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. 2013 May 8;8(5):e63584. doi: 10.1371/journal.pone.0063584

Table 2. Thresholds used to create the exposure indicator components.

Exposure indicator component Dimension Exposure value
Population density (thousand persons/sq.km) <0.10 0
≥0.10–<0.25 0.25
≥0.25–<0.5 0.5
≥0.5–<1.0 0.75
≥1.0 1
Land cover component Urban 1
Agricultural/plantation 0.50
Mixed vegetated/agricultural 0.25
Forest 0
Temperature Maximum monthly temperature, lag of 2 months >20°C and ≤34°C : linear increase in exposure up to 1; ≤20°C or >34°C : 0 exposure
Precipitation Monthly cumulative precipitation, lag of 2 months <300 mm precipitation: linear increase in exposure up to 1; >300 mm monthly precipitation: 0 exposure