Predicting 30-Day Readmissions: Performance of the LACE Index Compared with a Regression Model among General Medicine Patients in Singapore

Table 2

Patient characteristics and their association with readmission within 30 days.

	All patients ()	Readmitted patients ()	Nonreadmitted patients ()	value
Age, mean (SD)	60.0 (19.5)	66.6 (17.0)	59.3 (19.6)	<0.001
Male (%)	2621 (44.7%)	264 (46.2%)	2357 (44.6%)	0.479
Length of stay, median (IQR)	3 (2–5)	4 (2–8)	3 (2–5)	<0.001
Urgent admission (%)	5827 (99.4%)	568 (99.3%)	5259 (99.4%)	0.772
Charlson comorbidity index score, mean (SD)	0.256 (0.615)	0.385 (0.755)	0.242 (0.597)	<0.001
LACE score, median (IQR)	6 (5–8)	7 (6–8)	6 (5–8)	<0.001
ED visits in previous 6 months, mean (SD)	0.132 (0.438)	0.154 (0.415)	0.129 (0.440)	0.033
Admission ward class B2/C (%)	4799 (81.9%)	495 (86.5%)	4304 (81.4%)	0.002
Number of surgical procedures, mean (SD)	0.170 (0.573)	0.308 (0.828)	0.155 (0.536)	<0.001
Number of dispensed medications at discharge, mean (SD)	8.753 (7.995)	10.920 (8.075)	8.519 (7.952)	<0.001
Congestive cardiac failure (%)	185 (3.2%)	33 (5.8%)	152 (2.9%)	0.001
Cerebrovascular disease (%)	34 (0.6%)	1 (0.2%)	33 (0.6%)	0.250
Chronic obstructive pulmonary disease (%)	47 (0.8%)	6 (1.0%)	41 (0.8%)	0.457
Any malignancy (%)	8 (0.1%)	5 (0.9%)	3 (0.1%)	<0.001

SD: standard deviation; IQR, interquartile range; ED: emergency department.