Table 1. Clustering of ED-30 day high risk patients in the prospective cohort.
| Characteristics | Cluster | |||||
| 1 | 2 | 3 | 4 | 5 | 6 | |
| Utilities | ||||||
| Number of Encounters | 842 | 773 | 641 | 387 | 376 | 365 |
| Average total lab test counts | 351.08 | 502.33 | 308.29 | 607.38 | 1143.30 | 542.09 |
| Average total Radiology counts | 8.23 | 15.60 | 8.21 | 9.87 | 56.45 | 21.31 |
| Average future 30-day ED counts | 1.41 | 2.16 | 2.23 | 2.48 | 1.86 | 2.13 |
| Average future 30-day cost ($) | 3641.77 | 5454.20 | 5046.48 | 5405.67 | 8244.95 | 4751.95 |
| Total future 30-day cost ($) per cluster ×106 | 3.07 | 4.22 | 3.24 | 2.09 | 3.10 | 1.74 |
| Demographics | ||||||
| Sex (Female) | 64.37 | 29.88 | 20.28 | 89.66 | 38.30 | 81.10 |
| Age new born | 0.00 | 0.00 | 0.31 | 0.26 | 0.00 | 0.00 |
| Age 1–5 | 0.24 | 0.13 | 1.87 | 0.00 | 0.00 | 0.00 |
| Age 5–12 | 0.12 | 0.00 | 0.47 | 0.00 | 0.00 | 0.00 |
| Age 12–18 | 0.36 | 0.00 | 3.90 | 1.03 | 0.00 | 0.27 |
| Age 18–35 | 93.71 | 1.55 | 20.59 | 98.45 | 0.00 | 15.89 |
| Age 35–50 | 2.49 | 59.12 | 49.61 | 0.26 | 38.56 | 41.37 |
| Age 50–65 | 0.36 | 30.53 | 19.34 | 0.00 | 48.40 | 36.44 |
| Age>65 | 2.73 | 8.67 | 3.90 | 0.00 | 13.03 | 6.03 |
| Chronic disease DX | ||||||
| Total chronic disease DX | 2.05 | 4.90 | 0.56 | 6.33 | 15.36 | 9.50 |
| Percentage of encounters without chronic diseases | 13.90 | 0.00 | 70.98 | 0.00 | 0.00 | 0.00 |
| Other nervous system disorders | 21.97 | 47.09 | 0.00 | 56.33 | 88.03 | 75.34 |
| Essential hypertension | 8.31 | 55.11 | 0.78 | 14.73 | 90.69 | 48.77 |
| Esophageal disorders | 10.69 | 11.38 | 0.78 | 58.14 | 82.18 | 73.42 |
| Asthma | 16.15 | 12.55 | 0.94 | 74.42 | 49.20 | 58.36 |
| Other nutritional; endocrine; and metabolic disorders | 4.51 | 12.55 | 0.00 | 41.60 | 61.97 | 61.64 |
| Disorders of lipid metabolism | 1.19 | 19.79 | 0.00 | 7.24 | 84.57 | 33.15 |
| Diabetes mellitus without complication | 1.19 | 20.57 | 2.18 | 15.50 | 61.70 | 39.18 |
| Chronic obstructive pulmonary disease and bronchiectasis | 0.12 | 26.78 | 0.16 | 2.33 | 66.22 | 32.60 |
| Headache; including migraine | 9.74 | 5.56 | 1.72 | 27.39 | 8.78 | 33.15 |
| Epilepsy; convulsions | 4.39 | 11.90 | 2.96 | 21.96 | 21.28 | 18.63 |
| Diabetes mellitus with complications | 1.07 | 10.61 | 0.62 | 2.58 | 57.18 | 15.07 |
| Thyroid disorders | 4.16 | 5.05 | 1.56 | 16.54 | 31.65 | 20.82 |
| Spondylosis; intervertebral disc disorders; other back problems | 3.92 | 9.44 | 0.31 | 9.30 | 30.32 | 18.08 |
| Cardiac dysrhythmias | 3.09 | 10.09 | 0.78 | 10.59 | 31.38 | 13.15 |
| Chronic disease DX | ||||||
| Coronary atherosclerosis and other heart disease | 0.00 | 10.22 | 0.94 | 0.78 | 49.73 | 10.68 |
| Menstrual disorders | 10.57 | 2.33 | 1.40 | 26.36 | 2.13 | 19.18 |
| Residual codes; unclassified | 0.83 | 3.10 | 0.00 | 13.44 | 26.33 | 19.18 |
| Osteoarthritis | 0.24 | 6.21 | 0.31 | 2.33 | 33.24 | 14.79 |
| Screening and history of mental health and substance abuse codes | 5.46 | 8.15 | 0.94 | 1.81 | 20.74 | 9.86 |
Characteristics of utilities, demographics and chronic disease conditions were summarized for each cluster. All the data shown within the headers of demographics and chronic disease diagnosis were expressed in percentages (%).