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| Drug Name | Tumor | Stage | Line | Mechanism | Company (US) | First Results | CT.gov |
|---|
Result: 194 out of 519 (37.4%) matched to ClinicalTrials.gov
1. Development Stage is the strongest predictor
The further along the pipeline, the higher the chance of finding a match on CT.gov. Preclinical drugs match only 16% of the time — they are simply too early to have registered trials. Phase I jumps to 40%, Phase II is at 34%, while Phase III–IV reach 50–55%, and Approved drugs hit 56%. This is logical: preclinical candidates often haven't been registered on CT.gov yet.
2. Drug naming pattern is a strong signal
Drugs with digits and special characters in their names (internal lab codes like SC-CAR/CAR-16.21, FGF14 CART) are found less often (29% vs 38%). Conversely, drugs with INN-standard names (endings like -mab, -nib, -lib) match more often (30% vs 24%). This means: many of the unmatched entries are internal laboratory codes that aren't publicly registered.
3. Mechanism of Action shows clear differences
100% matched: Natural Killer Cells. Also high: NK cells (83%), Cancer vaccines (71%), Anti-PD-1 mAb (67%), HDAC inhibitors (63%). On the other end: ODC inhibitors — 0% (all 7 not found), and Radiopharmaceuticals at only 13%. Well-established, widely-studied mechanisms link to CT.gov far better than novel experimental ones.
4. Year of first results shows a moderate trend
Older drugs (2006–2014) have a higher match rate of ~55% — their trials have been published and indexed for years. The 2022–2027 range stabilizes around 34% with many early-stage experimental compounds. Beyond 2028, the rate drops to 28% — these are future projections for drugs still in early development.
5. Line of Therapy
Preclinical line matches at only 18% (not yet on CT.gov). Neoadjuvant hits 100% (though only 3 entries). The bulk — Second line (400 entries) — matches at 39%. First line does better at 46%.
6. Companies show no clear pattern
Large pharma (Novartis, Bayer) range 40–75%. Academic centres vary widely from 0% to 71%. Company alone is not a reliable predictor of CT.gov match.
Conclusion
The main reason 63% of entries are not found is not a search error, but the nature of the data. The ~325 unmatched records are predominantly:
This is not a bug — it reflects reality: not all drugs in a pipeline have registered clinical trials yet.