Times when outcomes were measured according to the times when patients experienced the outcomes
| Time patient experienced outcome | Time outcome was measured | n | % |
| Overall | 97 | 39.6 | |
| Immediately after procedure | 9 | 9.3 | |
| 0–1 hour after procedure | 4 | 4.1 | |
| >1–24 hours after procedure | 15 | 15.5 | |
| >24 hours after procedure | 4 | 4.1 | |
| In recovery/at discharge | 23 | 23.7 | |
| After procedure NOS | 16 | 16.5 | |
| Not stated/other | 26 | 26.8 | |
| Not stated | 105 | 42.9 | |
| Before procedure | 1 | 1.0 | |
| Immediately after procedure | 6 | 6.2 | |
| 0–1 hour after procedure | 8 | 8.2 | |
| >1–24 hours after procedure | 6 | 6.2 | |
| >24 hours after procedure | 1 | 1.0 | |
| In recovery/at discharge | 23 | 23.7 | |
| After procedure NOS | 18 | 18.6 | |
| Not stated | 42 | 43.3 |
Counts indicate the number of studies with at least one outcome with that time of experience−time of measurement combination. Percentages sum to more than 100 because of studies reporting multiple outcomes.
NOS, not otherwise specified.