Table 2.

Median proportion of incompletely reported efficacy and harm outcomes per trial, stratified by trial characteristics, among 519 randomised trials published in December 2000 and cited in PubMed

	Efficacy outcomes		Harm outcomes
Trial characteristic	No of trials	Median % of incompletely reported outcomes per trial*	No of trials	Median % of incompletely reported outcomes per trial*
All trials	505	42	308	50
Parallel group trials	375	22	237	25
Crossover trials	110	100	62	82
Other study designs	20	59	9	80
General medical journal	37	40	26	58
Specialty journal	468	43	282	47
Full industry funding†	163	46	133	56
Partial or non-industry funding†	290	42	142	27

^*10-90th centile ranges were 0-100% for all median percentages except for efficacy outcomes in crossover trials (48-100%).

^†Trials with unknown funding sources were excluded.