Table 3: Poisson regression model.

Model to estimate adjusted risk ratios for predicting high opioid use operationalized as more than 75mg OME (oral morphine equivalents), equivalent to 10 oxycodone 5mg tablets. The 95% Likelihood Ratio confidence limits are reported. Significant variables are in bold. In a repeat-analysis including only patients that completed all four surveys, age was only a trend and no-longer a significant co-variate (p=0.0632).

Characteristic	Relative Risk Estimate	95% confidence limits		p-value
24h prior to discharge opioid intake (OME/7.5)	1.0547	1.0358	1.0740	<0.0001
Age (in decades)	0.9168	0.8405	0.9999	0.0477
Pre-operative opioid prescription (Y/N)	1.1267	0.8793	1.4438	0.3585
24h prior-to-discharge pregabalin or gabapentin taken	1.308	0.433	3.956	0.1974