How many paroxetine studies registered at ClinicalTrials.gov remain unpublished over five years after their completion date?

I. Database

ClinicalTrials.gov search query: paroxetine
Studies completed before October 2010 (136 NCT Numbers)

-parox

II. PubMed Search Query: 53 PubMed articles –> Matching 28 ClinicalTrials.gov records

PubMed Paroxetine

III. 108 paroxetine studies registered at ClinicalTrials.gov (completed before Oct 2010) –> No PubMed papers matching their corresponding NCT Number

IV. Embase search query of 108 NCT Numbers not found in PubMed:

publications of 8 studies registered at ClinicalTrials.gov were found:
NCT00133276NCT00086190NCT00519012NCT00048204NCT00196664NCT00785603, NCT00744406NCT00457106.

100 NCT Numbers corresponding to paroxetine studies registered at ClinicalTrials.gov (completed before Oct 2010) without matching journal article disclosing the results of the study (PubMed & Embase search).

VI. EBSCO Discovery & Google Scholar: 100 ClinicalTrials.gov paroxetine studies not found after a PubMed and Embase search query (NCT0****1 OR NCT0****2 OR…).

publications corresponding 3 studies registered at ClinicalTrials.gov were found:
NCT00394056NCT00329147NCT00470483.

VII. 97 out of 136 (71%) of the paroxetine studies registered at ClinicalTrials.gov remain unpublished over five years after their completion date.

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