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Assessing the Impact of Cancer: Development of a new instrument for long-term survivors

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Assessing the Impact of Cancer: Development of a new instrument for long-term survivors

Auteurs : Brad J. Zebrack ; Patricia A. Ganz ; Coen A. Bernaards ; Laura Petersen ; Laura Abraham

Source :

Psycho-oncology [ 1057-9249 ] ; 2006.

RBID : PMC:3731126

Abstract

Objective

To develop and evaluate a new instrument that measures aspects of long-term survivorship not measured by existing tools.

Methods

In qualitative interviews, 47 long-term cancer survivors (LTS) detailed ways that cancer has impacted their lives. Content analysis resulted in the creation of 325 candidate items for inclusion in a new Impact of Cancer (IOC) instrument. Following expert review, item reduction and pilot testing, 81 items were administered with other established health status and quality of life (QOL) instruments to 193 LTS of breast, prostate, colorectal cancers and lymphoma. Internal consistency reliability and validity of newly-derived scales was assessed.

Results

Factor analysis of items using a priori QOL domains resulted in the derivation of ten new and specific subscales: health awareness, body changes, health worries, positive and negative self-evaluation, positive and negative life outlook, social life interferences, relationships, and meaning of cancer. Internal consistency measurements for these subscales ranged from 0.67 to 0.89. Expected associations within and among the IOC subscales and standardized measures of health status and QOL were observed, as were some unexpected findings.

Conclusions

Psychometric analysis indicated that this initial version of the Impact of Cancer instrument measures distinct and relevant constructs for LTS. Future work is necessary to confirm the factor structure, responsiveness and further validation of the instrument.

Url:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3731126

DOI: 10.1002/pon.963
PubMed: 16097041
PubMed Central: 3731126

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Patricia A. Ganz

<affiliation><nlm:aff id="A2">UCLA Jonsson Comprehensive Cancer Center, Division of Cancer Prevention and Control Research</nlm:aff>
<wicri:noCountry code="subfield">Division of Cancer Prevention and Control Research</wicri:noCountry>
</affiliation>

<affiliation><nlm:aff id="A3">UCLA Schools of Medicine and Public Health</nlm:aff>
</affiliation>

Coen A. Bernaards

<affiliation><nlm:aff id="A4">Genentech Inc, Oncology Biostatistics</nlm:aff>
<wicri:noCountry code="subfield">Oncology Biostatistics</wicri:noCountry>
</affiliation>

Laura Petersen

<affiliation><nlm:aff id="A2">UCLA Jonsson Comprehensive Cancer Center, Division of Cancer Prevention and Control Research</nlm:aff>
<wicri:noCountry code="subfield">Division of Cancer Prevention and Control Research</wicri:noCountry>
</affiliation>

Laura Abraham

<affiliation><nlm:aff id="A2">UCLA Jonsson Comprehensive Cancer Center, Division of Cancer Prevention and Control Research</nlm:aff>
<wicri:noCountry code="subfield">Division of Cancer Prevention and Control Research</wicri:noCountry>
</affiliation>

Le document en format XML

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<front><div type="abstract" xml:lang="en"><sec id="S1"><title>Objective</title>
<p id="P1">To develop and evaluate a new instrument that measures aspects of long-term survivorship not measured by existing tools.</p>
</sec>
<sec id="S2"><title>Methods</title>
<p id="P2">In qualitative interviews, 47 long-term cancer survivors (LTS) detailed ways that cancer has impacted their lives. Content analysis resulted in the creation of 325 candidate items for inclusion in a new Impact of Cancer (IOC) instrument. Following expert review, item reduction and pilot testing, 81 items were administered with other established health status and quality of life (QOL) instruments to 193 LTS of breast, prostate, colorectal cancers and lymphoma. Internal consistency reliability and validity of newly-derived scales was assessed.</p>
</sec>
<sec id="S3"><title>Results</title>
<p id="P3">Factor analysis of items using <italic>a priori</italic>
 QOL domains resulted in the derivation of ten new and specific subscales: <italic>health awareness, body changes, health worries, positive and negative self-evaluation, positive and negative life outlook, social life interferences, relationships, and meaning of cancer</italic>
. Internal consistency measurements for these subscales ranged from 0.67 to 0.89. Expected associations within and among the IOC subscales and standardized measures of health status and QOL were observed, as were some unexpected findings.</p>
</sec>
<sec id="S4"><title>Conclusions</title>
<p id="P4">Psychometric analysis indicated that this initial version of the Impact of Cancer instrument measures distinct and relevant constructs for LTS. Future work is necessary to confirm the factor structure, responsiveness and further validation of the instrument.</p>
</sec>
</div>
</front>
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  <front><journal-meta><journal-id journal-id-type="nlm-journal-id">9214524</journal-id>
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<article-categories><subj-group subj-group-type="heading"><subject>Article</subject>
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<title-group><article-title>Assessing the Impact of Cancer: Development of a new instrument for long-term survivors</article-title>
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<contrib-group><contrib contrib-type="author"><name><surname>Zebrack</surname>
<given-names>Brad J.</given-names>
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<degrees>Ph.D., MSW</degrees>
<xref ref-type="aff" rid="A1">1</xref>
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<contrib contrib-type="author"><name><surname>Ganz</surname>
<given-names>Patricia A.</given-names>
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<degrees>M.D.</degrees>
<xref ref-type="aff" rid="A2">2</xref>
<xref ref-type="aff" rid="A3">3</xref>
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<contrib contrib-type="author"><name><surname>Bernaards</surname>
<given-names>Coen A.</given-names>
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<degrees>Ph.D.</degrees>
<xref ref-type="aff" rid="A4">4</xref>
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<contrib contrib-type="author"><name><surname>Petersen</surname>
<given-names>Laura</given-names>
</name>
<degrees>M.S.</degrees>
<xref ref-type="aff" rid="A2">2</xref>
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<contrib contrib-type="author"><name><surname>Abraham</surname>
<given-names>Laura</given-names>
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<degrees>B.A.</degrees>
<xref ref-type="aff" rid="A2">2</xref>
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</contrib-group>
<aff id="A1"><label>1</label>
University of Southern California School of Social Work</aff>
<aff id="A2"><label>2</label>
UCLA Jonsson Comprehensive Cancer Center, Division of Cancer Prevention and Control Research</aff>
<aff id="A3"><label>3</label>
UCLA Schools of Medicine and Public Health</aff>
<aff id="A4"><label>4</label>
Genentech Inc, Oncology Biostatistics</aff>
<author-notes><corresp id="FN1">Address correspondence to Brad Zebrack, PhD, MSW, USC School of Social Work, 669 West 34<sup>th</sup>
 St., Los Angeles, CA 90089-0411, (213) 821-3111, FAX (213) 821-2088, <email>zebrack@usc.edu</email>
</corresp>
</author-notes>
<pub-date pub-type="nihms-submitted"><day>28</day>
<month>6</month>
<year>2013</year>
</pub-date>
<pub-date pub-type="ppub"><month>5</month>
<year>2006</year>
</pub-date>
<pub-date pub-type="pmc-release"><day>01</day>
<month>8</month>
<year>2013</year>
</pub-date>
<volume>15</volume>
<issue>5</issue>
<fpage>407</fpage>
<lpage>421</lpage>
<abstract><sec id="S1"><title>Objective</title>
<p id="P1">To develop and evaluate a new instrument that measures aspects of long-term survivorship not measured by existing tools.</p>
</sec>
<sec id="S2"><title>Methods</title>
<p id="P2">In qualitative interviews, 47 long-term cancer survivors (LTS) detailed ways that cancer has impacted their lives. Content analysis resulted in the creation of 325 candidate items for inclusion in a new Impact of Cancer (IOC) instrument. Following expert review, item reduction and pilot testing, 81 items were administered with other established health status and quality of life (QOL) instruments to 193 LTS of breast, prostate, colorectal cancers and lymphoma. Internal consistency reliability and validity of newly-derived scales was assessed.</p>
</sec>
<sec id="S3"><title>Results</title>
<p id="P3">Factor analysis of items using <italic>a priori</italic>
 QOL domains resulted in the derivation of ten new and specific subscales: <italic>health awareness, body changes, health worries, positive and negative self-evaluation, positive and negative life outlook, social life interferences, relationships, and meaning of cancer</italic>
. Internal consistency measurements for these subscales ranged from 0.67 to 0.89. Expected associations within and among the IOC subscales and standardized measures of health status and QOL were observed, as were some unexpected findings.</p>
</sec>
<sec id="S4"><title>Conclusions</title>
<p id="P4">Psychometric analysis indicated that this initial version of the Impact of Cancer instrument measures distinct and relevant constructs for LTS. Future work is necessary to confirm the factor structure, responsiveness and further validation of the instrument.</p>
</sec>
</abstract>
<kwd-group><kwd>Cancer survivors</kwd>
<kwd>Instrument development</kwd>
<kwd>Psychometric testing</kwd>
<kwd>Quality of life</kwd>
</kwd-group>
<funding-group><award-group><funding-source country="United States">National Cancer Institute : NCI</funding-source>
<award-id>R03 CA078972-02 || CA</award-id>
</award-group>
</funding-group>
</article-meta>
</front>
</pmc>
</record>

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Assessing the Impact of Cancer: Development of a new instrument for long-term survivors

Assessing the Impact of Cancer: Development of a new instrument for long-term survivors

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Abstract

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