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Table 6 Logistic regression models using GEE for outcomes in trial 2: no choice (postal questionnaire) versus choice of participation mode

From: Improving participation rates by providing choice of participation mode: two randomized controlled trials

  Participation rate Conditional participation rate Willingness to participate
  OR (95% CI) OR (95% CI) OR (95% CI)
SNS choice arm 1.81*** (1.37-2.39) 1.81** (1.29-2.55) 1.42*** (1.22-1.65)
SNS no-choice arm       
TICD-RCT intervention arm 0.95 (0.53-1.73) 0.98 (0.50-1.90) 0.80 (0.54-1.19)
TICD-RCT control arm       
Patient group: CVD 0.95 (0.70-1.30) 0.93 (0.60-1.43) 1.12 (0.65-1.94)
Patient Group: high risk       
Female 0.87 (0.68-1.10) 0.92 (0.67-1.25) 0.86 (0.51-1.44)
Male       
Age 1.01 (0.99-1.02) 1.02* (1.001-1.03) 0.97* (0.94-0.99)
  1. ***p < .001 **p < .01 *p < .05, OR = odds ratio, estimated intercepts omitted from table.