Skip to main content

Table 2 Concentrations of PM, metals from PM2.5, gaseous pollutants, and climatic conditions (1999 spring and winter)

From: Air pollution and lung function among susceptible adult subjects: a panel study

Variable Unit Spring Winter Overall
   Obs Mean SD GMean IQR Obs Mean SD GMean IQR Mean SD GMean Min Max IQR
PM 2.5 * μg/m3 32 18.2 5.0 17.4 8.1 30 36.7 24.1 27.8 40.9 27.2 19.4 21.8 4.5 100 22.7
PM 10–2.5 * μg/m3 32 18.7 7.4 17.4 9.0 30 12.3 5.4 11.0 8.3 15.6 7.2 14.0 3.4 39.6 7.1
PM 10 * μg/m3 32 36.9 10.8 35.4 13.1 30 49.0 28.1 40.2 45.3 42.8 21.8 37.6 7.9 123 26.9
Cd ng/m3 30 0.29 0.09 0.27 0.14 30 0.63 0.50 0.47 0.47 0.46 0.40 0.36 0.09 2.0 0.31
Cr ng/m3 30 0.90 0.47 0.80 0.61 30 2.8 2.0 2.2 2.7 1.9 1.7 1.3 0.2 9.8 1.6
Fe ng/m3 30 339 180 303 212 30 227 132 190 208 283 167 240 54.1 893 202
Ni ng/m3 30 5.1 4.7 3.6 4.2 30 4.6 8.0 2.7 2.5 4.8 6.5 3.1 1.0 42.3 2.8
Pb ng/m3 30 24.4 9.6 22.2 15.6 30 36.8 23.8 27.7 33.5 30.6 19.0 24.8 2.2 99.8 19.9
Pt pg/m3 30 5.3 6.8 3.3 3.9 30 4.6 10.3 1.4 2.7 5.0 8.6 2.2 0.05 54.9 3.3
V ng/m3 30 2.4 1.6 2.0 2.0 30 1.1 0.52 0.95 0.97 1.8 1.4 1.4 0.47 6.3 1.3
Zn ng/m3 30 28.7 13.0 26.4 15.1 30 63.0 38.2 51.4 58.0 45.8 33.1 36.8 13.9 159 32.9
NO 2 μg/m3 32 76.1 13.6 75.0 17.5 35 65.5 13.3 64.0 14.6 70.6 14.4 69.0 27.6 102 20.9
CO mg/m3 32 2.1 0.3 2.1 0.50 34 12.3 4.9 11.5 6.1 7.4 6.2 5.0 1.6 28.9 10.5
O 3 μg/m3 32 70.9 12.5 69.8 16.9 34 16.0 8.1 14.3 10.0 42.6 29.5 30.8 6.6 95.3 58.7
SO 2 μg/m3 32 4.7 1.8 4.3 2.5 35 7.9 2.2 7.6 3.9 6.4 2.6 5.8 1.2 11.6 4.0
T °C 32 23.7 1.9 23.7 3.3 35 9.5 2.1 9.3 2.7 16.3 7.4 14.5 5.3 27.0 14.3
RelHum % 32 46.5 10.2 45.4 14.0 35 66.7 13.5 65.1 14.0 57.0 15.7 54.8 29.0 87.0 24.0
BarP mm Hg 32 762 2.6 762 3.4 35 762 7.3 762 12.1 762 5.5 762 748 773 6.6
PM 2.5 Indoor § μg/m3 28 24.7 7.8 23.7 9.0 31 27.0 12.0 24.4 18.8 25.9 10.2 24.1 10.2 56.5 14.4
  1. *Averages of 24 h concentrations measured at 2 locations.
  2. Averages of 24 h concentrations recorded at 5 fixed sites.
  3. Averages of 24 h concentrations recorded at 2 fixed sites.
  4. §Averages of 24 h concentrations measured at 3 study participants' homes per season.