Table 1.
Demographic and clinical data for general anesthetics at UWMC. Continuous variables are summarized by mean (sd). Categorical variables are summarised by n and %. Ordinal variables are summarized by median and interquartile range
| Variable | Cannabis Use | ||
|---|---|---|---|
| None | Current | Daily | |
| n (%) | 24,662 (90.0) | 1976 (7.2) | 750 (2.7) |
| Preoperative Data | |||
| Age in years [mean (sd)] | 53 (16) | 48 (15) | 50 (14) |
| ASA [n (%)] | |||
| 1 | 2577 (10.4) | 176 (8.9) | 19 (2.5) |
| 2 | 11,533 (46.8) | 925 (46.8) | 292 (38.9) |
| 3 | 10,532 (42.7) | 875 (44.3) | 439 (58.5) |
| Outpatient [n (%)] | 16,321 (65.6) | 1212 (61.3) | 438 (58.4) |
| Male Sex [n (%)] | 10,833 (44.3) | 1055 (53.4) | 390 (52.0) |
| Non-smoker [n (%)] | 22,571 (92.3) | 1526 (77.2) | 525 (70.0) |
| Prior PONV/Motion Sickness [n (%)] | 4604 (18.3) | 368 (18.6) | 191 (25.5) |
| Intraoperative Data | |||
| Procedure Duration (min) [mean (sd)] | 120 (94) | 126 (105) | 133 (110) |
| Exposed to Nitrous Oxide [n (%)] | 3152 (12.8) | 240 (12.1) | 111 (14.8) |
| Surgery Higher Risk for Nausea [n (%)] | 4425 (17.5) | 341 (17.3) | 146 (19.5) |
| Total Number of Prophylactic Agents (median, [IQR]) | 2 [2,3] | 2 [2,3] | 2 [1,2] |
| Postoperative Data | |||
| PACU Opioids [n (%)] | 12,969 (52.6) | 1184 (59.9) | 476 (63.5) |
| Apfel Score (median, [IQR]) | 2 [2,3] | 2 [1,3] | 2 [1,3] |
| Outcome | |||
| PONV Observed [n (%)] | 4255 (17.3) | 372 (18.8) | 164 (21.9) |