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Table 2 Mean value of psychiatric symptoms and cognitive performance at different time points in the study

From: Psychiatric disturbances in patients undergoing open-heart surgery

  Preoperative After 1 week After 6 months F P P1 P2 P3
HADS scale Anxiety 7.99 ± 4.2 6.55 ± 3.5 5.92 ± 2.8 8.453 0.001* 0.006* 0.238 0.001*
Depression 7.3 ± 3.3 6.5 ± 3.2 5.9 ± 3.1 4.699 0.017* 0.208 0.430 0.012*
Mini-Mental State Examination 25.70 ± 1.46 25.55 ± 1.81 25.74 ± 1.613 1.162 0.316 0.238 0.219 0.774
WAIS-IV subtests Digit symbol test 38.78 ± 13.71 33.44 ± 13.6 40.46 ± 14.02 12.143 0.001* 0.006* 0.001* 0.391
Forward span 7.67 ± 2.29 6.99 ± 2.33 7.83 ± 2.57 4.51 0.026* 0.014* 0.006* 0.574
Backward Span 5.43 ± 2.26 4.71 ± 2.21 5.81 ± 2.38 5.621 0.007* 0.024* 0.003* 0.248
Block design test 26.11 ± 8.707 21.58 ± 6.4 28.18 ± 9.171 11.32 0.001* 0.001* 0.001* 0.104
Arithmetic test 7.98 ± 1.583 7.24 ± 1.585 7.99 ± 1.678 5.687 0.012* 0.006* 0.005* 0.875
  1. F for one-way ANOVA (analysis of variance), P1 comparing preoperative and after 1-week scales, P2 comparing one week and after 6-month scales, P3 comparing preoperative and after 6 months postoperatively
  2. *Statistically significant at P < 0.05