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Table 4 Spearman’s rank correlation coefficient (r) between concentrations of NBFRs in ESD

From: Novel brominated flame retardants in house dust from Shanghai, China: levels, temporal variation, and human exposure

  PBT PBEB HBB EHTBB BTBPE BEHTEBP DBDPE
PBT   0.879** 0.445 0.635** 0.086 − 0.083 0.556*
PBEB 0.879**   0.249 0.573* 0.205 − 0.090 0.564*
HBB 0.445 0.249   0.676** 0.345 − 0.116 0.161
EHTBB 0.635** 0.573* 0.676**   0.154 0.014 0.469*
BTBPE 0.086 0.205 0.345 0.154   − 0.091 0.014
BEHTEBP − 0.083 − 0.090 − 0.116 0.014 − 0.091   − 0.270
DBDPE 0.556* 0.564* 0.161 0.469* 0.014 − 0.270  
  1. P < 0.05; ** P < 0.01