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Table 3 The relative risks associated with the volcanic activity for three diagnostic groups.

From: Emergency room visits for respiratory conditions in children increased after Guagua Pichincha volcanic eruptions in April 2000 in Quito, Ecuador Observational Study: Time Series Analysis

  ALRI (n = 2392) AURI (n = 2319) ASTHMA (n = 431)
  RRa LCI UCI RR LCI UCI RR LCI UCI
Period 1b 2.056 1.665 2.538 1.654 1.314 2.082 1.966 1.193 3.239
Period 2c 2.318 1.899 2.830 1.677 1.334 2.107 1.586 0.913 2.754
Period 3d 2.125 1.827 2.473 1.808 1.541 2.122 1.089 0.679 1.746
Period 4e 2.221 1.959 2.518 1.716 1.497 1.968 0.963 0.638 1.453
  1. aThe relative risks and their 95% confidence intervals (LCI, UCI for all ages combined) of an increase in the daily mean ER visits during the defined periods for three diagnostic groups.
  2. bFumarolic activity period – Period 1
  3. cOne week post eruption – Period 2
  4. dTwo weeks post eruption – Period 3
  5. eThree weeks post eruption – Period 4