Cochrane Style Manual
Abbreviations to avoid

These abbreviations should be avoided, although they may be appropriate for tables if footnoted.

Term Abbreviation
chemical names Hg for mercury (although may be used as part of a unit, for example, 'mmHg')
week wk
weight wt

Latin abbreviations used for dosing (e.g. qd, bd, bid, bds, qds, qid, tds, tid) should not be used. Doses should always be written in full and in English throughout the text and tables.