Table 2 Description of NHS-DPP intervention delivery
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 |