Table 2.
Odds ratios (exponentiated coefficients from Bayesian Bernoulli model) with 95% credible intervals. Probability of THC (predicted from separate BART model) modeled directly as propensity score
| Model Parameter | Odds Ratio for any PONV | 95%CI |
|---|---|---|
| Age < 50 years | 1.37 | 1.29–1.46 |
| ASA 1 (Reference) | 1 | – |
| ASA 2 | 1.02 | 0.92–1.13 |
| ASA 3 | 0.93 | 0.83–1.05 |
| No Use of Cannabis (Referent) | 1 | – |
| Current Use of Cannabis (Compared to No Use) | 1.07 | 0.96–1.18 |
| Daily Use of Cannabis (Compared to No Use) | 1.16 | 0.99–1.35 |
| Exposed to Nitrous Oxide | 1.12 | 1.03–1.21 |
| Exposed to Potent Volatile Agent | 1.81 | 1.70–1.95 |
| Surgical Duration (minutes, log transformed) | 1.43 | 1.37–1.50 |
| Female Sex | 1.95 | 1.84–2.07 |
| History of PONV or Motion Sickness | 1.49 | 1.39–1.59 |
| Non-smoker | 1.67 | 1.41–1.92 |
| Opioids in PACU | 1.55 | 1.47–1.65 |
| Per 1% Increase in Probability of THC Use (Propensity Score) | 1.06 | 1.04–1.08 |
| Per Prophylactic PONV Drug Given | 0.87 | 0.84–0.89 |