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Table 12 Distribution of each variable

From: The effect of the development of an emergency transfer system on the travel time to tertiary care centres in Japan

Variables Mean Median SD
Populationa 2716744.68 1769000.00 2571553.95
Average travel time (minutes) 57.76 55.52 20.42
Pavement ratio (%)b 28.13 25.60 12.34
Size(km2)c 7739.15 5761.00 11701.22
Kilometres of general roadb 23913.19 19448.00 14270.90
Kilometres of express roadb 153.15 133.00 100.63
Mountain area(km2)d 4900.64 3820.00 5994.43
Total kilometres of all roadsb 25161.57 23167.00 15144.02
Road area (km2)b 150.81 136.43 104.14
Kilometres of impassable roadb 3495.96 2343.00 3741.87
Maintenance ratio of general road (%)b 53.94 53.30 0.12
Number of tertiary care centrese 3.72 3.00 3.58
Number of fire stationsf 96.66 78.00 82.14
Percentage of emergency teamf with EMT to all emergency teams (%) 70.34 71.30 16.47
Number of ambulancesf 119.91 94.00 74.75
Number of emergency teamsf 100.23 79.00 60.13
Number of emergency teams with EMTf 73.17 50.00 53.85
Number of EMTf   189.00 249.91
Number of emergency crewf 1232.68 968.00 743.49
Number of emergency medical specialistse 41.11 21.00 54.00
Number of tertiary hospitalsg 4.32 3.00 3.64
Number of secondary hospitalsg 76.49 52.00 65.85
Number of primary hospitalsg 36.91 28.00 30.88
  1. N = 47 for all variables. EMT, emergency medical technician.
  2. aMinistry of Internal Affairs and Communications, Statistics Bureau 2004.
  3. bNational Land and Transportation Ministry 2003.
  4. cGeographic Institute Survey 2005.
  5. dNational Land and Transportation Ministry 1983.
  6. eJapanese Association for Acute Medicine, as of February 2005.
  7. fFire and Disaster Management Agency, Ministry of Internal Affairs and Communications 2004.
  8. gSurvey of Health Care Facility, 2002 Ministry of Health, Labour and Welfare.