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Table 1 Summary statistics for daily clinic consultations, concentrations of SPM, airborne pollen and meteorological variables by the presence of AD

From: Association of Asian Dust with daily medical consultations for pollinosis in Fukuoka City, Japan

  AD-affected days AD-free days P-value for difference
Total number of days 238 3392  
Median (range) per year 7 (1, 26) 82 (63, 89)  
Clinic consultation [mean (SD)]
 Clinic I 8.4 (9.9) 8.7 (10.4) 0.65
 Clinic II 7.7 (8.7) 8.8 (9.0) 0.14
 Clinic III 11.9 (12.4) 12.3 (13.3) 0.73
 Clinic IV 4.6 (7.0) 5.2 (6.8) 0.39
SPM (μg/m3)
 Mean (SD) 58.9 (32.2) 29.4 (13.4) <0.01
 Median (IQR) 52.7 (40.2, 67.6) 26.8 (19.8, 36.0)  
 10th, 90th centile 28.6, 88.3 15.3, 47.1  
 Days missing (%)a 10 (1.5) 174 (2.7)  
Pollen (grain/cm2)
 Mean (SD) 45.5 (110.4) 30.1 (77.2) 0.06
 Median (IQR) 3.5 (0.8, 23.1) 3.0 (0.5, 18.5)  
 10th, 90th centile 0, 153 0, 90  
 Days missing (%)a 0 (0) 53 (0.8)  
Temperature (°C)
 Mean (SD) 13.9 (3.2) 11.0 (4.2) <0.01
Relative humidity (%)
 Mean (SD) 58.3 (10.7) 63.5 (13.1) <0.01
  1. AD Asian dust, SPM suspended particulate matter, SD standard deviation, IQR interquartile range
  2. aTotal for four clinics