Table 4. Hospitalization and readmissions among age groups for HF, AMI, and pneumonia.

Category	Age Group (Years)				Trend p-Valuea
	18–39	40–54	55–64	≥65
Heart failure
Hospitalizations (n)	4997	23500	29622	148022
Readmissions (n)	1165	5506	6911	32511
Readmission rate (%, [95%CI])	23.3% [22.1–24.5]	23.4% [22.9–24.0]	23.3% [22.8–23.8]	22.0% [21.8–22.2]	<0.001
Myocardial infarction
Hospitalizations (n)	1979	17895	22672	64710
Readmissions (n)	184	1880	2712	11341
Readmission rate (%, [95%CI])	9.3% [8.0–10.6]	10.5% [10.1–11.0]	12.0% [11.5–12.4]	17.5% [17.2–17.8]	<0.001
Pneumonia
Hospitalizations (n)	12288	26997	27764	132571
Readmissions (n)	1295	3854	4482	22915
Readmission rate (%, [95% CI])	10.5% [10.0–11.1]	14.3% [13.9–14.7]	16.1% [15.7–16.6]	17.3% [17.1–17.5]	<0.001

^a p-Value for trend (increase or decrease) across consecutive age groups (18–39, 40–54, 55–64, ≥65 years).