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Table 2 Bivariate Analyses of Segments versus Hospital Utilization Rates from Year 2013 to 2015

From: Predictive ability of an expert-defined population segmentation framework for healthcare utilization and mortality - a retrospective cohort study

Outcome Mostly Healthy Serious Acute Stable Chronic Complex Chronic without Frequent Hospital Admissions Complex Chronic with Frequent Hospital Admissions End of Life All p-value
Total no. of patient days 525,336,500 218,597,459 47,521,470 91,359,758 3,320,804 1,548,823 887,684,814  
Total ED visit (2013 to 2015)
 Grand Total 70,679 58,964 15,050 75,126 15,734 1726 237,279  
 No. per 1000 patient days 0.13 0.27 0.32 0.82 4.74 1.11 0.27  
 Mean (SD) 0.15 (0.62) 0.29 (0.99) 0.34 (1.34) 0.86 (2.25) 4.00 (7.29) 0.88 (1.67) 0.88 (1.22) < 0.001
 Visited ED (%) 44,065 (9.2%) 31,249 (15.6%) 7121 (16.3%) 28,105 (32.1%) 2808 (71.4%) 780 (39.6%) 114,128 (13.9%) < 0.001
Total SOC visit (2013 to 2015)
 Grand Total 2,670,226 1,417,950 411,584 1726,201 167,529 85,152 6,478,642  
 No. per 1000 patient days 5.08 6.49 8.66 18.89 50.45 54.98 7.30  
 Mean (SD) 5.54 (10.88) 7.06 (14.15) 9.41 (14.94) 19.70 (26.85) 42.57 (42.69) 43.18 (50.75) 7.90 (15.80) < 0.001
 Visited SOC (%) 273,616 (56.8%) 115,599 (57.5%) 32,183 (73.6%) 73,789 (84.2%) 3823 (97.2%) 1768 (89.7%) 500,778 (61.1%) < 0.001
Total Hospital Admissions (2013 to 2015)
 Grand Total 64,766 47,723 19,696 71,711 17,674 2620 224,190  
 No. per 1000 patient days 0.12 0.22 0.41 0.78 5.32 1.69 0.25  
 Mean (SD) 0.13 (0.54) 0.24 (0.84) 0.45 (1.09) 0.82 (1.90) 4.49 (6.32) 1.33 (2.10) 0.27 (1.06) < 0.001
 Admitted to Hospital (%) 43,025 (8.9%) 26,568 (13.2%) 11,350 (25.9%) 27,792 (31.7%) 3062 (77.8%) 985 (50.0%) 112,782 (13.8%) < 0.001
  1. Abbreviations: ED Emergency Department, SOC Specialist Outpatient Clinic. Numbers were presented as mean ± standard deviation or number (%) as appropriate
  2. a Chi-square for categorical variables and one-way ANOVA test for continuous variables