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Table 5 Correlations between mean monthly meteorological factors and the number of patients with tree pollen allergy

From: Impact of meteorological variation on hospital visits of patients with tree pollen allergy

Month Meteorological factors No. of patients
   April May June July Totala
February Average temperature (°C) -0.21 0.03 0.56 -0.08 0.06
  Maximum temperature (°C) -0.14 0.06 0.59 -0.04 0.11
  Minimum temperature (°C) -0.29 -0.02 0.49 -0.14 -0.01
  Relative humidity (%) -0.12 -0.007 0.21 -0.26 -0.05
  Precipitation (mm) 0.08 0.24 0.44 0.38 0.30
March Average temperature (°C) 0.39 0.38 0.37 0.24 0.38
  Maximum temperature (°C) 0.15 0.11 0.05 0.07 0.11
  Minimum temperature (°C) 0.71* 0.76* 0.68* 0.56 0.75*
  Relative humidity (%) 0.63 0.57 0.54 0.25 0.56
  Precipitation (mm) 0.27 0.35 0.60 -0.03 0.33
April Average temperature (°C) 0.33 0.18 -0.14 0.35 0.21
  Maximum temperature (°C) 0.30 0.14 -0.16 0.24 0.15
  Minimum temperature (°C) 0.23 0.24 -0.02 0.37 0.22
  Relative humidity (%) 0.16 0.29 0.25 -0.10 0.16
  Precipitation (mm) -0.03 -0.11 -0.12 0.28 -0.005
May Average temperature (°C) - 0.54 0.47 0.36 0.5
  Maximum temperature (°C) - 0.53 0.38 0.34 0.45
  Minimum temperature (°C) - 0.36 0.45 0.22 0.38
  Relative humidity (%) - -0.1 0.03 -0.44 -0.18
  Precipitation (mm) - 0.26 0.55 -0.01 0.3
  1. Data are Pearson's correlation coefficients. *P < 0.05
  2. aTotal numbers of patients are the sum of patients with tree pollen allergy from April through July. For meteorological factors in May, total numbers of patients from May to July were used