Trial classification | Independent variable | Estimate | SE | (95CI) | |
---|---|---|---|---|---|
Includes only studies with N > 100 | Linear effect |  − 0.31 | 0.08 | (− 0.47, |  − 0.15) |
Excludes N ≤ 100 (i.e., small studies) and studies classified as pilot/feasibility | 0–20% | 0.46 | 0.08 | (0.30, | 0.62) |
20–40% | 0.12 | 0.04 | (0.04, | 0.19) | |
40–60% | 0.13 | 0.04 | (0.05, | 0.21) | |
60–80% | 0.11 | 0.04 | (0.04, | 0.18) | |
80–100% | 0.02 | 0.04 | (− 0.06, | 0.10) | |
Includes only studies with sample sizes > 370 | Linear effect |  − 0.48 | 0.12 | (− 0.71, |  − 0.24) |
Excludes N ≤ 370 and studies classified as pilot/feasibility | 0–20% | 0.30 | 0.06 | (0.19, | 0.41) |
20–40% | 0.20 | 0.05 | (0.09, | 0.31) | |
40–60% | 0.04 | 0.05 | (− 0.06, | 0.15) | |
60–80% | 0.08 | 0.06 | (− 0.04, | 0.21) | |
80–100% | 0.01 | 0.15 | (− 0.29, | 0.32) | |
Includes studies with N > 100 and are classified as pilot/feasibility | Linear effect | 0.39 | 0.10 | (0.19, | 0.59) |
Excludes N ≤ 100 (i.e., small studies) | 0–20% | 0.03 | 0.03 | (− 0.04, | 0.09) |
20–40% | 0.10 | 0.03 | (0.04, | 0.17) | |
40–60% | 0.11 | 0.04 | (0.02, | 0.19) | |
60–100% | 0.29 | 0.06 | (0.16, | 0.41) | |
Includes all studies except for studies classified as pilot/feasibility | Linear effect | 0.16 | 0.09 | (− 0.03, | 0.34) |
 | 0–20% | 0.02 | 0.02 | (− 0.02, | 0.05) |
20–40% | 0.08 | 0.02 | (0.04, | 0.12) | |
40–60% | 0.06 | 0.04 | (− 0.02, | 0.14) | |
60–100% | 0.02 | 0.06 | (− 0.10, | 0.13) |