18 and older, any sex, with Myelofibrosis. Patients with the condition only — healthy volunteers not accepted.
Results — posted to ClinicalTrials.gov
Per-arm endpoint measurements with 95% confidence intervals where reported. Source: trial results section.
Percentage of Participants With at Least 35% Reduction in Spleen Volume From Baseline at Week 48Primary· Baseline, Week 48
The change in spleen volume from baseline to week 48 was measured by magnetic resonance imaging (MRI) (or by computer tomography (CT) for participants unable to undergo MRI) and was calculated only for participants who had an evaluable spleen volume at baseline. The percentage of participants achieving a greater than or equal to 35% reduction in spleen volume from baseline to week 48 was then calculated by treatment group.
Group
Value
95% CI
Ruxolitinib
28.5
Best Available Therapy (BAT)
0
Duration of Maintenance of Spleen Volume Reduction (Median)Secondary· Baseline, up to Year 5
DoMSR is defined as the interval between the first spleen volume measurement that is \>=35% reduction from baseline and the first scan that is no longer = 35% reduction AND that is a \>25% increase over nadir. It was evaluated using the Kaplan-Meier estimate for each treatment arm. The analysis was performed only for subjects who achieved greater than 35% reduction in spleen volume.
Group
Value
95% CI
Ruxolitinib
3.22
1.65 – NA
Best Available Therapy (BAT)
NA
NA – NA
Duration of Maintenance of Spleen Volume Reduction (Kaplan-Meier Estimates)Secondary· Baseline, up to Year 5
This is defined as the interval between randomization and date of the first MRI showing a 35% reduction from baseline in spleen volume. The analysis was performed for participants who achieved a 35% reduction in spleen volume.
1.0 year
Group
Value
95% CI
Ruxolitinib
0.72
.60 – .81
Best Available Therapy (BAT)
NA
NA – NA
1.5 years
Group
Value
95% CI
Ruxolitinib
0.67
0.55 – 0.77
Best Available Therapy (BAT)
NA
NA – NA
2.0 years
Group
Value
95% CI
Ruxolitinib
0.63
0.50 – 0.73
Best Available Therapy (BAT)
NA
NA – NA
2.5 years
Group
Value
95% CI
Ruxolitinib
0.54
0.41 – 0.65
Best Available Therapy (BAT)
NA
NA – NA
3.0 years
Group
Value
95% CI
Ruxolitinib
0.51
0.38 – 0.62
Best Available Therapy (BAT)
NA
NA – NA
3.5 years
Group
Value
95% CI
Ruxolitinib
0.48
0.35 – 0.60
Best Available Therapy (BAT)
NA
NA – NA
4.0 years
Group
Value
95% CI
Ruxolitinib
0.48
0.35 – 0.60
Best Available Therapy (BAT)
NA
NA – NA
4.5 years
Group
Value
95% CI
Ruxolitinib
0.48
0.35 – 0.60
Best Available Therapy (BAT)
NA
NA – NA
Percentage of Participants With at Least 35% Reduction in Spleen Volume From Baseline at Week 24Secondary· Baseline, Week 24
The change in spleen volume from baseline to week 24 was measured by magnetic resonance imaging (MRI) (or by computer tomography (CT) for participants unable to undergo MRI) and was calculated only for participants who had an evaluable spleen volume at baseline. The percentage of participants achieving a greater than or equal to 35% reduction in spleen volume from baseline to week 24 was then calculated by treatment group.
Group
Value
95% CI
Ruxolitinib
31.9
Best Available Therapy (BAT)
0
Time to First at Least 35% Reduction in Spleen Volume From Baseline by Treatment (Primary Analysis)Secondary· Time from randomization and date of the first MRI showing at least 35% reduction from baseline in spleen volume
This is defined as the interval between randomization and date of the first MRI showing at least 35% reduction from baseline in spleen volume. The analysis was performed for participants who achieved a 35% reduction in spleen volume
12 weeks
Group
Value
95% CI
Ruxolitinib
0.23
0.14 – 0.34
Best Available Therapy (BAT)
0
NA – NA
24 weeks
Group
Value
95% CI
Ruxolitinib
0.67
0.54 – 0.76
Best Available Therapy (BAT)
1
NA – NA
36 weeks
Group
Value
95% CI
Ruxolitinib
0.87
0.76 – 0.93
Best Available Therapy (BAT)
1
NA – NA
48 weeks
Group
Value
95% CI
Ruxolitinib
0.97
0.89 – 0.99
Best Available Therapy (BAT)
1
NA – NA
Progression-free Survival (PFS)Secondary· Time from randomization and the earliest of either increase in spleen volume >=25% from on-study nadir, splenic irradiation, splenectomy, leukemic transformation or death
Median of time progression free survival (95% CI), years
Group
Value
95% CI
Ruxolitinib
1.6
1.2 – 2.3
Best Available Therapy (BAT)
1.4
1.1 – 1.9
Leukemia-free Survival (LFS)Secondary· Time from randomization and earliest of either leukemia or death
Time from randomization and earliest of either (1) date of bone marrow blast count of 20% or greater; (2) date of first peripheral blast count of 20% or greater that was subsequently confirmed to sustain for at least 8 weeks; (3) date of death from any cause
Group
Value
95% CI
Ruxolitinib
NA
NA – NA
Best Available Therapy (BAT)
4.1
2.4 – NA
Overall Survival (OS)Secondary· From randomization until death from any cause
Defined as the interval between randomization and the date of the bone marrow blast count of 20% or greater OR the date of the first peripheral blast count of 20% or greater that was subsequently confirmed to have been sustained for at least 8 weeks OR the date of death from any cause, whichever occurs first. OS was summarized using Kaplan-Meier estimates for each treatment arm. The estimates were supplemented by tables of number of events and probability estimates at several timepoints
Group
Value
95% CI
Ruxolitinib
NA
NA – NA
Best Available Therapy (BAT)
4.1
2.4 – NA
Percentage of Participants With Bone Marrow Histomorphology at Week 48 (Primary Analysis)Secondary· 48 weeks
This was noted as fibrosis density and was tabulated by fibrosis grade at baseline and at week 48 (post-baseline). Descriptive statistics (participant percentages) were used.
Fibrosis grades: 0 Scattered linear reticulin with no intersections corresponding to normal bone marrow ; 1 Loose network of reticulin with many intersections, especially in perivascular areas; 2 Diffuse and dense increase in reticulin with extensive intersections, occasionally with only focal bundles of collagen and/or focal osteosclerosis; 3 Diffuse and dense increase in reticulin with extensive intersections with coar
Grade 0
Group
Value
95% CI
Ruxolitinib
2.7
Best Available Therapy (BAT)
0.0
Grade 1
Group
Value
95% CI
Ruxolitinib
7.5
Best Available Therapy (BAT)
2.7
Grade 2
Group
Value
95% CI
Ruxolitinib
8.9
Best Available Therapy (BAT)
6.8
Grade 3
Group
Value
95% CI
Ruxolitinib
24.0
Best Available Therapy (BAT)
15.1
Missing Grade
Group
Value
95% CI
Ruxolitinib
56.8
Best Available Therapy (BAT)
75.3
Bone Marrow HistomorphologySecondary· Baseline, once a year
Shift table from baseline to last available postbaseline fibrosis grade by treatment
The grade gives an indication of the activity or amount of inflammation and the stage represents the amount of fibrosis or scarring. The grade is assigned a number based on the degree of inflammation, which is usually scored from 0-4 with 0 being no activity and 3 or 4 considered severe activity
Postbaseline Grade 0
Group
Value
95% CI
Ruxolitinib
1
41.8 – 2.3
Ruxolitinib - Grade 1
1
47.9 – 1.9
Ruxolitinib - Grade 2
2
Ruxolitinib - Grade 3
1
Ruxolitinib - Missing
2
Best Available Therapy (BAT) - Grade 0
0
Best Available Therapy (BAT) - Grade 1
0
Best Available Therapy (BAT) - Grade 2
0
Best Available Therapy (BAT) - Grade 3
0
Best Available Therapy - Missing
0
Postbaseline Grade 1
Group
Value
95% CI
Ruxolitinib
0
Ruxolitinib - Grade 1
10
Ruxolitinib - Grade 2
9
Ruxolitinib - Grade 3
2
Ruxolitinib - Missing
0
Best Available Therapy (BAT) - Grade 0
0
Best Available Therapy (BAT) - Grade 1
1
Best Available Therapy (BAT) - Grade 2
0
Best Available Therapy (BAT) - Grade 3
1
Best Available Therapy - Missing
0
Postbaseline Grade 2
Group
Value
95% CI
Ruxolitinib
0
Ruxolitinib - Grade 1
2
Ruxolitinib - Grade 2
8
Ruxolitinib - Grade 3
8
Ruxolitinib - Missing
1
Best Available Therapy (BAT) - Grade 0
0
Best Available Therapy (BAT) - Grade 1
0
Best Available Therapy (BAT) - Grade 2
4
Best Available Therapy (BAT) - Grade 3
1
Best Available Therapy - Missing
0
Postbaseline Grade 3
Group
Value
95% CI
Ruxolitinib
0
Ruxolitinib - Grade 1
6
Ruxolitinib - Grade 2
19
Ruxolitinib - Grade 3
28
Ruxolitinib - Missing
2
Best Available Therapy (BAT) - Grade 0
0
Best Available Therapy (BAT) - Grade 1
0
Best Available Therapy (BAT) - Grade 2
4
Best Available Therapy (BAT) - Grade 3
8
Best Available Therapy - Missing
3
Postbaseline Missing
Group
Value
95% CI
Ruxolitinib
2
Ruxolitinib - Grade 1
2
Ruxolitinib - Grade 2
17
Ruxolitinib - Grade 3
20
Ruxolitinib - Missing
3
Best Available Therapy (BAT) - Grade 0
2
Best Available Therapy (BAT) - Grade 1
2
Best Available Therapy (BAT) - Grade 2
19
Best Available Therapy (BAT) - Grade 3
24
Best Available Therapy - Missing
4
Duration of Follow-up by TreatmentSecondary· baseline, 260 weeks (end of study)
Number of Participants with duration of Follow up
<=1 year
Group
Value
95% CI
Ruxolitinib
16
Best Available Therapy (BAT)
15
>1 year - <=2 years
Group
Value
95% CI
Ruxolitinib
21
Best Available Therapy (BAT)
10
>2 years - <=3 years
Group
Value
95% CI
Ruxolitinib
9
Best Available Therapy (BAT)
13
>3 years - <=4 years
Group
Value
95% CI
Ruxolitinib
12
Best Available Therapy (BAT)
5
>4 years - <=5 years
Group
Value
95% CI
Ruxolitinib
27
Best Available Therapy (BAT)
8
5 years
Group
Value
95% CI
Ruxolitinib
61
Best Available Therapy (BAT)
22
Adverse events — posted to ClinicalTrials.gov
Reporting threshold: 5%.
Adverse-event reports describe events observed during the trial — not all are caused by the drug.
Ruxolitinib Randomized
Serious: 51/146 (35%)
Deaths: —
Ruxolitinib Randomized + Extension Phase
Serious: 85/146 (58%)
Deaths: —
BAT Randomized
Serious: 22/73 (30%)
Deaths: —
Ruxolitinib Cross-over
Serious: 20/45 (44%)
Deaths: —
Serious adverse events (242 terms)
Reaction
System
Ruxolitinib Randomized
Ruxolitinib Randomized + E…
BAT Randomized
Ruxolitinib Cross-over
Pneumonia
Infections and infestations
—
—
—
—
Anaemia
Blood and lymphatic system disorders
—
—
—
—
Abdominal pain
Gastrointestinal disorders
—
—
—
—
Cardiac failure
Cardiac disorders
—
—
—
—
Pyrexia
General disorders
—
—
—
—
Squamous cell carcinoma of skin
Neoplasms benign, malignant and unspecified (incl cysts and polyps)
—
—
—
—
Thrombocytopenia
Blood and lymphatic system disorders
—
—
—
—
Atrial fibrillation
Cardiac disorders
—
—
—
—
Varices oesophageal
Gastrointestinal disorders
—
—
—
—
General physical health deterioration
General disorders
—
—
—
—
Bronchitis
Infections and infestations
—
—
—
—
Basal cell carcinoma
Neoplasms benign, malignant and unspecified (incl cysts and polyps)
—
—
—
—
Prostate cancer
Neoplasms benign, malignant and unspecified (incl cysts and polyps)
This was an open label, randomized study comparing the efficacy and safety of randomized 2:1 Ruxolitinib tablets versus best-available therapy, as selected by the investigator. The purpose was to compare the efficacy, safety and tolerability of Ruxolitinib (INC424/INCB018424) given twice daily to the best-available therapy, in subjects with primary myelofibrosis (PMF), post polycythemia vera myelofibrosis (PPV-MF) or post essential thrombocythemia myelofibrosis (PET-MF).
Publications & conference data
8 peer-reviewed publications reference this trial (live from Europe PMC):
NCT07498205 — Comparing Momelotinib and Ruxolitinib in People With Untreated Myelofibrosis and Low Blood Cell Counts
· Phase 4
· not yet recruiting
NCT07249346 — Dose-Expansion Study of Low Dose Post-Transplant Cyclophosphamide/Tacrolimus/Ruxolitinib for Graft-versus-Host Disease (
· Phase 2
· recruiting
NCT07311746 — Phase Ib/II Trial of Cladribine/Ruxolitinib/Venetoclax in Patients With Relapsed/Refractory T-cell Prolymphocytic Leukem
· Phase 1, PHASE2
· not yet recruiting
NCT07340138 — Study of Pelabresib add-on to Ruxolitinib in Japanese Adult Patients With Myelofibrosis
· Phase 1
· not yet recruiting
NCT07424222 — Ruxolitinib for Immune Effector Cell Associated Hemophagocytic Lymphohistiocytosis-like Syndrome (RISE)
· Phase 1
· not yet recruiting
Other recruiting trials for Myelofibrosis
Currently open trials in the same condition.
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· NA
· recruiting
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· recruiting
NCT07342712 — Clinical Trail to Evaluate the Effect of Long-term Treatment With Gecacitinib on Myelofibrosis and Gene Mutation Levels
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NCT06533813 — Clinical Epidemiology in Contemporary Patients With Myelofibrosis.
· recruiting
Other Novartis Pharmaceuticals trials
Trials by the same sponsor.
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Publications: Europe PMC API search by NCT ID, retrieved 10 June 2026
Drug + disease cross-links: matched in real time against Drug Landscape's normalised drug + company + condition tables
Sponsor: as reported to ClinicalTrials.gov by Novartis Pharmaceuticals
Last refreshed: 19 August 2019
Drug Landscape aggregates and links these public records for informational use only. Always verify against the primary source before clinical or regulatory decisions. Canonical URL: https://druglandscape.com/trial/NCT00934544.