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Table 1 Descriptive statistics on daily air pollutants, meteorological parameters and outpatient visits in Jinan, China, 2012–2016

From: The impact of outdoor air pollutants on outpatient visits for respiratory diseases during 2012–2016 in Jinan, China

Variable Mean ± SD Min P25 P50 P75 Max
Pollutants (μg/m3)
 PM2.5 93.47 ± 56.37 14.90 56.00 80.00 113.00 443.00
 PM10 166.05 ± 79.85 29.10 113.00 150.00 202.50 693.00
 SO2 68.75 ± 50.30 12.00 36.00 52.00 86.00 429.00
 NO2 52.94 ± 21.12 13.00 38.00 49.00 64.00 165.00
 CO 138.40 ± 640.23 445.00 975.50 1221.00 1590.00 6555.00
 O3 101.32 ± 59.03 9.90 53.00 89.00 143.00 285.00
Meteorological parameters
 Temperature (°C) 15.04 ± 10.50 −12.40 5.50 17.10 24.10 34.00
 Humidity (%) 56.26 ± 19.43 13.00 41.00 55.00 70.00 100.00
 Pressure (kPa) 996.52 ± 9.11 975.70 988.70 996.60 1003.70 1021.80
 Wind speed (m/s) 2.47 ± 1.07 0.20 1.70 2.20 3.00 8.40
Outpatient visits (cases/per day)
 Total 752.00 ± 250.00 349.00 580.00 680.00 828.00 1631.00
 Male 457.00 ± 153.00 210.00 353.00 413.00 503.00 1021.00
 Female 294.00 ± 100.00 120.00 225.00 267.00 327.00 643.00
Age
 <18y 281.90 ± 116.25 128.00 204.00 240.00 321.50 780.00
 18-44y 260.80 ± 96.26 88.00 191.00 235.00 311.00 593.00
 45-64y 120.50 ± 39.30 38.00 93.00 116.00 141.00 282.00
 >64y 88.62 ± 38.32 18.00 59.00 83.00 111.00 276.00
Diagnosis
 Acute bronchitis 506.00 ± 179.83 211.00 380.00 458.00 568.50 1152.00
 Pneumonia 195.87 ± 80.36 65.00 140.00 169.00 232.00 482.00
 Asthma 27.45 ± 15.57 2.00 17.00 24.00 35.00 113.00
 Chronic bronchitis 22.20 ± 15.10 0.00 11.00 20.00 30.00 97.00
  1. SD Standard deviation, Min minimum, Max Maximum, P25 25th percentile, P50 50th percentile, P75 75th percentile;