Feasibility indicator | Early Group (1982–2006) | Middle Group (2011–2013) | Late Group (2018–2020) | |||
---|---|---|---|---|---|---|
N=200 | N=200 | N=200 | ||||
Margina | 95% CIb | Margina | 95% CIb | Margina | 95% CIb | |
Recruitment | 0.67 | 0.60–0.74 | 0.70 | 0.64–0.77 | 0.76 | 0.71–0.82 |
Retentionc | 0.98 | 0.97–1.00 | 0.99 | 0.98–1.00 | - | - |
Acceptability | ||||||
 Description of quantitative measure | 0.21 | 0.16–0.27 | 0.29 | 0.23–0.35 | 0.45 | 0.39–0.52 |
 Quantitative outcome | 0.26 | 0.19–0.32 | 0.35 | 0.28–0.42 | 0.49 | 0.42–0.55 |
 Description of qualitative measure | 0.15 | 0.09–0.19 | 0.21 | 0.15–0.27 | 0.36 | 0.29–0.43 |
 Qualitative outcome | 0.19 | 0.14–0.25 | 0.23 | 0.17–0.29 | 0.36 | 0.29–0.43 |
Attendance | ||||||
 Description of measure | 0.15 | 0.10–0.21 | 0.18 | 0.12–0.23 | 0.22 | 0.16–0.27 |
 Outcome | 0.33 | 0.26–0.39 | 0.36 | 0.29–0.42 | 0.32 | 0.25–0.38 |
Compliance | ||||||
 Description of measure | 0.21 | 0.15–0.26 | 0.26 | 0.19–0.32 | 0.35 | 0.28–0.41 |
 Outcome | 0.24 | 0.18–0.29 | 0.28 | 0.21–0.34 | 0.42 | 0.35–0.49 |
 Cost | 0.17 | 0.12–0.23 | 0.19 | 0.15–0.25 | 0.23 | 0.20–0.31 |
Treatment fidelity | ||||||
 Description of measure | 0.11 | 0.07–0.15 | 0.19 | 0.14–0.25 | 0.24 | 0.18–0.29 |
 Outcome | 0.11 | 0.06–0.15 | 0.12 | 0.07–0.17 | 0.20 | 0.14–0.26 |
 Mentioned feasibility-related parameters in purpose statement | 0.50 | 0.43–0.57 | 0.58 | 0.51–0.65 | 0.71 | 0.64–0.77 |
 Cited a guideline/framework for the reporting of preliminary studies | 0.01 | −0.01–0.02 | 0.05 | 0.02–0.09 | 0.23 | 0.17–0.28 |