Table 2 Effectiveness of interventions in participation to EHCSIR (Using mixed-effects logistic regression models)
The First Phase (n = 1880) | |||||||
|---|---|---|---|---|---|---|---|
Analysis approach | Intervention | n | Participation % (95% CI) | OR unadjusted (95% CI) | P-value | OR adjusted a * (95% CI) | P-value |
Intention to Treat (n = 1880) | SMS | 135/599 | 22.54 (19.25–26.10) | 1 | 1 | ||
Phone call | 131/608 | 21.55 (18.34–25.03) | 1.30 (0.47–3.64) | 0.612 | 0.77 (0.21–2.78) | 0.692 | |
Invitation letter | 182/673 | 27.04 (23.72–30.57) | 1.88 (1.20–2.95) | 0.006 | 1.80 (1.14–2.85) | 0.012 | |
Contacted person (n = 1515) | SMS | 135/499 | 27.05 (23.20–31.18) | 1 | 1 | ||
Phone call | 131/490 | 26.73 (22.86–30.89) | 1.20 (0.47–3.07) | 0.699 | 0.79 (0.25–2.49) | 0.682 | |
Invitation letter | 182/526 | 34.60 (30.54–38.84) | 1.78 (1.13–2.80) | 0.013 | 1.67 (1.05–2.66) | 0.032 | |
Per –protocol (n = 1316) | SMS | 122/409 | 29.83 (25.43–34.52) | 1 | 1 | ||
Phone call | 131/490 | 26.73 (22.87–30.89) | 1.02 (0.41–2.54) | 0.966 | 0.65 (0.22–1.92) | 0.434 | |
Invitation letter | 166/417 | 39.81 (35.07–44.69) | 1.77 (1.09–2.88) | 0.022 | 1.60 (0.98–2.64) | 0.063 | |
Per-treat (n = 1515) | SMS | 122/409 | 29.83 (25.43–34.52) | 1 | 1 | ||
Phone call | 160/689 | 23.22 (20.12–26.56) | 0.52 (0.32–0.86) | 0.009 | 0.45 (0.27–0.73) | 0.001 | |
Invitation letter | 166/417 | 39.81 (35.08–44.69) | 1.80 (1.14–2.85) | 0.012 | 1.59 (1.00–2.53) | 0.048 | |
The Second Phase (n = 1633) | |||||||
Analysis approach | Intervention | n | Participation % (95% CI) | OR b unadjusted (95% CI) | P-value | OR b adjusted (95% CI) | P-value |
Intention to Treat (n = 1633) | Invitation letter | 264/783 | 33.72 (30.41–37.15) | 1 | 1 | ||
Invitation letter& video | 174/850 | 20.47 (17.81–23.34) | 0.70 (0.28–1.71) | 0.431 | 0.58 (0.24–1.36) | 0.209 | |
Contacted person (n = 1258) | Invitation letter | 264/571 | 46.23 (42.08–50.42) | 1 | 1 | ||
Invitation letter& video | 174/687 | 25.33 (22.11–28.75) | 0.55 (0.24–1.25) | 0.151 | 0.41 (0.15–1.07) | 0.069 | |
Per –protocol (n = 768) | Invitation letter | 261/510 | 51.18 (46.74–55.60) | 1 | 1 | ||
Invitation letter& video | 78/259 | 30.12 (24.59–36.10) | 0.60 (0.19–1.95) | 0.398 | 0.27 (0.08–0.85) | 0.026 | |
Per-treat (n = 1098) | Invitation letter | 356/839 | 42.43 (39.06–45.86) | 1 | 1 | ||
Invitation letter& video | 78/259 | 30.12 (24.59–36.10) | 1.03 (0.71–1.47) | 0.889 | 1.27 (0.87–1.85) | 0.209 | |