Applicability of a previously validated readmission predictive index in medical patients in Singapore: a retrospective study

Table 1 The demographic, clinical characteristics of hospitalized patients with different risks of readmission

	LACE < 10, n=107495	LACE ≥ 10, n=20055	p^†
Age, mean year (SD)	52.82 (17.64)	66.46 (14.68)	<0.001	<0.001
Age group, %
<65 years	72.30	42.08	<0.001	<0.001
≥65 years	27.70	57.92	<0.001	<0.001
Male sex, %	52.52	48.30	<0.001	<0.001
Ethnicity, %
Chinese	71.20	73.93	<0.001	Reference
Malay	11.61	13.06		0.001
Indian	10.01	9.09		<0.001
Others	7.18	3.91		<0.001
Admission ward class, %
A	12.49	6.13	<0.001	Reference
B	62.49	56.81		<0.001
C	25.02	37.05		<0.001
Year of discharge, %
2006	28.00	35.63	<0.001	Reference
2007	22.02	22.26		<0.001
2008	17.40	15.93		<0.001
2009	16.54	13.46		<0.001
2010	16.14	12.73		<0.001
ICU admission, %	0.57	2.35	<0.001	<0.001
Charlson comorbidity index (SD)	0.35 (0.62)	1.64 (0.90)	<0.001	<0.001
No of ED visits in 6 months before the index hospitalization^*	1.10 (1.10, 1.10)	1.20 (1.20, 1.21)	<0.001	<0.001
Length of stay for index hospitalisation, day^*	1.91 (1.90, 1.92)	6.21(6.14, 6.29)	<0.001	<0.001

SD, standard deviation. ED, Emergency Department. ^*Geometric mean (95% confidence interval).
^†p value was calculated using Chi-Square test except p value for age was calculated using two sample t-test and length of stay using Mann–Whitney U test.

ISSN: 1472-6963