; visual aids; exercise bands; workbooks PowerPoint; visual aids; activity cards; exercise bands; workbooks Pedometers; posters; visual aids; activity cards; workbooks Pedometers; posters; visual aids; activity cards; workbooks Visual aids; worksheets; external leaflets; workbooks Visual aids; worksheets; external leaflets; exercise bands; pedometers; workbooks
Materials in line with plans?
✘ not enough handbooks weeks 1–3; no PowerPoint in weeks 1–7 ✘ no pedometers until week 7; no weighing scales in sessions 6 and 12 ✘ no workbooks in session 9; no weighing scales in session 10
What: Procedures
Weigh-ins; goal setting; self-monitoring; barriers and solutions; government guidelines; sugar servings; food swaps Weigh-ins; goal setting; self-monitoring; barriers and solutions; government guidelines; food swaps Weigh-ins, goal setting; self-monitoring; fat models; quiz, barriers and solutions; food labelling; one-to-one reviews Weigh-ins; goal setting; self-monitoring; fat, glucose and artery models; quiz; barriers and solutions; food labelling; one-to-one reviews Weigh-ins; goal setting; self-monitoring; quizzes; barriers and solutions; government guidelines; carbohydrate and fat servings; food labelling Weigh-ins; goal setting; self-monitoring; quizzes; barriers and solutions; government guidelines; carbohydrate servings; food labelling Weigh-ins; goal setting; self-monitoring; barriers and solutions; government guidelines; sugar servings; food labelling; food swaps; one-to-one reviews Weigh-ins; goal setting; self-monitoring; barriers and solutions; government guidelines; sugar servings; food labelling; food swaps; one-to-one reviews
Who provided: Facilitator backgrounds
Public health; Nutrition; Psychology; Nutrition therapist; Teacher; Personal trainer Personal training; Cardiac rehabilitation Environmental science; Nutritional therapy; Sport’s science; Personal training Nutrition & community health; Nutritionist; Nutrition; Sports nutrition; Sports & coaching Sports health & nutrition; Nutrition Health psychology; Teacher; Gym instructor; Mental health; Nutrition & health; Physical health & exercise Personal training; Health sciences; Health trainer; Nutrition Health promotion; Health psychology; Psychotherapist
Who provided: Experience of facilitators delivering NHS-DPP (ranges)
0–29 months 2–12 months 4–12 months 4–24 months 2–12 months 0–19 months 1–36 months 3–13 months
Group size (median)
12 14 17 15 12 10.5 8 6
Group size in line with plans?
✘ Some groups > 20 ✘ Some groups > 20 ✘ Some groups > 20 ✘ Some groups > 20
Where
Community centre Hotel; Leisure centre GP surgery Leisure centre Community centre Chapel hall; Charity building Leisure centre Community centre
When and how much: Dose and scheduling
Sessions 3 and 4 delivered together; due to staff absence; maintenance sessions spaced 1–3 months apart instead of monthly No. of sessions in accordance with plans; maintenance sessions spaced 1–3 months apart instead of monthly No. of sessions in accordance with plans; 3-month gap before maintenance sessions No. of sessions in accordance with plans; 2-month gap before maintenance sessions No. of sessions in accordance with plans; Session 3 rescheduled after session 6 due to staff illness No. of sessions in accordance with plans; Session 14 rescheduled the following month due to staff illness No. of sessions in accordance with plans; 8-week instead of 4-week gap before maintenance sessions No. of sessions in accordance with plans; Session 3 rescheduled due to staff absence
Dose and scheduling in line with plans?
Tailoring of intervention
Tailored to group demographic (e.g. discussions about Asian foods and lifestyles) Tailored to group questions Tailored to group questions; reviews tailored to individual; local services signposted Tailored to group questions; exercise advice based on ability; reviews tailored to individual Tailored to group demographic; exercise advice based on ability Tailored to group questions Tailored to group questions; reviews tailored to individual; local services signposted Tailored to group questions; reviews tailored to individual; local services signposted
Modifications to planned intervention
Session 7: BDA factsheet provided;
Session 12: resistance exercises demonstrated only
Session 12: resistance exercises demonstrated only No Session 7: reduced gym memberships offered Session 9: current news stories Session 10: content missed due to staff absence Session 13: British Heart Foundation ‘Eat Better’ booklet provided Session 2: recipe books provided;
Session 9: wellbeing leaflet provided
  1. The table headings correspond to the headings from the TIDieR framework [13], with some adaptation from the researcher data collection form used in the field (see Additional file 1). In each table, providers are labelled A-D and the two sites observed for each provider are labelled 1 and 2 (e.g. Site A1, A2; B1, B2, etc.)
  2. The number of group cohorts observed at each site are as follows: Site A1 = 3 cohorts; Site A2 = 3 cohorts; Site B1 = 2 cohorts; Site B2 = 1 cohort; Site C1 = 2 cohorts; Site C2 = 2 cohorts; Site D1 = 3 cohorts; Site D2 = 2 cohorts