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Table 6 Sensitivity analyses II: change in DASS between Time 1 and Time 2 for patients with and without major depression

From: A waitlist-controlled trial of group cognitive behavioural therapy for depression and anxiety in Parkinson’s disease

With MDD (n = 6) Intervention (n = 4) Waitlist (n = 2)   
Outcome Time Mean (SD) Mean (SD) p-value* d**
DASS-D 1 11.00 (4.69) 8.00 (0) .020 2.09
2 5.25 (2.87) 7.5 (0.71)
DASS-A 1 9.75 (2.36) 4.00 (1.41) .050 1.19
2 6.25 (3.3) 4.00 (1.41)
DASS-S 1 11.75 (0.96) 7.50 (3.53) .029 1.10
2 9.75 (0.50) 7.50 (3.53)
Without MDD (n = 12) Intervention (n = 7) Waitlist (n = 5)   
Outcome Time Mean (SD) Mean (SD) p-value* d**
DASS-D 1 9.57 (3.36) 12.2 (5.49) .320 .26
2 6.71 (2.29) 10.6 (7.27)
DASS-A 1 9.14 (2.41) 9.80 (4.76) .065 .84
2 5.86 (2.34) 9.40 (4.62)
DASS-S 1 10.00 (4.00) 8.80 (5.17) .365 .38
  2 8.29 (2.14) 8.40 (4.72)   
  1. DASS-D = DASS-Depression, DASS-A = DASS-Anxiety, DASS-S = DASS-Stress, PDQ-39 = Parkinson’s Disease Questionnaire-39, CCL-D = Cognitions Checklist-Depressive Cognitions, CCL-A = Cognitions Checklist-Anxious Cognitions.
  2. *p-value for Time x Condition interaction effect.
  3. **Cohen’s d as computed by M - M S D pooled .