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Table 3 Overall and RUCC-stratified domain variable means, standard deviations, ranges for select variables in the land 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]
Harvested acreage acres harvested per county acres 0.183 (0.208) 0.240 (0.244) 0.240 (0.253) 0.201 (0.218) 0.212 (0.231)
(Agriculture) [0, 0.920] [0, 0.895] [0, 1.221] [0, 0.946] [0, 1.221]
Animal units animal units per county acres 0.151 (0.727) 0.079 (0.116) 0.174 (1.639) 0.103 (0.143) 0.141 (1.047)
(Agriculture) [0, 20.984] [0, 1.235] [0, 46.941] [0, 1.481] [0, 46.941]
Herbicides pounds applied 6.85E + 04 (1.28E + 05) 1.08E + 05 (1.66E + 05) 9.56E + 04 (1.52E + 05) 6.81E + 04 (1.08E + 05) 8.16E + 04 (1.38E + 05)
(Pesticides) [0, 1.18E + 06] [0, 1.08E + 06] [0, 1.15E + 06] [0, 7.16E + 05] [0, 1.18E + 06]
Insecticides pounds applied 3.69E + 03 (8.89E + 03) 6.14E + 03 (1.36E + 04) 5.11E + 03 (1.05E + 04) 2.75E + 03 (5.33E + 03) 4.22E + 03 (9.52E + 03)
(Pesticides) [0, 1.72E + 05] [0, 1.89E + 05] [0, 1.53E + 05] [0, 4.87E + 04] [0, 1.89E + 05]
Arsenic ppm 6.530 (5.445) 6.850 (8.171) 6.435 (5.139) 6.342 (4.304) 6.491 (5.476)
(Contaminants) [0, 91.333] [0, 131.369] [0, 98.893] [0, 43.595] [0, 131.369]
Lead ppm 29.901 (45.950) 22.049 (17.221) 21.219 (24.976) 22.812 (51.740) 24.654 (39.465)
(Contaminants) [0, 1007.300] [0, 196.867] [0, 691.838] [0, 1123.110] [0, 1123.110]
Titanium % weight 0.404 (0.228) 0.369 (0.185) 0.327 (0.165) 0.318 (0.185) 0.356 (0.198)
(Contaminants) [0, 2.118] [0, 1.405] [0, 2.109] [0, 1.941] [0, 2.118]
Iron % weight 2.531 (1.480) 2.372 (1.282) 2.152 (1.186) 2.154 (1.054) 2.307 (1.292)
(Contaminants) [0, 13.731] [0, 8.440] [0, 9.461] [0, 7.165] [0, 13.731]
Phosphorus % weight 0.067 (0.139) 0.056 (0.095) 0.051 (0.059) 0.053 (0.040) 0.057 (0.096)
(Contaminants) [0, 2.203] [0, 1.296] [0, 1.025] [0, 0.509] [0, 2.203]
Facilities facilities per county pop 3.94E-04 (2.77E-04) 4.95E-04 (3.08E-04) 5.59E-04 (4.60E-04) 7.77E-04 (2.33E-03) 5.42E-04 (1.13E-03)
(facilities) [0, 2.30E-03] [4.23E-05, 2.19E-03] [0, 7.55E-03] [0, 5.42E-02] [0, 5.42E-02]
Radon zone radon zone 2.010 (0.815) 2.000 (0.856) 2.022 (0.834) 1.849 (0.809) 1.979 (0.827)
(Radon)   [0, 3.000] [0, 3.000] [0, 3.000] [0, 3.000] [0, 3.000]
  1. Complete list of variables is available in Additional file 2.