Table 1 Eligibility criteria
| Inclusion criteria |
Age ≥ 18 years One of the following conditions: inguinal hernia, gallstones, knee- or hip osteoarthritis Access to the internet Sufficient command of the Dutch language to complete decision aids and fill out questionnaires |
| General exclusion criteria |
Current treatment for malignancy Expected lifespan < 12 months Pregnancy |
| Condition related exclusion criteria | |
| Inguinal hernia | Recurrent or complicated inguinal hernia (e.g. incarcerated hernia, strangulation, ileus) |
| Gallstones | Complicated gallstone disease (e.g. cholecystitis, choledocholithiasis, biliary pancreatitis) |
| Knee- or hip osteoarthritis |
Early-stage osteoarthritis Earlier arthroplasty |