Table 1.

Top five ranked clinical order associations for pneumonia (ICD9: 486) (top) and altered mental status (ICD9: 780) (bottom) predicted by attending-only and teaching service trained models sorted by P-value calculated by Yates’ chi-squared statistic. Additional association statistics (e.g. baseline prevalence, PPV, RR) and a column denoting the presence or absence of the predicted item in the corresponding human-authored hospital order set or guideline reference standard are also included. Items with a baseline prevalence <1% are excluded to avoid statistically spurious results and ensure computationally tractable association rule episode mining. Each item represents a clinical order that a clinician can request through a CPOE system. An automated order set can be curated by selecting the top K ranked clinical orders.