Table 1.

Association between Member and Hospitalization Characteristics and 30-Day Readmissions

Variable	Category	Total N	Percent Readmitted Within 30 Days	P value
Age at hospitalization (in years)	<18	831	5.4%	<0.001*
	18–34	3059	6.6%
	35–49	6295	7.9%
	50–64	12,622	9.0%
	65+	7465	11.3%
Sex	Female	16,236	8.0%	<0.001**
	Male	14,036	10.1%
Initial hospitalization length of stay (in days)	1	6967	6.7%	<0.001*
	2	6911	6.9%
	3	5954	8.0%
	4	3868	8.5%
	5+	6572	14.8%

^*P values determined using the Cochran–Armitage test for trend.

^**P value determined using Fisher's exact test.