Table 1 Cost and utilization patterns of high utilizer (HU) groups
|  | Total (N = 388,162) | Non-HU (N = 322,905) | Cost (N = 14,647) | LOS (N = 217) | SOC (N = 26,179) | LOS-SOC (N = 44) | Cost-LOS (N = 6008) | Cost-SOC (N = 12,892) | Cost-LOS-SOC (N = 5270) |
|---|---|---|---|---|---|---|---|---|---|
Population size | 100% | 83.2% | 3.8% | 0.1% | 6.7% | 0.1% | 1.5% | 3.3% | 1.4% |
% of total cost incurred | 100% | 25.1% | 15.8% | 0.1% | 7.8% | 0.0% | 15.6% | 16.9% | 18.6% |
 Gross amount (S$), median (IQR) | 824 | 525 | 16,591 | 9073 | 5234 | 8991 | 31,762 | 19,263 | 49,248 |
(281-3344) | (256-1642) | (13,380-22,119) | (7901-10,013) | (2956-7554) | (7856-9982) | (20,876-52,854) | (14,015-28,203) | (33,145-74,628) | |
 Inpatient admissions, median (IQR) | 0 (0–1) | 0 (0–0) | 1 (1–1) | 1 (1–2) | 0 (0–1) | 1 (1–2) | 2 (1–3) | 1 (1–2) | 3 (2–4) |
 LOS, median (IQR) | 0 (0–1) | 0 (0–0) | 7 (4–11) | 19 (17–22) | 0 (0–3) | 20 (18–21) | 27 (20–40) | 6 (2–10) | 29 (21–44) |
 SOC visits, median (IQR) | 1 (0–3) | 1 (0–2) | 3 (1–5) | 1 (0–3) | 9 (8–12) | 9 (8–10) | 2 (0–4) | 12 (8–18) | 13 (9–19) |
 ED attendances, median (IQR) | 1 (0–1) | 1 (1–1) | 1 (0–1) | 1 (1–2) | 0 (0–1) | 1 (1–2) | 1 (1–3) | 0 (0–1) | 2 (1–3) |