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Table 1 Descriptive summaries and odds ratios for primary and secondary outcomes

From: The effect of personalised versus non-personalised study invitations on recruitment within the ENGAGE feasibility trial: an embedded randomised controlled recruitment trial

Outcome Total (n = 509) Personalised (n = 254) Non-personalised (n = 255) Odds ratio 95% confidence interval p
n (%) n (%) n (%) Lower threshold Upper threshold
Enrolled 56 (11.0) 30 (11.8) 26 (10.2) 1.18 0.68 2.06 0.56
Registered interest in participating 28 (5.5) 14 (5.5) 14 (5.5) 1.00 0.47 2.15 0.99
Opted out 164 (32.2) 81 (31.9) 83 (32.6) 0.97 0.67 1.41 0.87
Completed a reasons for non-participation questionnaire 152 (29.9) 77 (30.3) 75 (29.4) 1.04 0.71 1.53 0.82
Consented to participate 60 (11.8) 31 (12.2) 29 (11.4) 1.08 0.63 1.86 0.77
Completed the eligibility interview for inclusion 57 (11.2) 30 (11.8) 27 (10.6) 1.13 0.65 1.96 0.66
Completed the semi-structured interview at baseline 55 (10.8) 29 (11.4) 26 (10.2) 1.14 0.65 1.99 0.66
Completed the online Portal assessment at baseline 53 (10.4) 27 (10.6) 26 (10.2) 1.05 0.59 1.85 0.87
Completed the M.I.N.I. at post-treatment (12 weeks) 37 (7.3) 18 (7.1) 19 (7.5) 0.95 0.49 1.85 0.87
Completed the semi-structured interview at post-treatment (12 weeks) 37 (7.3) 18 (7.1) 19 (7.5) 0.95 0.49 1.85 0.87
Completed the online Portal assessment at post-treatment (12 weeks) 28 (5.5) 13 (5.1) 15 (5.9) 0.86 0.40 1.85 0.71
Completed the M.I.N.I at 6-month follow-up 36 (7.1) 17 (6.7) 19 (7.5) 0.89 0.45 1.76 0.74
Completed the online Portal assessment at 6-month follow-up 33 (6.5) 15 (5.9) 18 (7.1) 0.83 0.41 1.68 0.60
Required a telephone reminder to complete the online Portal assessment at baseline 4 (0.8) 2 (0.8) 2 (0.8) 1.00 0.14 7.18 1.00
Required a telephone reminder to complete the online Portal assessment at post-treatment (12 weeks) 9 (1.7) 5 (2.0) 4 (1.6) 1.26 0.33 4.75 0.73
Required telephone reminder to complete the online Portal assessment at 6-month follow-up 10 (2.0) 5 (2.0) 5 (2.0) 1.00 0.29 3.51 0.99