Table 5Odds of publication and posting of results in ClinicalTrials.gov among all studies registered in ClinicalTrials.gov

OutcomeActiveControlActive With OutcomeActive Without OutcomeControl With OutcomeControl Without OutcomeOdds RatioLower 95% CIUpper 95% CI
PublicationInterventionalObservational1451021.410.0630.99
PublicationDrug studiesAll other studies1150330.220.041.24
PublicationPlacebo controlNo placebo control (active treatments comparison)11323212.410.609.66
PublicationHas resultsNo results available4510483.840.8716.88
PublicationFunded by industryFunded by other sources9341102.650.3023.49
Posting resultsDrug studiesAll other studies754240.260.041.68
Posting resultsPhase 3–4 trialsPhase 1–2 trials5282232.050.3611.58
Posting resultsPlacebo controlNo placebo control (active treatments comparison)7362222.140.4111.23
Posting resultsTerminated for safety reasonsTerminated for other reasons02110.200.008.82
Posting resultsFunded by IndustryFunded by other sources9470114.600.2584.94

From: Results

Cover of Migraine in Adults: Preventive Pharmacologic Treatments
Migraine in Adults: Preventive Pharmacologic Treatments [Internet].
Comparative Effectiveness Reviews, No. 103.
Shamliyan TA, Kane RL, Taylor FR.

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