Table 3

Estimated mean (SEM) neurobehavioural performance for exposed and control participants

Neurobehavioural testsControl (n=50) Mean (SEM)Exposed (n=52) Mean (SEM)Holm adjusted p value*95% CI for difference†
Multiple regression was used to adjust for age and education; results are for a 42 year old person with 12 years of education.
*p values less than 0.05 are significant.
†Difference between means; exposed mean − control mean.
Verbal abstraction
    Similarities10.91 (0.23)9.68 (0.24) 0.003−1.88 to −0.57
Visuomotor speed
    Digit Symbol27.19 (0.60)23.85 (0.62)0.001−4.97 to −1.72
    Trailmaking A (s)56.43 (0.90)60.02 (0.93)0.030 1.15 to 6.02
    Trailmaking B (s)113.18 (1.56)119.97 (1.61)0.015 2.58 to 11.01
Problem solving
    Block design22.41 (0.61)20.68 (0.64)0.124−3.39 to −0.07
Attention
    PASAT19.65 (0.16)19.40 (0.17)0.568−0.69 to 0.20
    Letter Cancel (errors)2.83 (0.18)3.52 (0.19)0.037 0.19 to 1.18
Memory
    Digit Span Forward4.87 (0.13)4.38 (0.13)0.037−0.84 to −0.14
    Digit Span Backward3.64 (0.10)3.09 (0.10)0.003−0.84 to −0.28
    BVRT5.48 (0.13)4.82 (0.13)0.003−1.01 to −0.31
    Story Recall A17.93 (0.22)17.76 (0.22)0.570−0.76 to 0.42
    Story Recall B3.09 (0.10)2.76 (0.10)0.052−0.59 to −0.07