Table 1. Definitions of intention to treat (ITT) in relation to missing outcome data (MOD).

	No (%) of articles (n = 66)
Did not provide a definition of ITT	5 (8)
Did not discuss relationship between ITT and MOD	25 (38)
Addressed MOD in relation to ITT	36 (55)
Provided one definition of ITT	19
Complete follow-up is required under ITT	7
ITT and MOD are separate issues	1
ITT involves a specific strategy for MOD	11
Provided multiple definitions of ITT *	17
Complete follow-up is required under ITT	14
ITT and MOD are separate issues	5
ITT involves a specific strategy for MOD	17

^*For details please see Appendix S4, Table 1.