Table 3.

Baseline characteristics of the study population by 30-day readmission status

CharacteristicNot readmitted within 30 days, n=1,325Readmitted within 30 days, n=456p value
Age, mean (SD)63 (16.0)64 (15.5)0.144
Female, n (%)624 (47%)216 (47%)0.919
Length of stay, days, mean (SD)7.7 (7.1)8.4 (8.8)0.091
Hospital admissions in the last year, mean (SD)0.71 (0.8)1.61 (1.7)<0.001
Emergency department visits in last 6 months, mean (SD)0.39 (1.22)1.21 (3.0)<0.001
HOSPITAL score, mean (SD)3.86 (1.4)4.96 (1.8)<0.001
LACE index, mean (SD)11.31 (2.4)12.59 (3.72)<0.001
Charlson comorbidity score, mean (SD)4.88 (3.27)6 (3.78)<0.001
Number of discharge medications, mean (SD)10.33 (6.49)11.89 (6.53)<0.001
Medical comorbidities:
 myocardial infarction, n (%)344 (26%)150 (33%)0.004
 congestive heart failure, n (%)295 (22%)159 (35%)<0.001
 peripheral artery disease, n (%)118 (9%)45 (10%)0.539
 stroke, n (%)76 (6%)26 (6%)0.978
 dementia, n (%)40 (3%)9 (2%)0.239
 chronic lung disease, n (%)357 (27%)144 (32%)0.058
 connective tissue disease, n (%)28 (2%)7 (2%)0.443
 peptic ulcer disease, n (%)59 (5%)19 (4%)0.797
 cirrhosis, n (%)40 (3%)25 (6%)0.016
 diabetes without complications, n (%)272 (21%)127 (28%)0.001
 diabetes with complications, n (%)145 (11%)88 (19%)<0.001
 paralysis, n (%)44 (3%)24 (5%)0.062
 renal disease, n (%)243 (18%)142 (31%)<0.001
 cancer, n (%)97 (7%)42 (9%)0.194
 metastatic cancer, n (%)32 (2%)18 (4%)0.088
  • SD = standard deviation.