Table 5. Comparing the Prevalence of Complications Between the Two Intervention Groups and Placebo (Placebo Is the Reference Group).
| Groups | Placebo (N = 65), No (%) | Meperidine, (N = 65) | Fentanyl, (N = 65) | P value | ||
|---|---|---|---|---|---|---|
| No. (%) | ARR a % (CI 95%) | No. (%) | ARR % (CI 95%) | |||
| Hypotension | 35 (53.8) | 41 (63.1) | -9.3 (-26, 7) | 35 (53.8) | -9.3 (-26, 7) | 0.471 |
| Nausea | 22 (33.8) | 18 (27.7) | 6.1 (-9, 21) | 20 (30.8) | 3.3 (-13, 19) | 0.749 |
| Vomiting | 9 (13.8) | 6 (9.2) | 4 (-6, 15) | 11 (16.9) | -3.1 (-15, 9) | 0.43 |
| Sedation | 0 (0) | 2 (3.1) | -2 (-7, 1) | 6 (9.2) | -9 (-16, -2) | 0.026 |
| Pruritus | 2 (3.1) | 0 (0) | -2 (-10, 4) | 4 (6.2) | -9.3 (-26, 7) | 0.127 |
| Respiratory Depression | 0 (0) | 0 (0) | -9.3 (-26, 7) | 1 (1.5) | -1.5 (-4.5, 1.5) | 0.366 |
a Abbreviations: ARR, absolute risk reduction.