Table 3.
Outcome measures
| Demographics | ||
| Case report form: gender, age, socioeconomic status, employment and education status, current weight loss status, current health status, current computer and phone use | Baseline and 12 months | |
| Primary outcomes | ||
| Body mass index (kg/m2) | Physical measurement of height (m) and weight (kg) | Baseline and 12 months |
| Diet | DINE questionnaire39
4 days of 24 hours dietary recall40 |
Baseline and 12 months |
| Physical activity | 7-Day accelerometry36
7-Day Physical Activity Recall Questionnaire37 |
Baseline and 12 months |
| Secondary outcomes | ||
| Anthropometric changes | Waist and hip circumference (cm) | Baseline and 12 months |
| Health-related quality of life | EQ-5D questionnaire41
ICECAP-A scale42 |
Baseline and 12 months |
| Mental health | General Health Questionnaire43 | Baseline and 12 months |
| National Health Service resource use and participant-borne costs | Specially designed resource use questionnaire | Baseline and 12 months |
| Usability of software | USE questionnaire29 | 12 months |
| Smoking use | Heaviness of Smoking Index44 | 12 months |
| Alcohol use | Alcohol Use Disorders Identification Test45 | 12 months |
| Mediators of change | ||
| Social support | Exercise & Eating Habits Social Support Scales46 | Baseline and 12 months |
| Self-efficacy | Weight47& Exercise Efficacy Lifestyle Scales48 49 | Baseline and 12 months |
| Motivation | Treatment Self-Regulation Questionnaire50 | Baseline and 12 months |
| Social networks | Sociogram51
Egocentric questionnaire51 |
Baseline and 12 months |