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Table 1 Summary Statistics – Demographics, SES Proxies, Resource Utilizations, and Diagnosis

From: HealtheDataLab – a cloud computing solution for data science and advanced analytics in healthcare with application to predicting multi-center pediatric readmissions

VariablesLevelNot ReadmittedReadmitted
n (%) or mean (sd)n (%) or mean (sd)
GenderMale311,260 (50.60)45,338 (51.09)
Female273,009 (44.38)39,194 (44.17)
Unknown30,861 (5.02)4205 (4.74)
Race/ethnicityWhite304,559 (49.51)36,807 (41.48)
Asian9205 (1.50)1163 (1.31)
Black/African American144,376 (23.47)14,833 (16.72)
Native American6537 (1.06)688 (0.78)
Hispanic19,201 (3.12)2120 (2.39)
Others/Unknown131,252 (21.34)33,126 (37.33)
Age5.73 (6.00)6.90 (5.95)
Admission typeEmergency276,802 (45.00)27,986 (31.54)
Elective97,886 (15.91)18,569 (20.93)
Urgent120,468 (19.58)15,880 (17.90)
Trauma1521 (0.25)51 (0.06)
Others118,453 (19.26)26,251 (29.58)
Admission sourceReferral247,863 (40.29)36,602 (41.25)
Emergency/ER105,515 (17.15)9585 (10.80)
Transfer134,410 (21.85)10,618 (11.97)
Others127,342 (20.70)31,932 (35.98)
Length of stay<  2 days154,703 (25.15)12,198 (13.75)
<  4 days268,635 (43.67)24,353 (27.44)
<  7 days101,594 (16.52)16,549 (18.65)
7 days or more90,198 (14.66)35,637 (40.16)
Previous visits0506,358 (82.32)31,389 (35.37)
172,659 (11.81)15,502 (17.47)
218,949 (3.08)8895 (10.02)
3 or more17,164 (2.79)32,951 (37.13)
Previous maximum length of stay<  2 days524,932 (85.34)36,463 (41.09)
<  4 days34,051 (5.54)7349 (8.28)
<  7 days21,348 (3.47)9670 (10.9)
7 or more34,799 (5.66)35,255 (39.73)
Previous ED0478,460 (77.78)62,745 (70.71)
188,412 (14.37)13,094 (14.76)
227,999 (4.55)5347 (6.03)
3 or more20,259 (3.29)7551 (8.51)
Index visit is a readmissionYes52,355 (8.51)43,633 (49.17)
No562,775 (91.49)45,104 (50.83)
Readmission history0587,646 (95.53)50,463 (56.87)
114,808 (2.41)8518 (9.60)
25127 (0.83)5456 (6.15)
3 or more7549 (1.23)24,300 (27.38)
Diagnosis - ICD 10
 Bacterial infections0.05 (0.27)0.07 (0.39)
 Blood and blood organs0.11 (0.50)0.25 (0.77)
 Central Nervous System0.20 (0.76)0.25 (0.86)
 Cerebrovascular blood vessels0.05 (0.47)0.06 (0.52)
 Conditions from perinatal period0.44 (1.98)0.22 (1.52)
 Congenital and chromosomal0.31 (1.28)0.36 (1.55)
 Digestive0.33 (1.23)0.43 (1.40)
 Ear, mastoid process0.05 (0.35)0.03 (0.29)
 Endocrine0.08 (0.56)0.08 (0.58)
 External causes of morbidity0.10 (0.52)0.07 (0.39)
 Eye and adnexa0.08 (0.80)0.08 (0.77)
 Genitourinary0.15 (0.68)0.15 (0.64)
 Hypersensitivity0.02 (0.19)0.04 (0.28)
 Immune mechanisms0.01 (0.13)0.02 (0.22)
 Injury and poison0.61 (8.44)0.39 (5.45)
 Ischemic heart disease0.00 (0.04)0.00 (0.04)
 Malnutrition0.01 (0.13)0.02 (0.16)
 Mental, behavioral, neurodevelopmental0.26 (1.49)0.22 (1.08)
 Metabolic and other endocrine process0.18 (0.67)0.24 (0.92)
 Musculoskeletal and connective tissues0.12 (0.62)0.12 (0.61)
 Neoplasms0.05 (0.32)0.34 (0.87)
 Other heart diseases0.04 (0.38)0.06 (0.47)
 Overweight and hyperalimentation0.01 (0.12)0.01 (0.12)
 Pregnancy, childbirth, puerperium0.08 (1.02)0.04 (0.74)
 Pulmonary heart disease0.03 (0.38)0.04 (0.49)
 Respiratory0.48 (1.14)0.35 (1.05)
 Rheumatic fever1.67 (0.02)1.47 (0.01)
 Rheumatic heart disease0.00 (0.08)0.00 (0.10)
 Skin, subcutaneous tissues0.14 (0.66)0.11 (0.58)
 Symptoms, signs, and abnormal lab findings0.82 (1.71)0.91 (1.94)
 Viral infections0.16 (0.79)0.16 (0.80)
 Health Hazards due to family/personal history0.24 (0.79)0.34 (0.98)
 Health Hazards - others0.26 (0.75)0.21 (0.57)