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Table 4 Results of linear mixed effects models for primary and secondary outcomes after 3 months of extended Big White Wall access

From: Extending access to a web-based mental health intervention: who wants more, what happens to use over time, and is it helpful? Results of a concealed, randomized controlled extension study

Outcome Extension Group, LS mean (SE) (n = 55) Discontinuation Group, LS mean (SE) (n = 57) Interaction term (time by group) P-value
na Baselineb na 3 months na Baselineb na 3 months v d F  
Primary Outcome
 RAS-r 55 82.0 (1.90) 39 82.0 (2.06) 57 83.3 (1.87) 32 81.0 (2.16) 1 77 1.02 .31
Secondary Outcomes
 PHQ-9 55 13.5 (0.86) 36 12.0 (0.97) 57 11.2 (0.85) 32 11.6 (1.0) 1 77 2.76 .10
 GAD-7 55 10.0 (0.73) 36 9.2 (0.84) 57 9.8 (0.72) 32 10.2 (0.88) 1 79 1.17 .28
 EQ-VAS 55 53.7 (3.0) 36 57.6 (3.6) 57 59.2 (3.0) 30 59.2 (3.9) 1 76 0.52 .47
 CIQ 55 13.7 (0.62) 36 14.1 (0.69) 57 13.7 (0.63) 30 14.0 (0.73) 1 69 0.00 .99
  1. All models were adjusted for fixed effects of group, time, and recruitment site with random, subject-specific intercepts to account for repeated measures
  2. LS mean Least squares mean estimated from linear mixed effects models, Numerator (v) and denominator (d) degrees of freedom corresponding with F test statistic, RAS-r Recovery Assessment Scale – revised, PHQ-9 Patient Health Questionnaire – 9 item, GAD-7 Generalized Anxiety Disorder Questionnaire – 7 item, EQ-VAS EuroQOL Visual Analog Scale, CIQ Community Integration Questionnaire
  3. aAfter missing data
  4. bRepresents baseline for the extension trial, which was at the time of re-randomization after the first 3 months of intervention access during the main trial