. Author manuscript; available in PMC: 2016 Oct 1.

Published in final edited form as: JACC Heart Fail. 2015 Sep 9;3(10):765–773. doi: 10.1016/j.jchf.2015.06.007

Table 4.

Follow-up and 30-day readmission rates in collaborating, non-participating, and matched non-participating hospitals

Rates	CH		NPH		Matched NPH
Rates	Pre-intervention	Intervention	Pre-intervention	Intervention	Pre-intervention	Intervention
*Post-discharge follow-up*
7-day follow-up^†	31.1%	34.4%^***	30.2%	32.6%^***	31.5%	33.8%^***
14-day follow-up^†	47.2%	50%^***	46.3%	47.9%^***	47.3%	48.7%^**
*Overall 30-day readmission*
Unadjusted 30-day readmission^†	29.0%	27.3%^***	26.4%	25.8%^**	29.8%	28.9%^**
Mean 30-day RSRR^§	31.1%	28.5%^***	26.7%	26.1%^*	31.0%	29.9%
Weighted 30-day RSRR^†	30.7%	28.2%	28.5%	27.4%	31.1%	29.9%
*Readmission by follow-up status*
Mean RSRR, with 7-day follow-up^§	31.1%	28.5%	26.7%	26.1%	31.0%	29.9%
Mean RSRR, no 7-day follow-up^§	31.1%	28.5%	27.0%	26.0%	31.0%	29.9%
Mean RSRR, with 14-day follow-up^§	31.1%	28.5%	26.7%	26.1%	31.0%	29.9%
Mean RSRR, no 14-day follow-up^§	31.1%	28%	27.0%	26.0%	31.0%	29.9%
*Inter-group comparison*
Pre-post Δ mean RSRR^¥	0.0259		0.0065^*		0.0112^*
Pre-post Δ mean RSRR, with 7-day follow-up^¥	0.026		0.0064^*		0.0111^*

Abbreviations: CH, collaborating hospitals; NPH, non-participating hospitals; RSRR, risk-standardized readmission rate

Note:

p < .05

^**

p< .01

^***

p < .001

Pre-post comparison

^†

for χ2

^§

for 2-sample t-test

inter-group comparison:

^¥

for 2-sample t-test comparison with CH group