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Table 1 Value assignment of the climatic and geographic factors

From: Spatial epidemiology and spatial ecology study of worldwide drug-resistant tuberculosis

Geographical climate index Variable Assignment
Annual precipitation (AP) 0 mm ≤ AP < 200 mm 1
  200 mm ≤ AP < 500 mm 2
  500 mm ≤ AP < 1000 mm 3
  1000 mm ≤ AP < 2000 mm 4
  2000 mm ≤ AP 5
Annual atmospheric temperature (AAT) 30°C ≤ AAT 6
  20°C ≤AAT < 30°C 5
  10°C ≤ AAT < 20°C 4
  0°C ≤AAT < 10°C 3
  -10°C ≤ AAT < 0°C 2
  -20°C ≤ AAT < -10°C 1
Temperature climate zone (TCZ) frigid zone 1
  subfrigid zone 2
  temperate zone 3
  subtropical zone 4
  tropical zone 5
Geography climatic zone (GCZ) continental climate 1
  transitional climate 2
  oceanic climate 3
Geography latitude (GL) 0° ≤ GL < 25° 3
  25° ≤ GL < 50° 2
  50° ≤ GL < 75° 1