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Table 4 Time outcomes between propensity score-matched groups

From: Outcomes after helicopter versus ground emergency medical services for major trauma--propensity score and instrumental variable analyses: a retrospective nationwide cohort study

  Matched groups
  HEMS (IQR) GEMS (IQR) P Value
Dispatch to ED arrival, minutes, median* 60.0 (48-74) 35.0 (27-46) <.001
ED to blood transfusion, minutes ≤60, median** 26.0 (12-44) 36.0 (20-50) <.001
ED to definitive care, minutes ≤90, median*** 58.0 (42-74) 60.0 (34-75) .73
  1. Definitive care indicates surgery or transarterial embolization
  2. *HEMS; n = 3746, GEMS; n = 3720
  3. **HEMS; n = 335, GEMS; n = 195
  4. ***HEMS; n = 278, GEMS; n = 263
  5. HEMS helicopter emergency medical services, GEMS ground emergency medical service, ED emergency department, IQR interquartile range