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Table 4 Multivariable logistic regression analysis for publication status

From: Exploring trial publication and research waste in COVID-19 randomised trials of hydroxychloroquine, corticosteroids, and vitamin D: a meta-epidemiological cohort study

Characteristics

Crude OR

95% CI

Adjusted OR

95% CI

Drug

    

 Vitamin D

1.00

Ref

  

 Corticosteroid

0.71

0.36–1.42

  

 Hydroxychloroquine

0.78

0.42–1.46

  

Parallel study design

0.67

0.25–1.77

  

Phase 3 or 4

1.47

0.82–2.63

1.28

0.92–1.78

Multinational

1.88

0.75–4.68

0.96

0.32–2.86

> 2 randomised groups

0.71

0.41–1.22

0.56

0.28–1.09

Placebo controlled

1.54

0.95–2.49

1.34

0.75–2.39

Primary sponsor

    

 Academic

1.00

Ref

  

 Research institute

0.56

0.25–1.26

0.38

0.15–0.95

 Government

0.67

0.22–2.01

0.26

0.07 to 0.89

 Medical centre

0.46

0.26–0.82

0.28

0.14–0.56

 Pharmaceutical

0.87

0.28–2.71

0.96

0.29–3.21

 Other

1.4

0.69–2.95

0.85

0.36–2.04

Email address on ICTRP

0.49

0.31–0.78

0.32

0.18–0.58

Target sample size

    

 ≤ 100

1.00

Ref

  

 > 100 ≤ 300

1.5

0.88–2.65

2.1

1.08–4.1

 > 300

1.85

1.05–3.25

2.75

1.35–5.62

Blinding

1.31

0.8 – 2.14