Table 3 Cost of major category development activities in systematic intervention development process (base scenario)

Step 1

1

Audit and analysis of diabetic retinopathy screening uptake

0.00

0.00

0.00

Step 2

2

Qualitative patient interviews

5,350

3,888

9,238

Step 2

3

Qualitative professional interviews

4,251

3,165

7,416

Step 2

4

Coding interviews

1,500

0

1,500

Step 3a

5

Mapping process

2,382

0

2,382

Step 3a

6

Identifying effective PPI recruitment strategies for clinical trials

1611

0

1611

Step 3b

7

Consensus process

12157

1746

13,903

Step 3b

8

Populating the APEASE criteria

2,514

105

2,619

Step 3b

9

Intervention design

1,458

130

1588

Step 4

10

Logic model

229

0

229

Total cost

31,451

9,034

40,485