MinorStudy completion pushed from Jul 1, 2026 to Dec 15, 2027Show 5 more changesShow less
Eligibility criteria shortened, about 59 words
Secondary endpoints: details revised at 7 of 7 entries
Study description revised
Site details revised at 84 of 1031 sites
Publications: details revised at 1 of 1 entry
NotableResults first posted: Mar 3, 2026
Secondary endpoints revised (7)
Primary endpoint revised
Site details revised at 3 of 1031 sites
v39
MinorPrimary completion date changed from estimate of Jan 1, 2026 to Jul 15, 2024
Site details revised at 3 of 1031 sites
v38
NotablePrimary completion date: Jan 1, 2025 to Jan 1, 2026
Study completion date: Jul 2025 to Jul 1, 2026
Start date: Sep 30, 2019 to Oct 29, 2019
Site details revised at 3 of 1031 sites
v37
NotablePrimary completion date: Jan 1, 2024 to Jan 1, 2025
Study completion date: Jul 2024 to Jul 2025
v36
Show 34 earlier versionsHide 34 earlier versions
MinorTrial status: Recruiting to Active, Not Recruiting
Enrollment target: estimated 400 to confirmed 455
Site details revised at 1031 of 1031 sites
v35
MinorStudy sites revised (1031)v34
MinorStudy sites revised (1031)v33
MinorStudy sites: 1025 to 1031v32
MinorSite details revised at 26 of 1025 sitesv31
MinorStudy sites: 1011 to 1025v30
MinorStudy sites: 1004 to 1011v29
MinorStudy sites: 979 to 1004v28
NotablePrimary completion date: May 1, 2022 to Jan 1, 2024
Study completion date: Jul 2022 to Jul 2024
v27
MinorStudy sites: 974 to 979v26
MinorStudy sites: 967 to 974v25
MinorStudy sites: 965 to 967v24
MinorStudy sites: 962 to 965v23
MinorStudy sites: 958 to 962v22
MinorStudy sites: 951 to 958v21
MinorStudy sites: 946 to 951v20
MinorStudy sites: 941 to 946v19
MinorStudy sites: 918 to 941v18
MinorStudy sites: 895 to 918
Eligibility criteria expanded, about 6 words
v17
MinorStudy sites: 887 to 895v16
MinorStudy sites: 882 to 887v15
MinorStudy sites: 868 to 882v14
MinorStudy sites: 828 to 868v13
MinorStudy sites: 800 to 828v12
MinorStudy sites: 777 to 800v11
MinorStudy sites: 709 to 777v10
MinorStudy sites: 700 to 709v9
MinorStudy sites: 686 to 700v8
MinorStudy sites: 634 to 686v7
MinorStudy sites: 590 to 634v6
MinorStudy sites: 532 to 590v5
MinorStudy sites: 258 to 532v4
MinorStudy sites: 110 to 258v3
NotableTrial status: Not Yet Recruiting to Recruiting
Study sites: 0 to 110
Start date changed from estimate of Sep 2019 to Sep 30, 2019
v2
MinorStudy First Submitted
Notable: the trial’s plan changed such as a big move in its timeline or size, a new primary endpoint, sponsor or phase, or recruiting opened or resumed.
Minor: routine progress and housekeeping, such as sites added or enrollment closed.
This phase III trial studies how well vitamin D3 given with standard chemotherapy and bevacizumab works in treating patients with colorectal cancer that has spread to other parts of the body. Vitamin D3 helps the body use calcium and phosphorus to make strong bones and teeth. Drugs used in chemotherapy, such as leucovorin calcium, fluorouracil, oxaliplatin, and irinotecan hydrochloride, work in different ways to stop the growth of tumor cells by killing the cells, by stopping them from dividing, or by stopping them from spreading. Immunotherapy with monoclonal antibodies, such as bevacizumab, may help the body's immune system attack the cancer, and may interfere with the ability of tumor cells to grow and spread. Giving vitamin D3 with chemotherapy and bevacizumab may work better in shrinking or stabilizing colorectal cancer. It is not yet known whether giving high-dose vitamin D3 in addition to chemotherapy and bevacizumab would extend patients' time without disease compared to the usual approach (chemotherapy and bevacizumab).