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Table 2 Comparison of mean anxiety level in patients of both groups before and after the intervention

From: The effect of natural sounds on the anxiety of patients undergoing coronary artery bypass graft surgery

Groups

Time of intervention

Results of repeated measures ANOVA

Before intervention

30 min after the intervention

In the waiting room

p valueb

p valuec

Mean ± SD

Mean ± SD

Mean ± SD

Intervention group

4.37 ± 47.66

7.21 ± 43.68

7.11 ± 42.95

0.34

0.001

Control group

5.17 ± 48.44

6.69 ± 50.57

6.78 ± 51.28

p valuea

0.44

0.001

0.001

  1. aIndependent t-test (inter-group comparison)
  2. bRepeated measures ANOVA (intra-group comparison)
  3. cRepeated measures ANOVA (interactive effect)