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Table 1 Inclusion criteria for Cochrane reviews (after abstract screening)

From: Study filters for non-randomized studies of interventions consistently lacked sensitivity upon external validation

Inclusion criteria

I1a

Most current version of a Cochrane review

I2a

A Cochrane review evaluating an intervention on a health-related question (e.g. can also include topics from the field of public health)

I3a

A Cochrane review not only including RCTs or NRCT

I4a

A Cochrane review including NRS (based on the section “Main results” of the abstract of the Cochrane review)

I5a

A Cochrane review including < 65 studies