Table 2 Characteristics, main outcome results (overall and by whether or not the randomized controlled trial (RCT) described in the abstract was published), and the association with publication of the abstracts of RCTs presented at the Association for Research in Vision and Ophthalmology (ARVO) conferences during the years 2001–2004

Funding

Not reported

241

(47.0)

137

(48.4)

104

(45.2)

Reported

272

(53.0)

146

(51.6)

126

(54.8)

 At least one funding source

158

(58.1)

73

(50.0)

85

(67.5)

1.32

(1.09–1.60)

  Industry (pharmaceutical or other)*

56

(20.7)

22

(15.1)

34

(27.0)

1.42

(1.12–1.79)

  Government*

71

(26.1)

31

(21.2)

40

(31.8)

1.31

(1.04–1.65)

  Other*

59

(21.7)

30

(20.6)

29

(23.0)

1.11

(0.84–1.47)

 No funding

114

(41.9)

73

(50.0)

41

(32.5)

0.76

(0.58–0.99)

Number of centers

Not reported

361

(70.4)

208

(73.5)

153

(66.5)

Ref

Reported

152

(29.6)

75

(26.5)

77

(33.5)

1.20

(0.98–1.46)

 Single center

46

(30.3)

31

(41.3)

15

(19.5)

Ref

 Multicenter

106

(69.7)

44

(58.7)

62

(80.5)

1.79

(1.15–2.80)

Presentation at ARVO

Poster

418

(81.5)

239

(84.5)

179

(77.8)

Ref

Oral

95

(18.5)

44

(15.5)

51

(22.2)

1.25

(1.01–1.56)

Main outcome results

Main outcome - Statistical significance

Not reported

285

(55.6)

178

(63.9)

107

(46.5)

Ref

Reported

228

(44.4)

105

(37.1)

123

(53.5)

1.44

(1.19–1.74)

 Not statistically significant

111

(48.7)

52

(49.5)

59

(48.0)

Ref

 Statistically significant

117

(51.3)

53

(50.5)

64

(52.0)

0.97

(0.76–1.24)