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Evaluating results from the multiple myeloma patient subset treated with denosumab or zoledronic acid in a randomized phase 3 trial

Identifieur interne : 000701 ( Pmc/Curation ); précédent : 000700; suivant : 000702

Evaluating results from the multiple myeloma patient subset treated with denosumab or zoledronic acid in a randomized phase 3 trial

Auteurs : N. Raje ; S. Vadhan-Raj [États-Unis] ; W. Willenbacher [Autriche] ; E. Terpos [Grèce] ; V. Hungria [Brésil] ; A. Spencer [Australie] ; Y. Alexeeva [Russie] ; T. Facon [France] ; A K Stewart [États-Unis] ; A. Feng [États-Unis] ; A. Braun [États-Unis] ; A. Balakumaran [États-Unis] ; G D Roodman [États-Unis]

Source :

RBID : PMC:4742634

Abstract

In a phase 3 trial of denosumab vs zoledronic acid in patients (n=1776) with bone metastases and solid tumors or multiple myeloma, denosumab was superior to zoledronic acid for the primary end point of prevention of skeletal-related events. There was no difference in overall survival between the two groups; however, an ad hoc overall survival analysis in the multiple myeloma subset of patients (n=180) favored zoledronic acid (hazard ratio (HR) 2.26; 95% confidence interval (CI) 1.13–4.50; P=0.014). In the present analysis, we found imbalances between the groups with respect to baseline risk characteristics. HRs with two-sided 95% CIs were estimated using the Cox model. After adjustment in a covariate analysis, the CI crossed unity (HR 1.86; 95% CI 0.90–3.84; P=0.0954). Furthermore, we found a higher rate of early withdrawals for the reasons of lost to follow-up and withdrawal of consent in the zoledronic acid group; after accounting for these, the HR was 1.31 (95% CI 0.80–2.15; P=0.278). In conclusion, the survival results in multiple myeloma patients in this trial were confounded and will eventually be resolved by an ongoing phase 3 trial.


Url:
DOI: 10.1038/bcj.2015.96
PubMed: 26745852
PubMed Central: 4742634

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N. Raje
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Le document en format XML

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<p>In a phase 3 trial of denosumab vs zoledronic acid in patients (
<italic>n</italic>
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<italic>ad hoc</italic>
overall survival analysis in the multiple myeloma subset of patients (
<italic>n</italic>
=180) favored zoledronic acid (hazard ratio (HR) 2.26; 95% confidence interval (CI) 1.13–4.50;
<italic>P</italic>
=0.014). In the present analysis, we found imbalances between the groups with respect to baseline risk characteristics. HRs with two-sided 95% CIs were estimated using the Cox model. After adjustment in a covariate analysis, the CI crossed unity (HR 1.86; 95% CI 0.90–3.84;
<italic>P</italic>
=0.0954). Furthermore, we found a higher rate of early withdrawals for the reasons of lost to follow-up and withdrawal of consent in the zoledronic acid group; after accounting for these, the HR was 1.31 (95% CI 0.80–2.15;
<italic>P</italic>
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<article-title>Evaluating results from the multiple myeloma patient subset treated with denosumab or zoledronic acid in a randomized phase 3 trial</article-title>
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<name>
<surname>Raje</surname>
<given-names>N</given-names>
</name>
<xref ref-type="aff" rid="aff1">1</xref>
<xref ref-type="corresp" rid="caf1">*</xref>
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<contrib contrib-type="author">
<name>
<surname>Vadhan-Raj</surname>
<given-names>S</given-names>
</name>
<xref ref-type="aff" rid="aff2">2</xref>
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<name>
<surname>Willenbacher</surname>
<given-names>W</given-names>
</name>
<xref ref-type="aff" rid="aff3">3</xref>
</contrib>
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<name>
<surname>Terpos</surname>
<given-names>E</given-names>
</name>
<xref ref-type="aff" rid="aff4">4</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Hungria</surname>
<given-names>V</given-names>
</name>
<xref ref-type="aff" rid="aff5">5</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Spencer</surname>
<given-names>A</given-names>
</name>
<xref ref-type="aff" rid="aff6">6</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Alexeeva</surname>
<given-names>Y</given-names>
</name>
<xref ref-type="aff" rid="aff7">7</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Facon</surname>
<given-names>T</given-names>
</name>
<xref ref-type="aff" rid="aff8">8</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Stewart</surname>
<given-names>A K</given-names>
</name>
<xref ref-type="aff" rid="aff9">9</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Feng</surname>
<given-names>A</given-names>
</name>
<xref ref-type="aff" rid="aff10">10</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Braun</surname>
<given-names>A</given-names>
</name>
<xref ref-type="aff" rid="aff10">10</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Balakumaran</surname>
<given-names>A</given-names>
</name>
<xref ref-type="aff" rid="aff10">10</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Roodman</surname>
<given-names>G D</given-names>
</name>
<xref ref-type="aff" rid="aff11">11</xref>
</contrib>
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,
<country>Boston</country>
, MA,
<country>USA</country>
</aff>
<aff id="aff2">
<label>2</label>
<institution>University of Texas, MD Anderson Cancer Center</institution>
, Houston, TX,
<country>USA</country>
</aff>
<aff id="aff3">
<label>3</label>
<institution>Internal Medicine V, Haematology and Oncology, Medical University of Innsbruck</institution>
, Innsbruck,
<country>Austria</country>
</aff>
<aff id="aff4">
<label>4</label>
<institution>Department of Clinical Therapeutics, National and Kapodistrian University of Athens, School of Medicine</institution>
, Athens,
<country>Greece</country>
</aff>
<aff id="aff5">
<label>5</label>
<institution>Irmandade da Santa Casa de Misericordia de Sao Paulo</institution>
, São Paulo,
<country>Brazil</country>
</aff>
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<label>6</label>
<institution>The Alfred Hospital</institution>
, Melbourne, Victoria,
<country>Australia</country>
</aff>
<aff id="aff7">
<label>7</label>
<institution>City Hospital No. 31</institution>
, Saint Petersburg,
<country>Russia</country>
</aff>
<aff id="aff8">
<label>8</label>
<institution>Hôpital Claude Huriez</institution>
, Lille,
<country>France</country>
</aff>
<aff id="aff9">
<label>9</label>
<institution>Mayo Clinic</institution>
, Scottsdale, AZ,
<country>USA</country>
</aff>
<aff id="aff10">
<label>10</label>
<institution>Amgen Inc.</institution>
, Thousand Oaks, CA,
<country>USA</country>
</aff>
<aff id="aff11">
<label>11</label>
<institution>Indiana University School of Medicine</institution>
, Indianapolis, IN,
<country>USA</country>
</aff>
</contrib-group>
<author-notes>
<corresp id="caf1">
<label>*</label>
<institution>Center for Multiple Myeloma, Massachusetts General Hospital Cancer Center</institution>
, Boston, MA 02114,
<country>USA</country>
. E-mail:
<email>nraje@partners.org</email>
</corresp>
</author-notes>
<pub-date pub-type="ppub">
<month>01</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>08</day>
<month>01</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="pmc-release">
<day>1</day>
<month>1</month>
<year>2016</year>
</pub-date>
<volume>6</volume>
<issue>1</issue>
<fpage>e378</fpage>
<lpage></lpage>
<history>
<date date-type="received">
<day>14</day>
<month>04</month>
<year>2015</year>
</date>
<date date-type="rev-recd">
<day>18</day>
<month>08</month>
<year>2015</year>
</date>
<date date-type="accepted">
<day>02</day>
<month>09</month>
<year>2015</year>
</date>
</history>
<permissions>
<copyright-statement>Copyright © 2016 Macmillan Publishers Limited</copyright-statement>
<copyright-year>2016</copyright-year>
<copyright-holder>Macmillan Publishers Limited</copyright-holder>
<license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by-nc-nd/4.0/">
<pmc-comment>author-paid</pmc-comment>
<license-p>This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit
<ext-link ext-link-type="uri" xlink:href="http://creativecommons.org/licenses/by-nc-nd/4.0/">http://creativecommons.org/licenses/by-nc-nd/4.0/</ext-link>
</license-p>
</license>
</permissions>
<abstract>
<p>In a phase 3 trial of denosumab vs zoledronic acid in patients (
<italic>n</italic>
=1776) with bone metastases and solid tumors or multiple myeloma, denosumab was superior to zoledronic acid for the primary end point of prevention of skeletal-related events. There was no difference in overall survival between the two groups; however, an
<italic>ad hoc</italic>
overall survival analysis in the multiple myeloma subset of patients (
<italic>n</italic>
=180) favored zoledronic acid (hazard ratio (HR) 2.26; 95% confidence interval (CI) 1.13–4.50;
<italic>P</italic>
=0.014). In the present analysis, we found imbalances between the groups with respect to baseline risk characteristics. HRs with two-sided 95% CIs were estimated using the Cox model. After adjustment in a covariate analysis, the CI crossed unity (HR 1.86; 95% CI 0.90–3.84;
<italic>P</italic>
=0.0954). Furthermore, we found a higher rate of early withdrawals for the reasons of lost to follow-up and withdrawal of consent in the zoledronic acid group; after accounting for these, the HR was 1.31 (95% CI 0.80–2.15;
<italic>P</italic>
=0.278). In conclusion, the survival results in multiple myeloma patients in this trial were confounded and will eventually be resolved by an ongoing phase 3 trial.</p>
</abstract>
</article-meta>
</front>
<floats-group>
<fig id="fig1">
<label>Figure 1</label>
<caption>
<p>(
<bold>a</bold>
) Overall survival analysis, multiple myeloma subset. (
<bold>b</bold>
) Time to death, consent withdrawn or lost to follow-up. Q4W, every 4 weeks.</p>
</caption>
<graphic xlink:href="bcj201596f1"></graphic>
</fig>
<fig id="fig2">
<label>Figure 2</label>
<caption>
<p>Overall survival rate: Myeloma IX study vs study 244 multiple myeloma subgroup.</p>
</caption>
<graphic xlink:href="bcj201596f2"></graphic>
</fig>
<table-wrap id="tbl1">
<label>Table 1</label>
<caption>
<title>Baseline/on-study characteristics in the multiple myeloma subset of the phase 3 study</title>
</caption>
<table frame="hsides" rules="groups" border="1">
<colgroup>
<col align="left"></col>
<col align="char" char="("></col>
<col align="char" char="("></col>
</colgroup>
<thead valign="bottom">
<tr>
<th align="left" valign="top" charoff="50">
<italic>Characteristic,</italic>
n
<italic>(%)</italic>
</th>
<th align="center" valign="top" char="(" charoff="50">
<italic>Zoledronic acid (</italic>
n=
<italic>93)</italic>
</th>
<th align="center" valign="top" char="(" charoff="50">
<italic>Denosumab (</italic>
n=
<italic>87)</italic>
</th>
</tr>
</thead>
<tbody valign="top">
<tr>
<td colspan="3" align="left" valign="top" charoff="50">
<italic>Sex</italic>
</td>
</tr>
<tr>
<td align="left" valign="top" charoff="50"> Male</td>
<td align="char" valign="top" char="(" charoff="50">54 (58%)</td>
<td align="char" valign="top" char="(" charoff="50">57 (66%)</td>
</tr>
<tr>
<td colspan="3" align="left" valign="top" charoff="50"> </td>
</tr>
<tr>
<td colspan="3" align="left" valign="top" charoff="50">
<italic>Age, years</italic>
</td>
</tr>
<tr>
<td align="left" valign="top" charoff="50"> Mean (s.d.)</td>
<td align="char" valign="top" char="(" charoff="50">63 (11)</td>
<td align="char" valign="top" char="(" charoff="50">62 (10)</td>
</tr>
<tr>
<td colspan="3" align="left" valign="top" charoff="50"> </td>
</tr>
<tr>
<td colspan="3" align="left" valign="top" charoff="50">
<italic>ECOG performance status at study entry</italic>
</td>
</tr>
<tr>
<td align="left" valign="top" charoff="50"> 0</td>
<td align="char" valign="top" char="(" charoff="50">30 (32%)</td>
<td align="char" valign="top" char="(" charoff="50">21 (24%)</td>
</tr>
<tr>
<td align="left" valign="top" charoff="50"> 1</td>
<td align="char" valign="top" char="(" charoff="50">44 (47%)</td>
<td align="char" valign="top" char="(" charoff="50">50 (58%)</td>
</tr>
<tr>
<td align="left" valign="top" charoff="50"> 2</td>
<td align="char" valign="top" char="(" charoff="50">18 (19%)</td>
<td align="char" valign="top" char="(" charoff="50">15 (17%)</td>
</tr>
<tr>
<td colspan="3" align="left" valign="top" charoff="50"> </td>
</tr>
<tr>
<td colspan="3" align="left" valign="top" charoff="50">
<italic>Creatinine clearance at baseline</italic>
</td>
</tr>
<tr>
<td align="left" valign="top" charoff="50"> ⩾30 ml/min to <40 ml/min</td>
<td align="char" valign="top" char="(" charoff="50">2 (2%)</td>
<td align="char" valign="top" char="(" charoff="50">9 (10%)</td>
</tr>
<tr>
<td align="left" valign="top" charoff="50"> ⩾40 ml/min to ⩽60 ml/min</td>
<td align="char" valign="top" char="(" charoff="50">23 (25%)</td>
<td align="char" valign="top" char="(" charoff="50">2 (2%)</td>
</tr>
<tr>
<td align="left" valign="top" charoff="50"> >60 ml/min</td>
<td align="char" valign="top" char="(" charoff="50">64 (69%)</td>
<td align="char" valign="top" char="(" charoff="50">76 (87%)</td>
</tr>
<tr>
<td align="left" valign="top" charoff="50"> Missing</td>
<td align="char" valign="top" char="(" charoff="50">4 (4%)</td>
<td align="char" valign="top" char="(" charoff="50">0 (0%)</td>
</tr>
<tr>
<td colspan="3" align="left" valign="top" charoff="50"> </td>
</tr>
<tr>
<td colspan="3" align="left" valign="top" charoff="50">
<italic>Primary ISS stage at diagnosis–multiple myeloma</italic>
</td>
</tr>
<tr>
<td align="left" valign="top" charoff="50"> I</td>
<td align="char" valign="top" char="(" charoff="50">13 (14%)</td>
<td align="char" valign="top" char="(" charoff="50">9 (10%)</td>
</tr>
<tr>
<td align="left" valign="top" charoff="50"> II</td>
<td align="char" valign="top" char="(" charoff="50">23 (25%)</td>
<td align="char" valign="top" char="(" charoff="50">28 (32%)</td>
</tr>
<tr>
<td align="left" valign="top" charoff="50"> III</td>
<td align="char" valign="top" char="(" charoff="50">56 (60%)</td>
<td align="char" valign="top" char="(" charoff="50">49 (56%)</td>
</tr>
<tr>
<td align="left" valign="top" charoff="50">Autologous stem cell transplant (before or on study),
<italic>n</italic>
</td>
<td align="center" valign="top" char="(" charoff="50">93 23 (25%)</td>
<td align="center" valign="top" char="(" charoff="50">86 15 (17%)</td>
</tr>
<tr>
<td align="left" valign="top" charoff="50">
<italic>Anti-myeloma treatments on study,</italic>
<xref ref-type="fn" rid="t1-fn2">a</xref>
n</td>
<td align="center" valign="top" char="(" charoff="50">92</td>
<td align="center" valign="top" char="(" charoff="50">86</td>
</tr>
<tr>
<td align="left" valign="top" charoff="50"> Melphalan</td>
<td align="char" valign="top" char="(" charoff="50">48 (52%)</td>
<td align="char" valign="top" char="(" charoff="50">34 (40%)</td>
</tr>
<tr>
<td align="left" valign="top" charoff="50"> Thalidomide</td>
<td align="char" valign="top" char="(" charoff="50">44 (48%)</td>
<td align="char" valign="top" char="(" charoff="50">32 (37%)</td>
</tr>
<tr>
<td align="left" valign="top" charoff="50"> Bortezomib</td>
<td align="char" valign="top" char="(" charoff="50">25 (27%)</td>
<td align="char" valign="top" char="(" charoff="50">28 (33%)</td>
</tr>
<tr>
<td align="left" valign="top" charoff="50"> Cyclophosphamide</td>
<td align="char" valign="top" char="(" charoff="50">19 (21%)</td>
<td align="char" valign="top" char="(" charoff="50">25 (29%)</td>
</tr>
<tr>
<td align="left" valign="top" charoff="50"> Lenalidomide</td>
<td align="char" valign="top" char="(" charoff="50">19 (21%)</td>
<td align="char" valign="top" char="(" charoff="50">16 (19%)</td>
</tr>
</tbody>
</table>
<table-wrap-foot>
<fn id="t1-fn1">
<p>Abbreviations: ECOG, Eastern Cooperative Oncology Group; ISS, International Staging System.</p>
</fn>
<fn id="t1-fn2">
<label>a</label>
<p>Further details on combination regimens were not collected.</p>
</fn>
</table-wrap-foot>
</table-wrap>
<table-wrap id="tbl2">
<label>Table 2</label>
<caption>
<title>Patient disposition</title>
</caption>
<table frame="hsides" rules="groups" border="1">
<colgroup>
<col align="left"></col>
<col align="char" char="("></col>
<col align="char" char="("></col>
</colgroup>
<thead valign="bottom">
<tr>
<th align="left" valign="top" charoff="50">
<italic>Characteristic,</italic>
n
<italic>(%)</italic>
</th>
<th align="center" valign="top" char="(" charoff="50">
<italic>Zoledronic acid (</italic>
n=
<italic>93)</italic>
</th>
<th align="center" valign="top" char="(" charoff="50">
<italic>Denosumab (</italic>
n=
<italic>87)</italic>
</th>
</tr>
</thead>
<tbody valign="top">
<tr>
<td align="left" valign="top" charoff="50">
<italic>Withdrew before primary data cutoff</italic>
</td>
<td align="char" valign="top" char="(" charoff="50">45 (48%)</td>
<td align="char" valign="top" char="(" charoff="50">48 (55%)</td>
</tr>
<tr>
<td align="left" valign="top" charoff="50"> Death</td>
<td align="char" valign="top" char="(" charoff="50">8 (9%)</td>
<td align="char" valign="top" char="(" charoff="50">19 (22%)</td>
</tr>
<tr>
<td align="left" valign="top" charoff="50"> Consent withdrawn</td>
<td align="char" valign="top" char="(" charoff="50">16 (17%)</td>
<td align="char" valign="top" char="(" charoff="50">11 (13%)</td>
</tr>
<tr>
<td align="left" valign="top" charoff="50"> Other</td>
<td align="char" valign="top" char="(" charoff="50">3 (3%)</td>
<td align="char" valign="top" char="(" charoff="50">6 (7%)</td>
</tr>
<tr>
<td align="left" valign="top" charoff="50"> Disease progression</td>
<td align="char" valign="top" char="(" charoff="50">1 (1%)</td>
<td align="char" valign="top" char="(" charoff="50">6 (7%)</td>
</tr>
<tr>
<td align="left" valign="top" charoff="50"> Subject request</td>
<td align="char" valign="top" char="(" charoff="50">6 (7%)</td>
<td align="char" valign="top" char="(" charoff="50">3 (3%)</td>
</tr>
<tr>
<td align="left" valign="top" charoff="50"> Adverse event</td>
<td align="char" valign="top" char="(" charoff="50">7 (8%)</td>
<td align="char" valign="top" char="(" charoff="50">2 (3%)</td>
</tr>
<tr>
<td align="left" valign="top" charoff="50"> Protocol deviation</td>
<td align="char" valign="top" char="(" charoff="50">0 (0%)</td>
<td align="char" valign="top" char="(" charoff="50">1 (1%)</td>
</tr>
<tr>
<td align="left" valign="top" charoff="50"> Noncompliance</td>
<td align="char" valign="top" char="(" charoff="50">2 (2%)</td>
<td align="char" valign="top" char="(" charoff="50">0 (0%)</td>
</tr>
<tr>
<td align="left" valign="top" charoff="50"> Ineligibility determined</td>
<td align="char" valign="top" char="(" charoff="50">1 (1%)</td>
<td align="char" valign="top" char="(" charoff="50">0 (0%)</td>
</tr>
<tr>
<td align="left" valign="top" charoff="50"> Lost to follow-up</td>
<td align="char" valign="top" char="(" charoff="50">1 (1%)</td>
<td align="char" valign="top" char="(" charoff="50">0 (0%)</td>
</tr>
</tbody>
</table>
</table-wrap>
</floats-group>
</pmc>
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