Outcome types, scales and assessors
| Outcome characteristic | n | % |
| Outcome type | ||
| Acceptability | 2 | 0.8 |
| Anxiety | 49 | 20.0 |
| Anxiety | 20 | 8.2 |
| Anxiety difference | 1 | 0.4 |
| STAI | 19 | 7.8 |
| STAI difference | 9 | 3.7 |
| Comfort/discomfort | 58 | 23.7 |
| Comfort | 20 | 8.2 |
| Gloucester Comfort Score | 4 | 1.6 |
| Discomfort | 31 | 12.7 |
| Maximum discomfort | 3 | 1.2 |
| Distension | 36 | 14.7 |
| Distension | 33 | 13.5 |
| Distension difference | 3 | 1.2 |
| Experience | 4 | 1.6 |
| Satisfaction | 69 | 28.2 |
| Satisfaction | 66 | 26.9 |
| GHAA9 satisfaction | 3 | 1.2 |
| NAPCOMS | 5 | 2.0 |
| Nausea | 7 | 2.9 |
| Nausea | 6 | 2.4 |
| Nausea difference | 1 | 0.4 |
| Pain | 201 | 82.0 |
| Pain | 174 | 71.0 |
| Pain difference | 7 | 2.9 |
| Maximum pain | 20 | 8.2 |
| Tolerance | 6 | 2.4 |
| Willingness to repeat | 60 | 24.5 |
| Other | 35 | 14.3 |
| Outcome scale | ||
| Binary | 84 | 34.3 |
| Faces | 3 | 1.2 |
| Likert | 16 | 6.5 |
| Numerical Rating Scale | 21 | 8.6 |
| Visual Analogue Scale | 115 | 46.9 |
| Verbal scale | 4 | 1.6 |
| Not stated | 46 | 18.8 |
| Other | 85 | 34.7 |
| Assessor description | ||
| Patient | 207 | 84.5 |
| Nurse | 14 | 5.7 |
| Endoscopist | 6 | 2.4 |
| Research staff | 1 | 0.4 |
| Not stated | 56 | 22.9 |
Percentages for outcome-related characteristics may sum to greater than 100 because some studies report multiple outcomes.
STAI, State-Trait Anxiety Inventory (state component); GHAA9, Group Health Association of America-9; NAPCOMS, Nurse-Assessed Patient Comfort Score.