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Table 4 Results of outcome variables

From: A cluster randomized controlled trial of an online psychoeducational intervention for people with a family history of depression

Variables Intervention group Control group Adjusted
N Baseline Follow-Up N Baseline Follow-Up ICC Comparative statistica 95% CI statistic p
Intention to Undergo Therapy as a Risk Reduction Strategy 113 0.47 (.50) 0.69 (.46) 83 0.75 (.44) 0.75 (.44) 0b 5.83 1.58–21.47 0.008
Patient Health Questionnaire 119 6.49 (6.0) 5.48 (5.5) 81 7.56 (6.3) 6.64 (5.3) 0.068 0.25 −0.74 – 1.24 0.625
Perceived Devaluation and Discrimination 117 20.62 (4.8) 19.74 (5.1) 83 20.57 (5.4) 19.61 (5.8) 0.044 0.29 −0.98 – 1.56 0.662
Knowledge of Risk Factors 117 6.08 (1.8) 7.16 (1.6) 83 6.08 (1.8) 6.74 (1.5) 0b 0.47 0.05–0.88 0.029
Perceived Risk
 MDD
  Comparative Risk 114 2.47 (1.0) 2.34 (1.1) 83 2.54 (1.2) 2.40 (1.1) 0b −0.03 −0.27 – 0.20 0.774
  % Risk 114 46.93 (24.6) 43.07 (26.4) 83 51.69 (30.6) 49.16 (30.1) 0.026 −2.66 −7.87 – 2.55 0.319
 BD
  Comparative Risk 113 1.54 (1.0) 1.51 (1.0) 83 1.43 (1.3) 1.63 (1.3) 0.054 −0.21 −0.51 – 0.09 0.195
  % Risk 114 35.44 (22.5) 26.67 (18.8) 92 32.77 (28.2) 35.30 (28.6) 0.002 −11.13 −16.52 – −5.73 < 0.001
  1. Significant findings in bold
  2. aComparative statistics are: odds ratio for dichotomous variable intention to undergo therapy (0 – no intention to undergo therapy vs 1 – intention to undergo therapy or actually have undergone therapy) and estimated mean difference for all remaining continuous variables
  3. bIf ICC < 0 it was assumed to be equal to 0. All analyses used randomisation as the primary predictor and: (1) family history with MDD and BD symptoms, and (2) SES of GP practice location, as covariates