(+) CABG     (-) CABG  
  N=88 z 1 wk z 3 mo N=28 p
Figure Reconstruction 20 ± 7 -1.9 -1.4 20 ± 7 0.96
Delayed Figure Reproduction 7 ± 3 -0.5 -0.2 7 ± 3 0.71
Immediate Story Recall 18 ± 5 -1.2 -1.5 17 ± 4 0.77
Delayed Story Recall 9 ± 3 -1.5 -1.6 8 ± 3 0.27
Immediate Word List Recall 26 ± 7 -2.1 -1.6 23 ± 5 0.09
Delayed Word List Recall 6 ± 3 -2.5 -1.7 5 ± 2 0.09
Digit Span 8 ± 2 -1.2 -1.5 8 ± 2 0.3
Semantic Fluency 16 ± 4 -0.5 -0.2 16 ± 4 0.69
Phonemic Fluency 12 ± 5 -0.6 -0.2 13 ± 5 0.2
Stroop 38 ± 12 -1.3 -0.8 38 ± 12 0.99
Data are expressed as mean�SD, z 1 wk: z-scores at 1 week, z 3 mo: z-scores at 3 months, p values between surgical and nonsurgical groups at baseline are from t-tests
Table 2: Baseline cognitive raw scores and z-scores at 1 week and 3 months after surgery.