Under 75, any sex, with Hemophilia A. 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.
Number of Participants With Inhibitory Antibodies to Factor VIII (FVIII)Primary· Baseline through end of study (53 months)
Inhibitory antibodies to Factor VIII were measured by the Nijmegen modification of the Bethesda assay. Inhibitors had to be confirmed by 2 separate assessments within a 2 to 4 week period from the central laboratory.
Group
Value
95% CI
BAX 855: Age < 2 Years
0
BAX 855: Age >= 2 to <12 Years
0
BAX 855: Age >= 12 to <17 Years
0
BAX 855: Age >= 17 Years
0
Annualized Bleed Rate (ABR) - Spontaneous BleedsPrimary· Baseline through end of study (53 months)
The ABR was assessed based upon each individual bleeding episode. A bleeding episode was defined as subjective (pain consistent with a joint bleed) or objective evidence of bleeding which may or may not require treatment with FVIII. The ABR of spontaneous bleeds was reported separately for twice weekly, PK-t R, each of the every 5 days and every 7 days treatment regimens at the time of bleed.
Fixed-dose regimen (FDR): Every 5 Days
Group
Value
95% CI
BAX 855: Age >= 12 to <17 Years
1.381
0.728 – 2.620
BAX 855: Age >= 17 Years
1.160
0.727 – 1.852
FDR: Every 7 Days
Group
Value
95% CI
BAX 855: Age >= 12 to <17 Years
0.669
0.061 – 7.377
BAX 855: Age >= 17 Years
1.992
0.822 – 4.827
FDR: Twice Weekly
Group
Value
95% CI
BAX 855: Age < 2 Years
0.614
0.154 – 2.454
BAX 855: Age >= 2 to <12 Years
0.792
0.518 – 1.210
BAX 855: Age >= 12 to <17 Years
1.439
0.942 – 2.200
BAX 855: Age >= 17 Years
1.293
0.913 – 1.832
PK-tailored regimen (PK-t R)
Group
Value
95% CI
BAX 855: Age >= 2 to <12 Years
1.078
0.450 – 2.581
BAX 855: Age >= 12 to <17 Years
1.602
0.270 – 9.486
BAX 855: Age >= 17 Years
0.868
0.365 – 2.067
Total Annualized Bleed Rate (ABR)Secondary· Baseline through end of study (53 months)
The ABR was assessed based upon each individual bleeding episode. A bleeding episode was defined as subjective (pain consistent with a joint bleed) or objective evidence of bleeding which may or may not require treatment with FVIII. Bleeding occurring at multiple locations related to the same injury (e.g., knee and ankle bleed following a fall) was counted as a single bleeding episode. Total annualized bleed rate (spontaneous and traumatic bleeding episodes) was reported.
Group
Value
95% CI
BAX 855: Age < 2 Years
1.855
± 1.000
BAX 855: Age >= 2 to <12 Years
2.370
± 3.027
BAX 855: Age >= 12 to <17 Years
3.175
± 2.797
BAX 855: Age >= 17 Years
2.426
± 3.258
Overall Hemostatic Efficacy Rating of BAX 855 for Treatment of Breakthrough Bleeding EpisodesSecondary· Baseline through end of study (53 months)
The participant or caregiver rated the overall treatment response at 24 (+/- 2) hours after the initiation of treatment using a 4-point efficacy rating scale as Excellent: Full relief of pain and cessation of objective signs of bleeding after a single infusion and no additional infusion is required for the control of bleeding; Good: Definite pain relief and/or improvement in signs of bleeding after a single infusion and possibly requires more than 1 infusion for complete resolution; Fair: Slight relief of pain and slight improvement in signs of bleeding after a single infusion and required mor
Excellent
Group
Value
95% CI
BAX 855: Age < 2 Years
3
BAX 855: Age >= 2 to <12 Years
108
BAX 855: Age >= 12 to <17 Years
98
BAX 855: Age >= 17 Years
229
Good
Group
Value
95% CI
BAX 855: Age < 2 Years
3
BAX 855: Age >= 2 to <12 Years
66
BAX 855: Age >= 12 to <17 Years
49
BAX 855: Age >= 17 Years
250
Fair
Group
Value
95% CI
BAX 855: Age < 2 Years
0
BAX 855: Age >= 2 to <12 Years
5
BAX 855: Age >= 12 to <17 Years
7
BAX 855: Age >= 17 Years
36
None
Group
Value
95% CI
BAX 855: Age < 2 Years
0
BAX 855: Age >= 2 to <12 Years
0
BAX 855: Age >= 12 to <17 Years
1
BAX 855: Age >= 17 Years
3
Not Reported
Group
Value
95% CI
BAX 855: Age < 2 Years
0
BAX 855: Age >= 2 to <12 Years
13
BAX 855: Age >= 12 to <17 Years
13
BAX 855: Age >= 17 Years
26
BAX 855 Infusions Needed to Treat Bleeding EpisodesSecondary· Baseline through end of study (53 months)
The BAX 855 infusions to treat each bleeding episode was determined by the participant, the participant's caregiver, and/or investigator, and was based upon the participant's response to treatment. A bleeding episode was defined as subjective (pain consistent with a joint bleed) or objective evidence of bleeding which may or may not require treatment with FVIII.
Group
Value
95% CI
BAX 855: Age < 2 Years
1.3
± 0.52
BAX 855: Age >= 2 to <12 Years
1.4
± 1.14
BAX 855: Age >= 12 to <17 Years
1.4
± 1.81
BAX 855: Age >= 17 Years
1.4
± 1.10
Total Time Intervals Between Bleeding EpisodesSecondary· Baseline through end of study (53 months)
The time interval between bleeding episodes was calculated based upon the date and time reported for each bleeding episode. A bleeding episode was defined as subjective (pain consistent with a joint bleed) or objective evidence of bleeding which may or may not require treatment with FVIII.
Group
Value
95% CI
BAX 855: Age < 2 Years
5.700
4.074 – 7.327
BAX 855: Age >= 2 to <12 Years
5.051
0.756 – 14.867
BAX 855: Age >= 12 to <17 Years
5.232
1.228 – 14.571
BAX 855: Age >= 17 Years
5.818
0.617 – 22.686
Average Dose of BAX 855 Per Prophylactic InfusionSecondary· Baseline through end of study (53 months)
The average dose of BAX 855 per prophylactic infusion was reported.
Group
Value
95% CI
BAX 855: Age < 2 Years
50.748
± 11.312
BAX 855: Age >= 2 to <12 Years
53.855
± 7.754
BAX 855: Age >= 12 to <17 Years
53.356
± 10.344
BAX 855: Age >= 17 Years
49.727
± 8.677
Number of Participants With Adverse Events (AEs) and Serious Adverse Events (SAEs)Secondary· Baseline through end of study (53 months)
An AE was any unfavorable and unintended sign (eg, an abnormal laboratory finding), symptom (eg, rash, pain, discomfort, fever, dizziness, etc.), disease (eg, peritonitis, bacteremia, etc.), or outcome of death temporally associated with the use of an investigational product (IP), whether or not considered causally related to the IP. A serious adverse event (SAE) was defined as an untoward medical occurrence that at any dose met one or more of the following criteria: outcome was fatal/resulted in death; was life-threatening; required inpatient hospitalization or resulted in prolongation of an
AE
Group
Value
95% CI
BAX 855: Age < 2 Years
3
BAX 855: Age >= 2 to <12 Years
52
BAX 855: Age >= 12 to <17 Years
18
BAX 855: Age >= 17 Years
101
SAE
Group
Value
95% CI
BAX 855: Age < 2 Years
0
BAX 855: Age >= 2 to <12 Years
7
BAX 855: Age >= 12 to <17 Years
4
BAX 855: Age >= 17 Years
22
Change From Baseline in Body TemperatureSecondary· Baseline, end of study (53 months)
Change in body temperature at pre-infusion and post-infusion at end of the study was reported. In the below table, FDR refers to fixed dose regimen, PK-tR refers to PK tailored regimen at the time of sampling.
FDR: Pre-Infusion
Group
Value
95% CI
BAX 855: Age < 2 Years
-0.23
± 0.208
BAX 855: Age >= 2 to <12 Years
-0.05
± 0.386
BAX 855: Age >= 12 to <17 Years
-0.08
± 0.409
BAX 855: Age >= 17 Years
-0.01
± 0.376
FDR: Post-Infusion
Group
Value
95% CI
BAX 855: Age < 2 Years
-0.07
± 0.306
BAX 855: Age >= 2 to <12 Years
-0.03
± 0.394
BAX 855: Age >= 12 to <17 Years
0.03
± 0.375
BAX 855: Age >= 17 Years
-0.02
± 0.395
PK-tR: Pre-Infusion
Group
Value
95% CI
BAX 855: Age >= 2 to <12 Years
0.28
± 0.255
BAX 855: Age >= 12 to <17 Years
-0.08
± 0.189
BAX 855: Age >= 17 Years
-0.10
± 0.595
PK-tR: Post-Infusion
Group
Value
95% CI
BAX 855: Age >= 2 to <12 Years
0.13
± 0.362
BAX 855: Age >= 12 to <17 Years
0.03
± 0.263
BAX 855: Age >= 17 Years
0.01
± 0.593
Change From Baseline in Pulse RateSecondary· Baseline, end of study (53 months)
Change in pulse rate at pre-infusion and post-infusion at end of the study was reported. In the below table, FDR refers to fixed dose regimen, PK-tR refers to PK tailored regimen at the time of sampling.
FDR: Pre-Infusion
Group
Value
95% CI
BAX 855: Age < 2 Years
-20.3
± 21.22
BAX 855: Age >= 2 to <12 Years
-0.1
± 14.31
BAX 855: Age >= 12 to <17 Years
-7.7
± 9.07
BAX 855: Age >= 17 Years
-0.4
± 11.67
FDR: Post-Infusion
Group
Value
95% CI
BAX 855: Age < 2 Years
-13
± 19.47
BAX 855: Age >= 2 to <12 Years
2.4
± 16.72
BAX 855: Age >= 12 to <17 Years
-6.2
± 8.55
BAX 855: Age >= 17 Years
-1
± 10.07
PK-tR: Pre-Infusion
Group
Value
95% CI
BAX 855: Age >= 2 to <12 Years
0.1
± 9.13
BAX 855: Age >= 12 to <17 Years
-1.8
± 13.91
BAX 855: Age >= 17 Years
4.0
± 9.15
PK-tR: Post-Infusion
Group
Value
95% CI
BAX 855: Age >= 2 to <12 Years
-8.1
± 14.94
BAX 855: Age >= 12 to <17 Years
-4.5
± 12.40
BAX 855: Age >= 17 Years
-0.2
± 7.31
Change From Baseline in Respiratory RateSecondary· Baseline, end of study (53 months)
Change in respiratory rate at pre-infusion and post-infusion at end of the study was reported. In the below table, FDR refers to fixed dose regimen, PK-tR refers to PK tailored regimen at the time of sampling.
FDR: Pre-Infusion
Group
Value
95% CI
BAX 855: Age < 2 Years
-6.3
± 4.73
BAX 855: Age >= 2 to <12 Years
-0.8
± 3.97
BAX 855: Age >= 12 to <17 Years
-1.3
± 1.67
BAX 855: Age >= 17 Years
0.4
± 2.85
FDR: Post-Infusion
Group
Value
95% CI
BAX 855: Age < 2 Years
-6.3
± 4.73
BAX 855: Age >= 2 to <12 Years
-1.3
± 3.55
BAX 855: Age >= 12 to <17 Years
-1.5
± 1.85
BAX 855: Age >= 17 Years
0.2
± 2.88
PK-tR: Pre-Infusion
Group
Value
95% CI
BAX 855: Age >= 2 to <12 Years
1.5
± 7.01
BAX 855: Age >= 12 to <17 Years
-3.5
± 5.74
BAX 855: Age >= 17 Years
0.2
± 2.79
PK-tR: Post-Infusion
Group
Value
95% CI
BAX 855: Age >= 2 to <12 Years
0.4
± 5.73
BAX 855: Age >= 12 to <17 Years
-3.3
± 5.85
BAX 855: Age >= 17 Years
0.3
± 2.55
Change From Baseline in Blood PressureSecondary· Baseline, end of study (53 months)
Change in systolic and diastolic blood pressure at pre-infusion and post-infusion at end of the study were reported. In the below table, FDR refers to fixed dose regimen, PK-tR refers to PK tailored regimen at the time of sampling, SBP refers to systolic blood pressure, DBP refers to diastolic blood pressure.
SBP - FDR: Pre-Infusion
Group
Value
95% CI
BAX 855: Age < 2 Years
-2.7
± 1.53
BAX 855: Age >= 2 to <12 Years
4.5
± 11.82
BAX 855: Age >= 12 to <17 Years
4.0
± 9.25
BAX 855: Age >= 17 Years
1.8
± 12.87
SBP - FDR: Post-Infusion
Group
Value
95% CI
BAX 855: Age < 2 Years
-8.7
± 8.50
BAX 855: Age >= 2 to <12 Years
3
± 11.49
BAX 855: Age >= 12 to <17 Years
2.7
± 8.65
BAX 855: Age >= 17 Years
-1.4
± 12.08
SBP - PK-tR: Pre-Infusion
Group
Value
95% CI
BAX 855: Age >= 2 to <12 Years
0.9
± 8.04
BAX 855: Age >= 12 to <17 Years
3.5
± 9.15
BAX 855: Age >= 17 Years
1.0
± 14.54
SBP - PK-tR: Post-Infusion
Group
Value
95% CI
BAX 855: Age >= 2 to <12 Years
-1.8
± 8.61
BAX 855: Age >= 12 to <17 Years
3.8
± 6.4
BAX 855: Age >= 17 Years
4.9
± 15.14
DBP - FDR: Pre-Infusion
Group
Value
95% CI
BAX 855: Age < 2 Years
0.7
± 8.02
BAX 855: Age >= 2 to <12 Years
1.8
± 9.73
BAX 855: Age >= 12 to <17 Years
1.4
± 9.69
BAX 855: Age >= 17 Years
1.8
± 8.66
DBP - FDR: Post-Infusion
Group
Value
95% CI
BAX 855: Age < 2 Years
5.3
± 8.74
BAX 855: Age >= 2 to <12 Years
3
± 9.72
BAX 855: Age >= 12 to <17 Years
0.3
± 6.43
BAX 855: Age >= 17 Years
0.4
± 9.21
DBP - PK-tR: Pre-Infusion
Group
Value
95% CI
BAX 855: Age >= 2 to <12 Years
2.3
± 9.65
BAX 855: Age >= 12 to <17 Years
0.5
± 10.28
BAX 855: Age >= 17 Years
1.5
± 7.90
DBP - PK-tR: Post-Infusion
Group
Value
95% CI
BAX 855: Age >= 2 to <12 Years
-2.4
± 6.67
BAX 855: Age >= 12 to <17 Years
-2.3
± 7.68
BAX 855: Age >= 17 Years
-0.9
± 7.93
Adverse events — posted to ClinicalTrials.gov
Time frame: From start of study drug administration up to 53 months.
Reporting threshold: 5%.
Adverse-event reports describe events observed during the trial — not all are caused by the drug.
BAX 855: Age < 2 Years
Serious: 0/3 (0%)
Deaths: 0/3
BAX 855: Age >= 2 to <12 Years
Serious: 7/62 (11%)
Deaths: 0/62
BAX 855: Age >= 12 to <17 Years
Serious: 4/26 (15%)
Deaths: 1/26
BAX 855: Age >= 17 Years
Serious: 22/125 (18%)
Deaths: 0/125
Serious adverse events (43 terms)
Reaction
System
BAX 855: Age < 2 Years
BAX 855: Age >= 2 to <12 Y…
BAX 855: Age >= 12 to <17 …
BAX 855: Age >= 17 Years
Haemarthrosis
Musculoskeletal and connective tissue disorders
—
—
—
—
Haematoma
Vascular disorders
—
—
—
—
Pancreatitis
Gastrointestinal disorders
—
—
—
—
Pyrexia
General disorders
—
—
—
—
Pneumonia
Infections and infestations
—
—
—
—
Urinary tract infection
Infections and infestations
—
—
—
—
Anaemia
Blood and lymphatic system disorders
—
—
—
—
Splenic haematoma
Blood and lymphatic system disorders
—
—
—
—
Muscle haemorrhage
Musculoskeletal and connective tissue disorders
—
—
—
—
Metastases to lung
Neoplasms benign, malignant and unspecified (incl cysts and polyps)
—
—
—
—
Renal cancer metastatic
Neoplasms benign, malignant and unspecified (incl cysts and polyps)
To continue the evaluation of the safety and efficacy of BAX 855 for prophylaxis and treatment of bleeding episodes in adult and pediatric previously treated patients (PTPs) aged ≤ 75 years of age with severe hemophilia A.
Publications & conference data
5 peer-reviewed publications reference this trial (live from Europe PMC):
NCT07416526 — A Clinical Study to Evaluate the Effects of NXT007 Compared to Factor VIII Prophylaxis in Participants With Hemophilia A
· Phase 3
· recruiting
NCT07416604 — A Clinical Study to Evaluate the Effects of NXT007 Compared to Emicizumab Prophylaxis in People With Hemophilia A
· Phase 3
· recruiting
NCT07523399 — Joint Health, Balance and Quality of Life in Adults With Hemophilia A
· recruiting
NCT06833983 — To Evaluate the Clinical Study of GS1191-0445 Injection in the Treatment of Hemophilia A
· Phase 3
· recruiting
NCT06579144 — Pharmacokinetic Comparison of Efanesoctocog Alfa vs Other EHL-rFVIII Products in Participants With Severe Haemophilia A
· Phase 1
· recruiting
Other Baxalta now part of Shire trials
Trials by the same sponsor.
NCT04985682 — A Study of ADVATE in People With Hemophilia A in India
· Phase 4
· completed
NCT04578535 — A Study to Assess the Tolerability, Safety, and Pharmacokinetics of Subcutaneous Immune Globulin Infusion 10% (Human) Wi
· Phase 1
· completed
NCT04346108 — A Study of Immune Globulin Subcutaneous (Human), 20% Solution (IGSC, 20%) in Japanese Participants With Primary Immunode
· Phase 3
· completed
NCT04158934 — A Long-term Study of ADYNOVI/ADYNOVATE in Participants With Haemophilia A
· active not recruiting
NCT04394286 — A Phase 1/2 Study of SHP648, an Adeno-Associated Viral Vector for Gene Transfer in Hemophilia B Subjects
· Phase 1, PHASE2
· terminated
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 Baxalta now part of Shire
Last refreshed: 24 May 2021
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/NCT01945593.