Table 1 Results of meta-analyses of cohort studies of publication bias
Cohort category | No. of cohort studies | Pooled odds ratio (95% CI) | Heterogeneity test: I 2 (p value) |
|---|---|---|---|
Statistically significant versus non-significant results | |||
Inception cohorts | 4 | 2.40 (1.18 to 4.88) | 61% (0.05) |
Regulatory cohorts | 1 | 11.06 (0.56 to 219.68) | Â |
Abstract cohorts | 12 | 1.62 (1.34 to 1.96) | 40% (0.08) |
Manuscript cohorts | 2 | 1.15 (0.64 to 2.10) | 48% (0.17) |
Positive versus non-positive results | |||
Inception cohorts | 12 | 2.78 (2.10 to 3.69) | 37% (0.09) |
Regulatory cohorts | 4 | 5.00 (2.01 to 12.45) | 64% (0.04) |
Abstract cohorts | 27 | 1.70 (1.44 to 2.02) | 61% (<0.001) |
Manuscript cohorts | 4 | 1.06 (0.80 to 1.39) | 22% (0.28) |