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Table 6 Wald’s Chi-Square Test Statistics and p-values testing equality of regression coefficients for chemical exposure and cognitive functioning between groups, NHANES 1999-2002

From: A path analysis of multiple neurotoxic chemicals and cognitive functioning in older US adults (NHANES 1999–2002)

Path Walds Test Statistic p-value Walds Test Statistic p-value
  Gender (male/female) Age (above/below mean)
PCB 74 → DSC 0.01 0.91 0.08 0.78
PCB 118 → DSC 0.56 0.46 0.99 0.32
PCB 146 → DSC 0.62 0.43 0.44 0.51
PCB 153 → DSC 1.93 0.16 0.51 0.47
Lead → DSC 0.26 0.61 0.37 0.54