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. 2013 Feb 12;11(2):e1001481. doi: 10.1371/journal.pbio.1001481

Table 2. Suggested modifications to the ARRIVE guidelines.

Subsection Suggested Additions
Methods
Participants/experimental animals (a) Provide clear details of eligibility criteria in relation to strain, weight range, age range, etc. in Methods section of manuscript; (b) provide description of any run-in testing of suitability of animals for the main experiment; (c) clearly define primary and secondary outcome measures.
Sample size (a) Provide justification of sample size selection and whether this was determined a priori (based on prespecified primary outcome).
Randomization
Randomization sequence generation (a) Report details of method of generating randomization sequence, including details of stratification if used.
Allocation concealment mechanism (a) Provide details of whether the persons generating the randomization schedule were blinded to treatment.
Blinding (a) Provide details of whether persons carrying out randomization, data collection, and data analysis were unaware of treatment group allocation/study hypothesis.
Statistical methods (a) Indicate any subgroup analysis undertaken and details of how animals came to be included in the subgroup; b. report methods of accounting for non-independence of subjects (e.g. litter mates); c. Indicate whether intent-to-treat analysis was used.
Results
Attrition a. Provide a flow-chart of animals from source population through first allocation to the study, assignment to treatment group, to completion of experiment for each outcome measure; (b) provide description of criteria used for exclusion of animals/data points from analysis and whether these were determined a priori; (c) provide explanations for discrepancies in numbers between experiments/outcome measures (attrition, missing data); (d) provide explanation of process for reviewing erroneous data and whether this was undertaken blinded to treatment group.
Baseline data Provide details of the animals used, including species, strain, sex, developmental stage, and weight for each experimental group (preferably in tabular form).
Numbers analysed (a) Report number of animals in each group included in each analysis and whether this was by original assigned groups.