Readmissions and costs among younger and older adults for targeted conditions during the enactment of the hospital readmission reduction program

Lu, Chi-Hua; Clark, Collin M.; Tober, Ryan; Allen, Meghan; Gibson, Walter; Bednarczyk, Edward M.; Daly, Christopher J.; Jacobs, David M.

doi:10.1186/s12913-021-06399-z

Table 3 Interrupted Time Series Analysis Evaluating the Change in 30-day Readmission Rates Prior to and After Implementation of the Hospital Readmission Reduction Program Stratified by Targeted/Non-targeted Condition and Age Group

From: Readmissions and costs among younger and older adults for targeted conditions during the enactment of the hospital readmission reduction program

	HRRP Announcement Phase Trend^a (SE)	P	Level Change^b (SE)	P	Post-HRR Phase Trend^c	P	Difference in Trends^d (SE)	P
Acute Myocardial Infarction
All age groups	−0.0697 (0.008)	<.0001	−0.2564 (0.198)	0.20	−0.0341	<.0001	0.0356 (0.01)	< 0.001
18–39 years	−0.0157 (0.026)	0.54	−0.2452 (0.643)	0.70	−0.0337	0.17	−0.018 (0.035)	0.61
40–64 years	−0.0385 (0.005)	<.0001	−0.2882(0.135)	0.04	−0.0159	0.001	0.0226 (0.007)	0.001
≥ 65 years	− 0.0915 (0.01)	<.0001	− 0.3971 (0.268)	0.14	− 0.0433	<.0001	0.0482 (0.013)	0.006
Heart Failure
All age groups	− 0.0266 (0.009)	0.004	−1.0354 (0.225)	<.0001	−0.0126	0.14	0.014 (0.124)	0.26
18–39 years	0.0157 (0.037)	0.67	−1.3105 (0.961)	0.18	0.0196	0.58	0.0039 (0.048)	0.94
40–64 years	− 0.0209 (0.011)	0.07	− 0.6897 (0.293)	0.02	− 0.0024	0.82	0.0185 (0.015)	0.022
≥ 65 years	− 0.0275 (0.010)	0.008	−1.2214 (0.254)	<.0001	−0.017	0.06	0.0105 (0.014)	0.46
Pneumonia
All age groups	−0.0186 (0.006)	0.003	−0.5478 (0.14)	0.0003	−0.0196	< 0.001	−0.001 (0.009)	0.91
18–39 years	0.0011 (0.015)	0.94	0.1852 (0.383)	0.63	−0.0077	0.59	−0.0088 (0.019)	0.65
40–64 years	0.0104 (0.009)	0.26	−0.6752 (0.236)	0.006	0.0111	0.19	0.0008 (0.011)	0.95
≥ 65 years	−0.0339 (0.007)	<.0001	−0.5158 (0.171)	0.004	−0.0328	<.0001	0.0011 (0.008)	0.89
Chronic Obstructive Pulmonary Disease
All age groups	−0.0231 (0.013)	0.09	0.2827 (0.606)	0.64	−0.026	0.79	−0.0029 (0.095)	0.98
40–64 years	−0.0056 (0.015)	0.71	0.2427 (0.735)	0.74	0.0914	0.79	0.037 (0.115)	0.75
≥ 65 years	−0.0360 (0.012)	0.005	0.2882 (0.671)	0.67	−0.248	0.56	−0.0212 (0.103)	0.84
Non-targeted Conditions^e
All age groups	−0.0034 (0.002)	0.11	−0.2706 (0.049)	<.0001	0.0026	0.21	0.006 (0.003)	0.06
18–39 years	0.0071 (0.002)	0.002	−0.1247 (0.051)	0.02	−0.0031	0.15	−0.0102 (0.003)	0.002
40–64 years	0.0087 (0.006)	0.17	−0.1116 (0.107)	0.30	0.0124	0.05	0.0037 (0.01)	0.71
≥ 65 years	−0.0216 (0.003)	<.0001	−0.4268 (0.071)	<.0001	−0.0016	0.59	0.02 (0.004)	<.0001

Abbrev. HRRP Hospital Readmissions Reduction Program, SE standard error
^a The HRRP announcement phase trend represents the change in rates of readmissions per month before HRRP implementation. This was estimated by calculating the β₁ from the equation
^b The level change represents the level change immediately after HRRP implementation. This was estimated by calculating the β₂ from the equation
^c The post-HRRP phase trend represents the post-HRRP implementation slope. This was estimated by calculating the sum of β₁ and β₃ from the equation discussed in the methods section
^d The difference in trends represents the trend change after HRRP implementation compared to the trend before implementation. This was estimated by calculating the β₃ from the equation
^e The interrupted time series analysis was estimated by using the same HRRP implementation time and age restrictions as the acute myocardial infarction, heart failure and pneumoniia cohorts

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ISSN: 1472-6963

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