Table 2 Summary of iterative models predicting odds of publication based on abstracts characteristics

Randomized multi-arm trial

1.52

1.09

2.11

1.49

1.07

2.08

1.30

0.92

1.85

0.96

0.57

1.62

0.77

0.21

2.82

Significance

1.17

0.81

1.70

1.12

0.76

1.66

1.03

0.56

1.92

0.86

0.37

1.99

Sample size (n ≤ 24 referent)

 25–49

1.89

1.19

3.02

1.88

1.18

2.99

1.96

0.63

6.16

 50–99

2.01

1.25

3.25

2.00

1.24

3.23

1.10

0.36

3.39

  ≥ 100

1.82

1.09

3.03

1.81

1.08

3.01

1.01

0.34

2.97

Randomized multi-arm trial × significance

1.40

0.67

2.95

1.01

0.22

4.75

Randomized multi-arm trial × sample size

 25–49

0.90

0.14

5.88

 50–99

2.22

0.38

13.06

  ≥ 100

1.66

0.28

9.75

Significance × sample size

 25–49

0.86

0.22

3.38

 50–99

0.96

0.23

3.93

  ≥ 100

1.84

0.46

7.41

Randomized multi-arm trial × significance × sample size

 25–49

1.87

0.21

16.89

 50–99

1.87

0.22

15.94

  ≥ 100

1.07

0.12

9.67

Conference^a

0.73

0.51

1.05

0.71

0.49

1.03

0.78

0.53

1.15

0.77

0.52

1.14

0.73

0.49

1.08

Year^b

1.04

0.98

1.09

1.03

0.98

1.09

1.04

0.98

1.10

1.04

0.98

1.10

1.04

0.99

1.11