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Table 1 Overall and RUCC-stratified domain variable means, standard deviations, ranges for select variables in the air domain

From: Construction of an environmental quality index for public health research

   Metropolitan - urbanized Non-metro urbanized Less-urbanized Thinly populated Overall
   (RUCC1 = 1089) (RUCC2 = 323) (RUCC 3 = 1059) (RUCC4 = 670) (n = 3141)
Variable (construct) Units Mean (sd) [range] Mean (sd) [range] Mean (sd) [range] Mean (sd) [range] Mean (sd) [range]
Nitrogen Dioxide Ppb 7.95E + 02 (7.05E + 02) 4.97E + 02 (4.13E + 02) 4.21E + 02 (3.95E + 02) 3.53E + 02 (3.36E + 02) 5.44E + 02 (5.49E + 02)
(Criteria air pollutants) [1.01E + 00, 8.65E + 03] [1.29E + 00, 2.59E + 03] [1.00E + 00, 8.66E + 03] [1.00E + 00, 3.42E + 03] [1.00E + 00, 8.66E + 03]
PM10 μg/m3 14.199 (5.193) 11.258 (4.533) 9.852 (3.924) 8.446 (3.596) 11.204 (4.974)
(Criteria air pollutants) [1.777, 39.554] [2.370, 27.095] [1.000, 34.625] [1.011, 21.404] [1.000, 39.554]
PM2.5 μg/m3 10.621 (2.205) 9.586 (2.351) 9.379 (2.466) 8.265 (2.745) 9.593 (2.582)
(Criteria air pollutants) [3.443, 16.912] [2.162, 14.397] [1.029, 14.451] [1.138, 13.437] [1.029, 16.912]
Carbon disulfide tons emitted 9.05E-03 (1.05E-01) 5.94E-03 (6.12E-02) 2.07E-03 (2.48E-02) 7.92E-04 (1.13E-02) 4.61E-03 (6.66E-02)
(Hazardous air pollutants) [5.50E-07, 2.30E + 00] [1.91E-06, 1.02E + 00] [1.34E-07, 5.66E-01] [5.88E-09, 2.62E-01] [5.88E-09, 2.30E + 00]
Carbon tetrachloride tons emitted 0.497 (0.006) 0.497 (0.003) 0.497 (0.005) 0.496 (0.008) 0.497 (0.006)
(Hazardous air pollutants) [0.429, 0.558] [0.468, 0.511] [0.429, 0.568] [0.395, 0.509] [0.395, 0.568]
Cyanide compounds tons emitted 3.88E-02 (5.55E-02) 0.028 (0.037) 1.29E-02 (3.04E-02) 4.05E-03 (5.00E-03) 2.16E-02 (4.16E-02)
(Hazardous air pollutants) [4.91E-04, 1.35E + 00] [0.003, 0.635] [1.15E-04, 9.50E-01] [3.08E-05, 6.45E-02] [3.08E-05, 1.35E + 00]
Diesel engine emissions tons emitted 0.607 (0.516) 0.352 (0.188) 0.235 (0.129) 1.53E-01 (9.87E-02) 3.59E-01 (3.73E-01)
(Hazardous air pollutants) [0.034, 8.815] [0.035, 1.791] [0.001, 0.991] [1.59E-04, 5.42E-01] [1.59E-04, 8.82E + 00]
Lead compounds tons emitted 2.23E-03 (3.84E-03) 1.43E-03 (1.65E-03) 9.34E-04 (2.21E-03) 6.01E-04 (1.48E-03) 1.36E-03 (2.82E-03)
(Hazardous air pollutants) [3.41E-04, 8.17E-02] [3.51E-04, 1.45E-02] [2.98E-04, 4.74E-02] [2.74E-04, 2.35E-02] [2.74E-04, 8.17E-02]
PAH/POM tons emitted 1.62E-02 (3.00E-02) 0.014 (0.021) 7.66E-03 (1.58E-02) 3.20E-03 (7.15E-03) 1.03E-02 (2.19E-02)
(Hazardous air pollutants) [1.79E-04, 4.45E-01] [0.001, 0.139] [2.64E-05, 3.36E-01] [4.44E-05, 1.25E-01] [2.64E-05, 4.45E-01]
Polychlorinated biphenyls tons emitted 1.71E-04 (4.16E-05) 1.84E-04 (3.62E-05) 1.69E-04 (2.06E-04) 1.43E-04 (6.60E-05) 1.66E-04 (1.27E-04)
(Hazardous air pollutants) [1.27E-04, 5.94E-04] [1.27E-04, 3.47E-04] [1.27E-04, 6.27E-03] [1.27E-04, 1.59E-03] [1.27E-04, 6.27E-03]
Vinyl chloride tons emitted 1.10E-02 (1.09E-02) 6.93E-03 (3.54E-03) 1.33E-03 (3.75E-03) 1.60E-04 (1.09E-03) 4.99E-03 (8.36E-03)
(Hazardous air pollutants)   [5.00E-06, 1.05E-01] [1.27E-06, 1.97E-02] [4.37E-09, 9.41E-02] [6.99E-10, 2.56E-02] [6.99E-10, 1.05E-01]
  1. Complete list of variables is available in Additional file 2.