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 4 DD Estimate of Change in 30-day Readmission Rates Prior to and After Implementation of the Hospital Readmission Reduction Program Between Targeted and Non-targeted Conditions Stratified by Age Groups Using Interrupted Time Series Analysis

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-HRRP Phase Trend^c	P	Difference in Trends^d (SE)	P
Acute Myocardial Infarction
All age groups	−0.0638 (0.008)	<.0001	0.0042 (0.201)	0.98	−0.0373	<.0001	0.0265 (0.01)	0.01
18–39 years	−0.0228 (0.025)	0.37	−0.0998 (0.635)	0.88	−0.0318	0.19	−0.009 (0.034)	0.8
40–64 years	−0.0491 (0.006)	<.0001	−0.0352 (0.158)	0.82	−0.0332	<.0001	0.0159 (0.008)	0.05
≥ 65 years	−0.0676 (0.014)	<.0001	0.1147 (0.338)	0.74	−0.0454	0.001	0.0222 (0.021)	0.29
Heart Failure
All age groups	−0.0248 (0.008)	0.003	−0.6847 (0.203)	0.001	−0.0997	0.02	0.0068 (0.011)	0.54
18–39 years	0.0087 (0.037)	0.81	−1.2183 (0.953)	0.21	0.0243	0.49	0.0156 (0.048)	0.74
40–64 years	−0.0353 (0.012)	0.003	−0.3339 (0.298)	0.27	−0.0216	0.05	0.0137 (0.015)	0.36
≥ 65 years	−0.0093 (0.009)	0.3	−0.6902 (0.224)	0.003	−0.019	0.03	−0.0097 (0.012)	0.43
Pneumonia
All age groups	−0.0152 (0.006)	0.02	−0.2795 (0.141)	0.05	−0.0222	< 0.001	−0.007 (0.009)	0.43
18–39 years	−0.0061 (0.014)	0.67	0.2977 (0.371)	0.43	−0.004	0.77	0.0021 (0.019)	0.91
40–64 years	0.001 (0.011)	0.92	−0.4609 (0.273)	0.96	−0.0044	0.66	−0.0054 (0.014)	0.69
≥ 65 years	−0.0128 (0.006)	0.05	−0.051 (0.164)	0.76	−0.033	<.0001	−0.0202 (0.008)	0.002
Chronic Obstructive Pulmonary Disease^e
All age groups	−0.0168 (0.008)	0.04	0.2957 (0.497)	0.55	−0.028	0.71	−0.0112 (0.076)	0.88
40–64 years	−0.0136 (0.01)	0.19	0.1706 (0.613)	0.78	0.0247	0.8	0.0383 (0.094)	0.68
≥ 65 years	−0.0182 (0.007)	0.008	0.4385 (0.54)	0.42	−0.0723	0.37	−0.0541 (0.081)	0.51

Abbrev. DD difference-in-difference, 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 discussed in the methods section
^b The level change represents the level change immediately after HRRP implementation. This was estimated by calculating the β₂ from the equation discussed in the methods section
^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 discussed in the methods section
^e DD analysis was estimated by using the same HRRP implementation time and age restrictions as the Chronic Obstructive Pulmonary Disease cohort

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ISSN: 1472-6963

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