National Rates over Time

Measurement Period: January 2006 - September 2018

Examining monthly national admission counts, mortality rates, readmission and observation rates provides information about the current quality of health care. Users can explore monthly results for acute myocardial infarction (AMI), heart failure, and pneumonia cohorts starting from January 2006 through two months ago. This data visualization allows users to explore the national trends in monthly outcome rates, but also allows closer examination of customized timeframes.

To begin exploring the data:

  1. Adjust the timeframe.

  2. Add a condition (AMI is selected by default).

  3. Check the boxes above graph to add 'Readmission' and/or 'Observation Stay Rate' to the display of national admission counts.

  4. Select 'Events' to view important measure milestones

Add a condition

Add a Condition(s):

Admissions icon Projections icon icon

{{condition.label}}

{{chartOptions.compare === "readmissionObservataion" ? "Readmission & Observation Stay Rate (%)" : "Mortality Rate (%)" }}
Number of Index Admissions (per month)

Table View

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EmptyMonthly Admission Total (N)Monthly Readmission Rate (%)Monthly Observation Stay Rate (%)
{{date.label}} {{condition[selectedDataKey][dateIndex]['admissionsRate']}} ± {{condition[selectedDataKey][dateIndex]['admissionsPlusMinus']}} {{condition[selectedDataKey][dateIndex]['readmissionRate'].toFixed(1)}} ± {{condition[selectedDataKey][dateIndex]['readmissionPlusMinus']}} {{condition[selectedDataKey][dateIndex]['observationRate'].toFixed(1)}} ± {{condition[selectedDataKey][dateIndex]['observationPlusMinus']}}

How are Outcomes Predicted?

Predicting Outcomes for the Most Recent Months

Only the most recent six months of admission counts, observation stay rate and readmission rate need to be estimated using a predictive model because:

  • Claims from the most recent six months are considered preliminary. 
  • Claims older than six months are final action claims.

The time-series models (based on autoregressive integrated moving average [ARIMA]) estimates the values for the most recent six months using historical data. As time passes and more claims are finalized the projections require less historical data.

For Number of Admissions:
  • The lighter grey bar represents the number of admissions based off the preliminary claims.
  • The dark grey bar represents the range for which the number of admissions based on the final action claims will fall (with 95% certainty).

For Readmission Rate:
  • The dark orange line represents the readmission rate based off the preliminary claims.
  • The light orange projection area represents the range for which the readmission rate based on the final action claims will fall (with 95% certainty).

For Observation Stay Rate:
  • The teal line represents the observation stay rate based off the preliminary claims.
  • The light teal projection area represents the range for which the observation stay rate based on the final action claims will fall (with 95% certainty).

Notes

For the publicly reported results by hospital, please visit Hospital Compare.

MEASUREMENT PERIOD

The measure cohorts included in this visualization have the following measurement period:

January 2006 – September 2018

DATA NOTES

Data for this visualization is obtained from the Integrated Data Repository (IDR)

DEFINITIONS

Table 2. Key definitions

Histogram

A graphical representation of the distribution of numerical data. Please see “Figure Explanations” in Related Research for more information.

Admission Counts

Number of hospitalizations for a given condition during the specified timeframe

Observation stay rate

Observation stay rate is calculated by:

(# hospitalizations with an observation stay)/(all hospitalizations)

where the observation stay happens after the index admission

Readmission rate

The readmission rate is calculated by:

(# hospitalizations with a readmission)/(all hospitalizations)

Mortality rate

The mortality rate is calculated by:

(# hospitalizations with a mortality)/(all hospitalizations)

Methodology Sources

AMI, Heart Failure, Pneumonia, COPD, and Stroke Readmission Measures Methodology: Jaymie Simoes, Jacqueline N. Grady, Jo DeBuhr, et al. 2018 Condition-Specific Measures Updates and Specifications Report Hospital-Level 30-Day Risk-Standardized Readmission Measures: Acute Myocardial Infarction – Version 10.0 Chronic Obstructive Pulmonary Disease – Version 6.0 Heart Failure – Version 10.0 Pneumonia – Version 10.0 Stroke – Version 6.0. https://www.qualitynet.org/dcs/ContentServer?c=Page&pagename=QnetPublic%2FPage%2FQnetTier4&cid=1219069855841. Available as of April 4, 2018.

 

Related Analyses

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