According to recent data from the Children’s Hospital Association’s Pediatric Health Information System (PHIS), the Children’s Heart Center at Lucile Packard Children's Hospital Stanford and Stanford Children’s Health has higher marks in key areas — including survival rates and average length of stay — compared with dozens of other children’s and young adult cardiac programs nationwide. What makes these outcomes even more noteworthy is the fact that the Heart Center also has the highest acuity Case Mix Index (CMI) in the country.*
Higher Survival Rates Than National Data Set
The Children's Heart Center’s survival rates were higher than the national data set for PHIS “peer hospitals”:
- In 2015, the Heart Center's observed-to-expected mortality ratio was 0.40 compared with an average ratio of 0.84 for PHIS peer hospitals. This index difference of 0.44 indicates patients had a 52 percent higher survival rate at Lucile Packard Children’s Hospital Stanford compared with the national PHIS data set.
- This is an even greater difference than reported the year before. In 2014, the Heart Center’s patients had a 24 percent higher survival rate compared with the PHIS national data set (observed-to-expected mortality ratio of 0.63 vs. an average ratio of 0.83 for PHIS peer hospitals, for an index difference of 0.20).
View the Observed to Expected Mortality Ratio for Cardiac Service Line chart
Surgical Survival Rates 61% Higher Than Peers
When looking specifically at cardiac surgical care, the Children's Heart Center's outcomes were even more impressive:
- In 2015, an observed-to-expected mortality ratio of 0.28 vs. an average ratio of 0.72 for PHIS peer hospitals — an index difference of 0.44 — means the Heart Center’s surgical patients had a 61 percent higher survival rate than the PHIS national data set.
- In 2014, an observed-to-expected mortality ratio of 0.29 vs. an average ratio of 0.66 for PHIS peer hospitals — an index difference of 0.37 — indicated the Heart Center’s surgical patients had a 56 percent greater chance of survival.
View the Observed to Expected Mortality Ratio for Cardiac Care - Surgical chart
Highest Complexity Cases in the Nation
Adding even more weight to these survival rates is the fact that Lucile Packard Children’s Hospital Stanford handles the highest acuity and complexity cardiac cases in the country:
- The Heart Center’s overall surgical CMI in 2015 was 13 percent higher than the PHIS peer hospital average (5.85 CMI for Stanford vs. 5.16 CMI for the PHIS national data set, when adjusted for severity).
- The Heart Center’s overall medical CMI in 2015 was 23 percent higher than the PHIS peer hospital average (1.30 CMI for Stanford vs. 1.06 CMI for the PHIS national data set, when adjusted for severity).
View the CMI: Cardiac Care - Surgical chart
View the CMI: Cardiac Care - Medical chart
Shorter average length of stay
Even while surpassing PHIS peer hospital averages for outcomes, the Heart Center’s average length of stay (ALOS) for surgical cases was lower than the PHIS national data sets:
- In 2015, patients who had surgery at Stanford spent an average of 3.51 fewer days in the hospital (6.85 days on average vs. the PHIS peer hospital average of 10.36 days).
View the Case Mix Adj ALOS for Cardiac Care - Surgical chart
Due to the Heart Center’s willingness to take on “last hope” cases, a focus on innovation and discovery is a critical part of the equation.
“We learn something new every time we push the limits of what should be achievable,” said Director Stephen Roth, MD, MPH.
* Data Source: Pediatric Health Information System (PHIS), 2013 and 2014. The PHIS hospitals are 46 of the largest and most advanced children's hospitals in America, and constitute the most demanding standards of pediatric service in America. The Children’s Hospital Association developed PHIS to provide a rich data source for clinicians to conduct comparative effectiveness studies that affect hospitalized children.