Table 7.
Selection frequencies for remaining stage 2 (instrument selection), round 2 Delphi items
| Stage 2, Round 2 Questionnaire Item | Outcome | Definition/Instrument | Selection Frequency | Selection Percentage (%) | Retain for Round 3 Delphi |
|---|---|---|---|---|---|
| 4.1 | Completion | % of participants who attended 100% of possible/core/mandatory sessions | 2 | 7 | |
| 4.1 | Completion | % of participants who attended 80% of possible/core/mandatory sessions | 15 | 52 | ✓ |
| 4.1 | Completion | % of participants who attended 70% of possible/core/mandatory sessions | 12 | 41 | |
| 5.1 | Participant satisfaction | Mean OEQ score adapted to suit weight management services | 13 | 45 | ✓a |
| 5.1 | Participant satisfaction | Mean NHS FFT score | 16 | 55 | ✓a |
| 6.1 | Cost effectiveness | The PHE Weight Management Economic Assessment Tool | 18 | 62 | ✓ |
| 6.1 | Cost effectiveness | Cost/kg (based on mean weight loss) | 6 | 21 | |
| 6.1 | Cost effectiveness | Cost per success with success being 5% weight loss | 5 | 17 | |
| 8.1 | Overall measure of comorbidity | Mean CCI score | 2 | 7 | |
| 8.1 | Overall measure of comorbidity | Mean EOSS score | 7 | 24 | ✓b |
| 8.1 | Overall measure of comorbidity | Mean Chronic Disease Score | 3 | 10 | |
| 8.1 | Overall measure of comorbidity | Mean number of dispensed medications per participant | 1 | 3 | |
| 8.1 | Overall measure of comorbidity | I have insufficient knowledge of the instruments and am therefore unable to select one. | 16 | 55 | |
| 9.1 | Depression | Mean HADS questionnaire score of participants | 10 | 34 | |
| 9.1 | Depression | Mean PHQ9 questionnaire score of participants | 12 | 41 | ✓ |
| 9.1 | Depression | Mean Beck Depression Inventory score of participants | 7 | 24 | |
| 10.1 | Importance of weight loss | Mean Dieting Readiness Scale score(s) | 15 | 52 | ✓ |
| 10.1 | Importance of weight loss | Mean DIET score(s) | 8 | 28 | |
| 10.1 | Importance of weight loss | Mean Self‐Efficacy for Eating Behaviours Scale score(s) | 6 | 21 |
Note. Participants were instructed to select the most appropriate definition/instrument for measurement and reporting from the options provided for each outcome. Selection frequency for each option was determined and the option selected most frequently retained for the stage 2, round 3 Delphi.
Abbreviations: SD, standard deviation; IQR, interquartile range; OEQ, Outcomes and Experiences Questionnaire; NHS, National Health Service; FFT, Friends and Family Test; PHE, Public Health England; CCI, Charlson Comorbidity Index; EOSS, Edmonton Obesity Staging System; HADS, Hospital Anxiety and Depression Scale; PHQ‐9, Patient Health Questionnaire‐9; DIET, Dieter's Inventory of Eating Temptations.
Participants' comments and scores indicated that neither of the suggested instruments was ideal. Therefore, no instrument was selected. These two options will be given as suggestions but other methods could be used.
The majority of participants indicated that they had insufficient knowledge of the instruments and were therefore unable to select which would be most appropriate for use. Consequently, the most frequently selected of the remaining options, mean EOSS score, was retained for the stage 2, round 3.