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Table 13 RUCC-stratified domain-specific loadings and 95% confidence intervals (95% CI) on overall EQI for 3141 EQI counties (2000–2005)

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

Metropolitan urbanized areas; RUCC 1 (n = 1089 Coefficient 95% CI
Air domain index 0.5063 0.4379, 0.5747
Water domain index 0.2757 0.1828, 0.3686
Land domain index 0.4379 0.36552, 0.5107
Sociodemographic domain index 0.4538 0.3945, 0.5131
Built environment domain index 0.5196 0.4565, 0.5827
Non-metropolitan urbanized areas; RUCC 2 (n = 323) Coefficient 95% CI
Air domain index 0.3343 0.0.80, 0.5705
Water domain index 0.2958 0.0738, 0.5178
Land domain index 0.5506 0.4168, 0.6845
Sociodemographic domain index 0.5963 0.4913, 0.7012
Built environment domain index 0.3769 0.1719, 0.5819
Less-urbanized areas; RUCC 3 (n = 1059) Coefficient 95% CI
Air domain index 0.1609 0.0477, 0.2740
Water domain index 0.2981 0.1976, 0.3987
Land domain index 0.5503 0.4905, 0.6058
Sociodemographic domain index 0.5675 0.5112, 0.6238
Built environment domain index 0.5102 0.4479, 0.5726
Thinly populated areas; RUCC 4 (n = 670) Coefficient 95% CI
Air domain index 0.0285 −0.1507, 0.2076
Water domain index 0.1347 −0.0444, 0.3138
Land domain index 0.5785 0.4920, 0.6649
Sociodemographic domain index 0.6263 0.5555, 0.6972
Built environment domain index 0.5041 0.3980, 0.6103