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Clinical Study Synopsis This Clinical Study Synopsis is provided for patients and healthcare professionals to increase the transparency of Bayer's clinical research. This document is not intended to replace the advice of a healthcare professional and should not be considered as a recommendation. Patients should always seek medical advice before making any decisions on their treatment. Healthcare Professionals should always refer to the specific labelling information approved for the patient's country or region. Data in this document or on the related website should not be considered as prescribing advice. The study listed may include approved and non-approved formulations or treatment regimens. Data may differ from published or presented data and are a reflection of the limited information provided here. The results from a single trial need to be considered in the context of the totality of the available clinical research results for a drug. The results from a single study may not reflect the overall results for a drug. The following information is the property of Bayer AG. Reproduction of all or part of this report is strictly prohibited without prior written permission from Bayer AG. Commercial use of the information is only possible with the written permission of the proprietor and is subject to a license fee. Please note that the General Conditions of Use and the Privacy Statement of bayer.com apply to the contents of this file.
Clinical Trial Results Synopsis
20-NOV-2017 Study no. 15653 Page: 1 of 13
Date of study report: 19 JUL 2017
Study title: A controlled, parallel group, open-label, multicenter extension study to
investigate efficacy and safety of oral BAY 85-3934 and darbepoetin alfa
comparator in the long-term treatment of anemia in pre-dialysis subjects
with chronic kidney disease in Europe and Asia Pacific
Sponsor’s study number:
15653
NCT number: NCT02055482
EudraCT number: 2013-001190-24
Sponsor: Bayer
Clinical phase: II
Study objectives: Study objectives were assessed in pre-dialysis subjects with anemia of
chronic kidney disease (CKD) for a period of up to 36 months in the Main
Phase of this study.
Primary objectives
The primary objectives of this study were the following:
To evaluate efficacy of treatment with BAY85-3934 compared
with darbepoetin as measured by the change from baseline to post-
baseline time points in hemoglobin (Hb) levels
To evaluate safety and tolerability of treatment with BAY85-3934
compared with darbepoetin by events of special interest,
adjudicated serious adverse events (SAEs), and SAEs.
Secondary objectives
The secondary objectives of this study were the following:
To evaluate other efficacy variables of treatment with BAY85-
3934 compared with darbepoetin
To evaluate other safety variables of treatment with BAY85-3934
compared with darbepoetin.
Clinical Trial Results Synopsis
20-NOV-2017 Study no. 15653 Page: 2 of 13
Test drug: Molidustat (BAY85-3934)
Name of active ingredient(s):
BAY85-3934
Dose: Dose during Hb Stabilization (HbS) Phase
Fixed initial doses of BAY85-3934 (OD dose) were administered and then
titrated at each scheduled visit to maintain Hb in the target range of 10.0
to 12.0 g/dL.
Dose during Main Phase
Based on the subject’s Hb response and tolerability of previous dose,
IXRS assigned the adapted dose for each subject for BAY85-3934.
Available dose regimens included 0, 15, 25, 50, 75, 100, and 150 mg.
Route of administration:
Oral
Duration of treatment: Up to a maximum of 36 months
Reference drug: Darbepoetin alfa (hereafter called darbepoetin)
Dose: Darbepoetin was administered according to the local label and titrated at
the scheduled DC visits.
Route of administration:
Intravenous (IV) or subcutaneous (SC)
Duration of treatment: Up to a maximum of 36 months
Indication: Anemia of CKD or renal anemia
Clinical Trial Results Synopsis
20-NOV-2017 Study no. 15653 Page: 3 of 13
Diagnosis and main criteria for inclusion:
Subjects eligible for inclusion into the study had to meet all of the
following inclusion criteria listed below:
Men; women without childbearing potential, defines as (a)
postmenopausal women (women with 12 months of spontaneous
amenorrhea or with 6 months of spontaneous amenorrhea and
serum follicle stimulating hormone concentration > 30 millimeters
international unit / milliliter [mIU/mL]) (b) women with bilateral
tubal ligation, (c) women with bilateral ovarectomy, or (d) women
with hysterectomy
Not on dialysis at study entry
Ability to understand and follow study-related instructions as a
documented decision of the investigator.
Inclusion criteria for inclusion into the HbS Phase
Subjects who:
Received BAY85-3934 or placebo in Study 15141 and reached a
stopping event, or
Completed 16 weeks of treatment with BAY85-3934 in Study
15141 or 15261 but had a mean Hb from the evaluation period
outside the target range of 10.0 to 12.0 g/dL or
Completed 16 weeks of treatment with placebo in Study 15141
and were re-assessed within 4 weeks after end of treatment (EoT)
visit as eligible for the HbS Phase of Study 15653 (this extension
study).
Inclusion criteria for inclusion into the Main Phase
Mean Hb concentration at 10.0 to 12.0 g/dL during the evaluation
period of parent study for subjects who:
o Completed 16 weeks of treatment (BAY85-3934 arm) in
Study 15141, or
o Completed 16 weeks of treatment (BAY85-3934 or
darbepoetin arm) in Study 15261 without dose suspension
lasting > 6 consecutive weeks, or
HbS Phase subject (BAY85-3934 or darbepoetin arm) in Study
15653 (this extension study):
o Had mean Hb concentration of 10.0 to 12.0 g/dL for at least 2
consecutive visits after HbS Phase Visit 2, and
o Did not have a dose suspension lasting > 6 consecutive weeks
in the HbS Phase.
Clinical Trial Results Synopsis
20-NOV-2017 Study no. 15653 Page: 4 of 13
Study design: This is a controlled, parallel group, open-label, multicenter study
Methodology: Two concurrent phases were included for this study: HbS Phase (up to 16
weeks) and Main Phase (up to 36 months).
Subjects treated with placebo in Study 15141 received darbepoetin in this
study.
Hb Stabilization Phase overview
The initial study drug dose in the HbS Phase was based on the Hb level at
the time of the subject’s stopping event or the average Hb levels during
the last 4-week evaluation period if mean Hb was not within 10.0 to 12.0
g/dL, as well as the total daily dose level in Study 15141 or Study 15261.
After the first dose control (DC) visit in this extension study, Hb was
checked every 2 weeks in the HbS Phase.
Main Phase overview
Dose assessments were made every 4 (± 1) weeks. At the scheduled visits,
interactive voice / web response system (IXRS) assigned an adapted dose
regimen for BAY 85-3934 and darbepoetin [according to the local label]
for the subject to take for the next 4 weeks of treatment to achieve and
maintain Hb levels at 10.0 to 12.0 g/dL. In exceptional cases, the
investigator could intervene in the dose decision based on his / her clinical
judgment.
Measurements from portable Hb devices were prohibited in the study.
Safety laboratory parameters, heart rate (HR), blood pressure (BP),
adverse events (AEs), and concomitant medications were monitored
regularly throughout the study.
Subjects who required administration of rescue treatment (e.g., red blood
cell [RBC] containing transfusion, phlebotomy, or administration of a
marked erythropoiesis-stimulating agent [ESA] treatment) were
permanently discontinued from the study drug. Subjects who required
hemodialysis during the study were not excluded.
Three oversight committees were employed for this study, a steering
committee, a data monitoring committee (DMC), and a central
adjudication committee (CAC).
Study center(s): 50 active centers overall that enrolled subjects in 12 countries. The
participating countries were (number of centers in brackets): Bulgaria (6),
France (3), Germany (2), Hungary (5), Israel (2), Italy (6), Japan (10),
Poland (3), Republic of Korea (4), Romania (4), Spain (3), and United
Kingdom (2).
Clinical Trial Results Synopsis
20-NOV-2017 Study no. 15653 Page: 5 of 13
Publication(s) based on the study (references):
None at the time of report creation
Study period: Study Start Date: 24 JUN 2014
Study Completion Date: 12 DEC 2016
Early termination: Yes. The study was terminated early as the study size did not meet the
Regulatory Agency requirements to assess long-term treatment (safety) in
this product class.
Number of subjects: Planned: 190 subjects in BAY85-3934 group
50 subjects in darbepoetin group
Analyzed: 164 subjects
Criteria of evaluation:
Efficacy: Primary efficacy variable
Change in local laboratory Hb level from baseline of the Main Phase to
each post-baseline visit.
Secondary efficacy variables
Responders in Hb levels: The response defined as meeting all 3 of
the following criteria (Hb levels from local laboratory):
o Mean of Hb levels in the target range of 10.0 to 12.0 g/dL
inclusive during the Main Phase
o ≥ 50% of the Hb levels in the target range of 10.0 to 12.0 g/dL
inclusive during the Main Phase
o No RBC-containing transfusion during the active treatment.
Time within Hb target range (10.0 to 12.0 g/dL inclusive) during
study treatment measured as number of days and percentage of
time in range (defined as number of days in target range / number
of days on treatment)
Number of subjects meeting specific Hb criteria
Subjects with Hb values >13 g/dL or having excessive Hb increase
Duration of exposure, defined as duration in days between first
dose date and last dose date
Number and percentage of subjects requiring down-titration
Clinical Trial Results Synopsis
20-NOV-2017 Study no. 15653 Page: 6 of 13
Number and percentage of subjects requiring up-titration
Change from baseline in
o Reticulocyte counts
o Red blood cell (RBC) count and hematocrit (HcT)
o Central laboratory Hb
Safety: The following primary safety variables were evaluated:
o Adjudicated serious adverse events (SAEs): death and SAEs of the
following events: severe arrhythmias, thromboembolic events
(excluding hemodialysis vascular access events: arteriovenous
shunt / fistula and arteriovenous graft events), syncope,
symptomatic hypotension, and heart failure
o Events of special interest: liver function-related AEs, including
abnormal liver function tests and any hospitalization
o SAEs.
The following secondary safety variables were evaluated:
o Non-serious adverse events (AEs)
o HR and BP (at all time points and as change from baseline in this
study)
o Laboratory examinations: hematology, international normalized
ratio, Quick / prothrombin time (PT), partial thromboplastin time
(PTT), C-reactive protein (CRP), and chemistry, especially alanine
aminotransferase (ALT), aspartate aminotransferase (AST),
bilirubin, electrolytes, amylase, and lipase.
Statistical methods: Tables displayed the results for each treatment group, as well as overall
for the specified analysis population. As a general concept, data were
displayed as measured at each scheduled visit and the individual changes
as compared to baseline. A change was always calculated as post-baseline
value minus baseline value.
Population characteristics were summarized for modified intent-to-treat
(mITT) and safety (SAF) datasets for the Main Phase of the study and the
HbS safety set (HbSS) for the Hb Stabilization Phase.
As this is an extension study, both efficacy and safety analyses were based
on actual treatment received (BAY 85-3934 or darbepoetin). Additionally,
data from all BAY 85-3934 treatment groups were pooled for analysis of
efficacy and safety.
Clinical Trial Results Synopsis
20-NOV-2017 Study no. 15653 Page: 7 of 13
Efficacy:
The primary efficacy variable was the change in local laboratory Hb level
from baseline in the Main Phase to each post-baseline visit in the Main
Phase.
The primary efficacy endpoint was descriptively summarized by treatment
at each post baseline visit, along with 95% confidence intervals (CIs) for
mean and percent changes. In addition, mean difference (95% CI)
between BAY 85-3934 combined dose group and comparator group was
presented. Absolute Hb values at each visit including baseline visit was
also descriptively summarized.
Mean (with variation indicator) plots summarizing change from baseline
over time was provided.
In support of the above descriptive summaries, inferential analyses such
as constrained longitudinal data analysis (cLDA) were conducted.
Secondary efficacy analyses were descriptively summarized and defined
in the statistical analysis plan (SAP).
Analyses on changes of the following measures from baseline in parent
study were not performed in this report: Reticulocyte count, RBC count
and Hct, central laboratory Hb, HR, BP and 12-lead ECG data.
Safety:
Analyses on primary safety and tolerability were performed on the safety
analysis set defined as All subjects who received at least 1 dose of study
medication during the Main Phase. Descriptive summaries were provided
by treatment. Adverse events were coded using the Medical Dictionary for
Regulatory Activities version 19.1
Substantial protocol changes:
Global Amendment 1, dated 30 OCT 2014
To improve study feasibility and safety monitoring, Day 8HbS
visit was removed and the subjects from Study 15141 who had an
Hb stopping event after Day 15 in that study were added to the
safety monitoring at Day 15HbS visit
Heart failure was added to the list of adjudicated AEs , ECG
assessments were reduced from triplicate to single measurements
Statement of prescribed continuous dosing of acetaminophen /
paracetamol is not allowed was included in the protocol
Atrial fibrillation as an exclusion criterion was removed
Clarification on time separation of intake of BAY 85-3934 and
breast cancer resistant protein substrates.
Clinical Trial Results Synopsis
20-NOV-2017 Study no. 15653 Page: 8 of 13
Local Amendment 2, dated 19 NOV 2014
Protocol Amendment 2 which was a local amendment for UK and South
Korea only was dated on 19 NOV 2014 (version 2.0). The purpose of this
amendment was revised upon the request of regulatory authorities.
As the results of Segment I toxicological studies on male fertility have
become available, the male contraceptive requirements were removed as
per the integrated global protocol Amendment 1. Per local request from
competent authorities, the male contraceptive requirements were re-
instated.
Global Amendment 3, dated 24 NOV 2015
A discrepancy was identified between the BAY 85-3934 dose titrations
(dose increase, dose decrease, and dose suspension) described in the
protocol and those utilized in the IXRS system. The IXRS system has
been programmed to allow dose suspension in case of high Hb (Hb > 11.7
g/dL), which was not consistently applied everywhere in the protocol text.
For some sections, language was added to the protocol to add clarity to
dose suspension recommended by IXRS.
Subject disposition and baseline
A total of 166 subjects who were previously screened and signed informed consent in the parent
studies (15141 and 15261) were included in this extension trial. However, the data of 2 subjects who
were randomized were excluded from all analyses as a result of an audit in Poland concluding a
serious breach of compliancy issues. Thus, 164 subjects were analyzed in 15653.
Of the 164 subjects, 67 (40.9%) subjects entered the HbS Phase, 97 (59.1%) subjects were included
directly in the Main Phase, and 47 of 67 subjects (70.1%) rolled over from HbS Phase to Main
Phase.
HbS Phase
Sixty-seven subjects entered the HbS Phase, 4 (6.0%) did not receive any treatment, while 63
(94.0%) subjects were treated; 46 assigned to BAY85-3934 and 17 assigned to darbepoetin (these
previous placebo subjects were treated with ESA for the first time). Four non-treated subjects
discontinued the HbS Phase due to protocol driven decision point and a protocol violation. There
was an imbalance of discontinuations between groups; 18 (36.7%) subjects on BAY 85-3934 and 2
(11.1%) subjects on darbepoetin. Primary reasons for discontinuation were AE (6 subjects, 30.0%)
and protocol driven decision point (5 subjects, 25.0%). Two subjects withdrew treatment due to a
lack of efficacy.
Main Phase
A total of 144 subjects were treated; 103 assigned to BAY85-3934 and 41 assigned to darbepoetin.
All subjects discontinued treatment, primary reason being termination of the study per sponsor’s
Clinical Trial Results Synopsis
20-NOV-2017 Study no. 15653 Page: 9 of 13
decision (87 subjects, 60.4%). Other main reasons included AE (21 subjects, 14.6%) and protocol
driven decision point (19 subjects, 13.2%).
Follow-up
The proportion of subjects completing follow-up was similar between BAY85-3934 (82.2%) and
darbepoetin (73.8%) treatment groups.
Analysis sets
There were 3 datasets used in this study.
mITT: All subjects who received at least 1 dose of study medication during the Main Phase and had
at least 1 post-baseline Hb value in the Main Phase (n=144). This population was the primary dataset
for efficacy evaluation of subjects in the Main Phase.
SAF: All subjects who received at least 1 dose of study medication during the Main Phase (n=144).
This population was the primary dataset for safety evaluation of subjects in the Main Phase.
HbSS: All subjects who received at least 1 dose of study medication during HbS Phase (n=63). This
population was used to analyze and describe the effect observed in the stabilization phase only.
Subjects who entered the Main Phase directly were excluded from this population.
When analyzing data for the overall period, the mITT and HbSS combined population was used
(n=160). The HbSS and SAF combined population was used for analyzing safety data for the overall
period (n=160).
Demographics
Overall, the treatment groups were well-balanced with respect to demographics presented. The mean
age was similar with BAY 85-3934 and darbepoetin (69.6 years and 68.5 years, respectively), as was
the gender with male (48.3% and 52.4% respectively) and female participants (51.7% and 47.6%
respectively). More than half of subjects in each treatment arm were White while a single subject in
the darbepoetin group was Black. Under the BAY 85-3934 arm, the proportion of subjects who were
Asian and Japanese (38.1% and 27.1% respectively) was higher compared to subjects in the
darbepoetin group (21.4% and 11.9% respectively). Of the 160 subjects, only 4 were Hispanic or
Latino and the ethnicity for 3 subjects was unknown. Diabetes mellitus (59 subjects, 36.9%) and
hypertension (63 subjects, 39.4%) were the most frequently reported CKD etiology, which was also
highlighted for each parent study. Other CKD etiologies were reported for < 10% of total subjects.
Both groups were comparable in their mean eGFR values; BAY 85-3934: 23.41 mL/min/1.73m2 and
darbepoetin: 22.04 mL/min/1.73m2.
Efficacy evaluation
Change in local laboratory Hb level from baseline of the Main Phase to each post-baseline visit
in the Main Phase
In this open-label extension study where subjects were randomized in the parent trials 15141 and
15261, results of the primary efficacy variable of change in local laboratory Hb level from baseline
defined as:
Clinical Trial Results Synopsis
20-NOV-2017 Study no. 15653 Page: 10 of 13
i) as the average of scheduled Hb values from parent study visit 9-12 (evaluation period) for
subjects entering the Main Phase directly
ii) or defined as the average of values in HbS Phase used for inclusion into Main Phase (i.e.,
the last 2 clinical visits reported in the IXRS system) for subjects entering Main Phase
from HbS Phase
to each post-baseline visit using the mITT population demonstrated that BAY 85-3934 maintained
Hb levels in pre-dialysis subjects who had renal anemia due to CKD. The effect of BAY85-3934 on
the maintenance of Hb levels in CKD subjects was similar to that of darbepoetin. The mean change
from baseline at most visits was < 0.5 g/dL in both treatment groups. Mean local Hb levels were
maintained within the target range of 10.0 to 12.0 g/dL during the treatment period at all visits
except Week 108 for both BAY 85-3934 and darbepoetin groups due to study termination by the
sponsor. At Week 108, only 3 subjects in total were evaluable for local Hb assessment and therefore
the maintenance of Hb beyond 1 year could not be assessed. Mean (SD) local Hb values during
treatment were 11.10 (0.508) g/dL in the BAY 85-3934 group and 10.98 (0.571) g/dL in the
darbepoetin group.
Consistent results for the change in Hb levels from baseline were observed in the observed case and
last observation carried forward analyses. Furthermore, the sensitivity analysis conducted using
central Hb levels confirmed the results with local Hb levels demonstrating high correlation.
Responders in Hb levels
For the secondary variables, responder rate defined by 3 criteria was higher in the BAY85-3934
group than in the darbepoetin group; 95.1% versus 87.8% of subjects respectively had mean Hb
levels within target range of 10.0 to 12.0 g/dL, 92.2% and 87.8% of subjects respectively had ≥ 50%
of mean Hb within the target range, and 93.2% and 87.8% of subjects respectively had no RBC-
containing transfusion during treatment.
Time within Hb target range
The mean length of time spent within the Hb target range was similar between BAY 85-3934 and
darbepoetin (325.18 days versus 331.74 days respectively). The percentage of time spent in the
target range was also similar between the groups (80.68% versus 78.11% respectively).
At EoT, less than 22% of total subjects in each treatment group were either below or above target
range. The proportion of subjects meeting any of the 4 out of range specific local Hb criteria (i.e.
>50% of Hb levels < 10.0 g/dL, or > 12.0 g/dL, or mean Hb levels < 10.0 g/dL, or > 12.0 g/dL) was
lower in the BAY 85-3934 group compared to the darbepoetin group. The percentage of subjects
with Hb > 13.0 g/dL at any time was numerically higher for darbepoetin subjects compared to BAY
85-3934 subjects (12.2% versus 9.7% respectively). On the contrary, those subjects that had an
excessive increase > 2 g/dL over 4-week period all occurred in the BAY 85-3934 arm only (5 [4.9%]
subjects versus none).
Clinical Trial Results Synopsis
20-NOV-2017 Study no. 15653 Page: 11 of 13
Number of subjects meeting specific Hb criteria
Four criteria were defined for this endpoint (all occurring during the Main phase):
1. >50% of Hb levels below the lower limit
of 10.0 g/dL
3. >50% of Hb levels above the upper limit of
12.0 g/dL
2. Mean of Hb levels below the lower limit of
10 g/dL
4. Mean of Hb levels above the upper limit of
12.0 g/dL
The proportion of subjects meeting any of the critical or failing criteria was lower in the
BAY85-3934 group compared to the darbepoetin group. The number of subjects meeting each
criterion was generally low for either group, i.e. 6 subjects or less. The biggest difference between
the two groups was noted for criterion #2 (mean of Hb levels below the lower limit of 10.9 g/dL);
2.9% with BAY85-3934 and 7.3% with darbepoetin.
Subjects with Hb values >13 g/dL or having excessive Hb increase
Excessive Hb increased was defined as an increase of >2.0 g/dL over a 4-week period at any time
during the treatment period or a rise of >1.0 g/dL in 2 weeks. The rate of overshoot was comparable
between the two treatment groups, with 12.6% of subjects in BAY85-3934 group and 12.2% of
subjects in the darbepoetin group meeting any of the 2 criteria (Hb > 13 g/dL and Hb increased > 2
g/dL in 4-week period). Hb >13 g/dL was experienced by 9.7% of subjects in BAY85-3934 group
and 12.2% of subjects in the darbepoetin group. Excessive increase with >2 g/dL over 4 weeks
occurred only in the BAY85-3934 group (4.9% of subjects).
Duration of exposure
Treatment duration for the Main Phase was defined as date of last study drug (EoT date) - date of
first study drug + 1. If 0 mg occurred during the treatment period, but not as the last dose, then the
suspension period was included.
Mean treatment duration was similar for BAY85-3934 and darbepoetin groups (399.8 ± 185.92 and
414.6 ± 205.63 days, respectively).The minimum duration of exposure to BAY85-3934 was 26
days and maximum was 760 days.
Number and percentage of subjects requiring dose titration
The proportion of subjects requiring up or down-titrations during the Main phase was also similar
between the groups. Up-titrations were reported for 61.2% and 58.5% of subjects in the BAY85-
3934 and darbepoetin groups, respectively, and down-titrations were reported for 59.2% and 48.8%
of subjects in the BAY85-3934 and darbepoetin groups, respectively. On the other hand, a larger
proportion of subjects in BAY85-3934 group had dose suspensions compared to subjects in the
darbepoetin group (37.9% vs. 7.3%, respectively).
Change from baseline in reticulocyte, Hct and RBC counts and central Hb
Consistent with the maintenance of Hb during the study, reticulocyte count, RBC count and Hct
values showed little change over the study in either treatment group.
Clinical Trial Results Synopsis
20-NOV-2017 Study no. 15653 Page: 12 of 13
None of the pre-defined subgroups in each treatment arm were found to have a clinically significant
worsening of Hb at EoT.
Safety evaluation
The majority of subjects (n=137, 85.6%) reported at least 1 TEAE for the overall period, the
proportion of subjects was comparable between treatments (BAY85-3934: 85.6%, darbepoetin:
85.7%). The system organ classes (SOCs) investigations and vascular disorders presented the largest
percent difference between the 2 groups with 12.7% and 11.7% respectively compared to other
SOCs which were similar between BAY85-3934 and darbepoetin. The percentage of subjects
reporting the preferred term hypertension was higher in the darbepoetin group than in the BAY85-
3934 group (33.3% versus 20.3% respectively). Worsening of CKD reported as a TEAE was similar
between the treatment groups (BAY85-3934: 17.8%, darbepoetin: 19.0%). Most other preferred
terms were noted in < 10% of total subjects. Incidences of study drug-related TEAEs was low in the
study (6.3% overall) reported for 8 (6.8%) subjects in the BAY85-3934 group and 2 (4.8%) subjects
in the darbepoetin group. Incidences of study procedure-related TEAEs was also low occurring for
3 subjects in total; 2 subjects with BAY85-3934 and 1 subject with darbepoetin.
Five subjects in the BAY85-3934 group and 1 subject in the darbepoetin group died on study.
Causes of death for BAY85-3934 subjects were heart failure (2 cases, 1 case being worsening of
heart failure), acute respiratory failure, pneumonia, and gangrene. Metastatic gastric cancer was the
cause of death for the darbepoetin subject. No death was judged by the investigator as study drug-
related.
Similar rates of serious TEAEs were reported for BAY85-3934 and darbepoetin treatments (47.5%
versus 52.4% respectively). In this population, worsening of CKD, pneumonia, and ESRD were the
most commonly preferred terms in > 5 total subjects. Three subjects reported serious treatment-
related events which included hypertension reported in the darbepoetin group and melena and
intestinal adenocarcinoma reported in the BAY 85-3934 group.
The CAC adjudicated all deaths, major adverse cardiovascular event (MACE), and serious TEAEs
of severe arrhythmias, thromboembolic events (excluding hemodialysis vascular access events:
arteriovenous shunt / fistula and arteriovenous graft events), syncope or symptomatic hypotension,
and heart failure. The proportion of subjects with MACE were numerically higher in in the
BAY85-3934 group (6.8%) versus darbepoetin group (4.8%). The proportion of subjects reporting
positively adjudicated serious TEAEs was the same in each treatment group (11.9% in each group).
In addition to MACE, heart failure (total 4.4%), and death and thromboembolic events (total 3.8%
each) were the most frequently reported adjudicated TEAEs across the 2 groups.
For the Main Phase, treatment withdrawals / discontinuations due to TEAEs were reported in 17.5%
of subjects in the BAY85-3934 group and 7.3% of subjects in the darbepoetin group. This imbalance
was also observed for the overall period; 21.2% of subjects in the BAY85-3934 group and 9.5% of
subjects in the darbepoetin group. Among all reported SOCs in the Main Phase, renal and urinary
disorders were the most commonly reported SOC for treatment discontinuation across the treatment
groups (BAY85-3934: 7.8% versus darbepoetin: 4.9%). Other SOCs reported occurred for < 3% of
subjects in any arm. It should be noted that investigators may have chosen to discontinue subjects
from oral BAY85-3934, as this was an open-label study and BAY85-3934 subjects could switch to
Clinical Trial Results Synopsis
20-NOV-2017 Study no. 15653 Page: 13 of 13
standard of care parenteral darbepoetin once every 2 weeks (fallback option), while subjects on
darbepoetin were already receiving standard of care. This reason may have contributed to the
imbalance in discontinuations.
Dose interruptions due to TEAEs were reported by < 10% of Main Phase subjects, driven by the
SOC cardiac disorders reported for 4 out of 10 subjects. All dose interruptions were observed in the
BAY85-3934 group only. Other SOCs leading to dose interruption were reported in a total of 2
subjects or less. No TEAE leading to dose interruption was considered treatment-related by the
investigator. The preferred terms myocardial infarction, pneumonia, traumatic subdural hemorrhage,
and cardiac failure chronic were assessed as serious TEAEs that led to dose interruption.
Overall, there were no clinically meaningful changes from baseline laboratory parameters or vital
signs in either treatment group.
The overall rate of TEAEs, SAEs, and non-fatal MACE were similar between the two treatment
groups and no other safety issue was identified with BAY85-3934. The incidence of deaths under
BAY85-3934 was 4.2% relative to 2.4% under darbepoetin. The overall results of this study show a
comparable safety profile of BAY85-3934 relative to darbepoetin which is standard of care.
However, the number of subjects included in this study was too low (n=118) to draw meaningful
conclusions on the long-term safety of BAY85-3934.
Overall conclusions
In this open-label extension study, BAY85-3934 maintained mean local Hb in the target range of
10.0 –12.0 g/dL throughout the study. Hemoglobin measurements performed by the central
laboratory had results similar to local laboratory results. The magnitude of the effect of
BAY85-3934 on mean Hb levels was similar to that of darbepoetin. The results of this study show a
comparable safety profile of BAY85-3934 in comparison to darbepoetin which is standard of care.
However, the number of subjects included in this study was too low (n=118) to draw meaningful
conclusions on the long-term safety of BAY85-3934.