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Table 3 Correlation of BLL with various risk factors of lead exposure

From: Environmental injustice and childhood lead exposure in peri-urban (ger) areas of Darkhan and Erdenet, Mongolia

Housing characteristics and BLL
Variables Type of house < 500 m Distance from big industry < 1 km from gasoline station Distance from train station Recent home renovation Pet ownership Remove shoes in the home
BLL Spearman’s Correlation 0.198 −0.015 0.069 −0.059 0.052 − 0.086 0.118
P-value 0.001 0.795 0.218 0.284 0.573 0.126 0.036
N 335 315 322 329 226 315 319
Heating method and BLL
  Coal Wood Agricultural waste Natural gas Heating oil Electric wall board Central heating system
BLL Spearman’s Correlation 0.008 0.144 0.054 −0.059 −0.052 − 0.004 − 0.107
P-value 0.885 0.009 0.329 0.285 0.341 0.946 0.052
N 335 331 331 331 331 331 331
Fuel used for cooking and BLL
  Coal Wood Agricultural waste Natural gas Electricity
BLL Spearman’s Correlation 0.002 0.146 0.074 0.117 −0.130
P-value 0.974 0.008 0.181 0.034 0.018
N 330 331 331 331 331
Exposure risk factors for apartment residents and BLL
Variables Year structure wasbuilt # Bed rooms #window in the kitchen Brass water meter Frequency of home cleaned Renovation house past 6 months Water damage roof, walls
BLL Spearman’s Correlation −0.244 − 0.098 − 0.146 0.055 − 0.064 0.052 0.199
P-value 0.013 0.297 0.123 0.555 0.492 0.573 0.033
N 105 113 111 115 115 116 113
Exposure risk factors for ger area residents and BLL
Variables Year ger was built Years in the home Type of stove Smoke meats #window Floor gets dusty Frequency of home cleaning
BLL Spearman’s Correlation −0.126 −0.080 0.010 0.032 0.123 0.146 0.111
P-value 0.078 0.231 0.887 0.651 0.107 0.037 0.115
N 197 226 204 198 172 205 202