Table 3 Overview of costs of the PRO-FIT intervention in Euros per participant

Development

 Developmental costs of brochure and coaching logs

Content development (30 h) by junior researcher

Concept development/graphic design (24 h) by graphic designer

Final development (12 h) by brochure designer

€ 35.75/h

€ 75/h

€ 65/h

Є 2.80

 Computer-based part of intervention, including website and application for providing computer-tailored advice

Web development (12 h) by web-developer

Registration website (once)

Development/adjustment tailoring application by junior researcher (216 h)

Account tailoring application

€ 65/h

€ 53.95^§

€ 35.75/h

€ 3,930.25^§

Є 5.44

 Brochures, logs, website and tailoring application

Printing of brochure/coaching logs

Hosting website

Hosting tailoring application

€ 0.10/piece

€ 119.40/year^§

€ 171/year^§

Є 1.64

Implementation based on 2,700 participants and an implementation period of 5 years

 Training of lifestyle coaches

A 3-day Motivational Interviewing workshop

5 lifestyle coaches, 3 days, 8 h/day

Supervisor, 3 days, 8 h/day

€ 5,100^§

€ 38.38/h

€ 35.75/h

Є 3.94

 Supervision of lifestyle coaches (10 meetings of 2 h each)

Meeting rooms rental costs

5 lifestyle coaches

Supervisor

€ 11.50/room/h^§

€ 38.38/h

€ 35.75/h

Є 1.77

 Counselling

1 face-to-face counselling session (45 min) by lifestyle coach

5 telephone booster sessions (15 min/session) by lifestyle coach

Administrative work (25 min/participant) by lifestyle coach

Travelling (82 km/participant and 1 h/participant)

€ 38.38/h

€ 38.38/h

€ 38.38/h

€ 0.20/km

€ 38.38/h

Є 147.64

Total intervention costs

Є 163.13