Single Centre Analysis - Johns Hopkins Children's Center

Children needing specialty care often require interfacility medical transport, but

• 42% of children’s hospitals are within 20 miles of another state
• 1/3rd of the US population lives in a statistical region that borders or crosses into another state
• Over 95% of children’s hospitals have routine transport catchment areas that include regions outside of their home state
• Variable state EMS regulations can cause delays in transport as teams in one state work to comply with the laws of of state they are transporting to or from
• Paediatric transport data is not publicly available to inform public policy

• Johns Hopkins Children’s Center (JHCC) Transports from 7/2022-6/2023
  • Inclusion Criteria: all in-bound paediatric transports originating outside of Maryland. Any 3rd party transports whose referring and receiving facilities are in different states.
  • Exclusion Criteria: neonatal transports, outbound transports, transports originating and terminating in Maryland
  • Data aggregating/masking/geocoding
• Spatial Analysis
  • 150-mile buffer to simulate typical transport radius
  • Proximity analysis to MD state line and JHCC
  • Global Moran’s I (Spatial Autocorrelation)
  • Spatial Statistics

• n=118 transports
  • Urgent/emergent: 101 (86%)
  • Inside transport radius: 117 (99%)
  • Non-Marylanders: 88 (75%)
  • Ground transports : 100 (85%)
• Spatial Statistics
  • Mean distance to Maryland (SD) 20 (20.7) miles
  • Mean distance to JHCC (SD) 70 (35) miles
  • Global Moran’s I p-values: 0.449 to 0.973

• Transports are almost completely within typical transport radius
• ¼ of out-of-state transports are in-state residents returning home for care
• There is no statistically significant clustering or dispersion of interstate transports suggesting that these transports are truly random when considering level of care, diagnosis, mode of transport, and acuity