| Characteristics | Treatment group | p-value | |
| Codeine | Oxycodone | ||
| Age, mean ± SD (years) | 52.56 (±11.07) | 45.53 (±11.82) | 0.06 |
| Gender, Female (%) | 14 (70.0%) | 10 (50.0%) | 0.197 |
| Weight, mean ± SD (kg) | 62.20 (±14.96) | 63.28 (±12.16) | 0.804 |
| ASA, n (%) 1 2 3 |
1 (5.0%) 13 (65.0%) 6 (30.0%) |
0 (0.0%) 14 (70.0%) 6 (30.0%) |
|
| Pain present, n (%) | 5 (25.0%) | 2 (10.0%) | 0.407 |
| Operative Site (%) Frontal Occipital Temporoparietal |
7 (35.0%) 3 (15.0%) 10 (50.0%) |
5 (26.32%) 3 (15.79%) 11 (57.89%) |
|
| Mode Of Anaesthesia (%) TIVA Volatile Agent |
6 (30.0%) 14 (70.0%) |
8 (40.0%) 12 (60.0%) | 0.507 |
| LA by Surgeon (%) | 20 (100.0%) | 19 (95.0%) | 1.000 |
| Total Fentanyl Used, mean ± SD (mcg) | 133.75 (±60.30) | 135.00 (±57.01) | 0.947 |
| Total Remifentanil Used, Median (IQR) (mcg) | 805 (659 - 1507.5) | 787 (600 - 1342.5) | 0.892 |
| Operative Duration, mean ± SD (min) | 254.00 (±86.09) | 287.75 (±95.60) | 0.248 |