Inclusion/Exclusion Criteria for Preliminary Screening and Full-text Screening
| Screening criteria |
|---|
| Inclusion criteria for preliminary (abstract and title) screening |
| 1) Gastrointestinal-related |
| 2) Developed or validated PROM or questionnaire or survey or scale |
| Exclusion criteria for full-text screening |
| 1) PROM did not measure constipation symptoms or constipation-related QoL |
| 2) Revalidated an existing questionnaire for a different language or patient population |
| 3) Review papers or conference abstracts |
| 4) PROM examined constipation as subset or question |
| 5) Paediatric-related PROM |
| 6) Not in English |
PROM, patient-reported outcome measures; QoL, quality of life.