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Table 3 Reporting of essential information

From: Risk of bias in observational studies using routinely collected data of comparative effectiveness research: a meta-research study

Reporting of essential information N = 77 (%)
Study characteristics
 - Specification of the target trial 2 (3)
 - Using a diagram to illustrate study design 14 (18)
Eligibility criteria
 - Inclusion criteria for the study 76 (99)
 - Post-baseline events in inclusion criteria (e.g., use of treatment, no follow-up data) 9 (12)
 - Exclusion of individuals with contraindications for interventions evaluated 9 (12)
Adjustment for confounders
 - Propensity score 60 (70)
 - Inverse probability weighting 10 (12)
 - Multivariable regression 15 (17)
 - Instrumental variable 2 (2)
Outcome
 - Primary outcome reported 77 (100)
Causal contrast of interests
 - Intention-to-treat effect 11 (14)
 - Per-protocol effect 6 (8)
 - Both 10 (13)
 - Not specified 50 (65)
Key time point of the target trial
 - Time point of the start of follow-up 72 (94)
 - Time point of eligibility criteria 72 (94)
 - Time point of treatment assignment 68 (88)
 - All three time points 63 (81)