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Table 7.3.a: Checklist of items to consider in data collection or data extraction

Items without parentheses should normally be collected in all reviews; items in square brackets may be relevant to some reviews and not others.


  • Study ID (created by review author).

  • Report ID (created by review author).

  • Review author ID (created by review author).

  • Citation and contact details.


  • Confirm eligibility for review.

  • Reason for exclusion.


  • Study design.

  • Total study duration.

  • Sequence generation*.

  • Allocation sequence concealment*.

  • Blinding*.

  • Other concerns about bias*.


  • Total number.

  • Setting.

  • Diagnostic criteria.

  • Age.

  • Sex.

  • Country.

  • [Co-morbidity].

  • [Socio-demographics].

  • [Ethnicity].

  • [Date of study].


  • Total number of intervention groups.

For each intervention and comparison group of interest:

  • Specific intervention.

  •  Intervention details (sufficient for replication, if feasible).

  •  [Integrity of intervention].


  • Outcomes and time points (i) collected; (ii) reported*.

For each outcome of interest:

  • Outcome definition (with diagnostic criteria if relevant).

  • Unit of measurement (if relevant).

  • For scales: upper and lower limits, and whether high or low score is good.


  • Number of participants allocated to each intervention group.

For each outcome of interest:

  • Sample size.

  • Missing participants*.

  • Summary data for each intervention group (e.g. 2×2 table for dichotomous data; means and SDs for continuous data).

  • [Estimate of effect with confidence interval; P value].

  • [Subgroup analyses].


  • Funding source.

  • Key conclusions of the study authors.

  • Miscellaneous comments from the study authors.

  • References to other relevant studies.

  • Correspondence required.

  • Miscellaneous comments by the review authors.

*Full description required for standard items in the ‘Risk of bias’ tool (see Chapter 8, Section 8.5).