prospective evaluation of legal difficulties and quality of life in adult survivors of childhood...
TRANSCRIPT
Pediatr Blood Cancer 2011;56:439–443
Prospective Evaluation of Legal Difficulties and Quality of Lifein Adult Survivors of Childhood Cancer
Robert Olson, BSc, MD, FRCPC,1,2* Gabe Hung, BSc,3 Mary Anne Bobinski, BA, JD, LLM, PhD,3
and Karen Goddard, FRCP(UK), FRCPC4
INTRODUCTION
Over the past several decades, therapeutic advances in the
treatment of pediatric malignancies have led to significant improve-
ments in overall patient survival. Currently, at least 80% of all
children with pediatric malignancies will be cured of their disease
[1]. As a result, it is estimated that 1 person in 250 of the adult
population is currently a survivor of childhood cancer [2].
Improvements in cure rates are predominantly attributed to
therapy intensification, including increased chemotherapy dose and
intensity, more aggressive surgery, and the concurrent adminis-
tration of chemotherapy with radiotherapy. However, therapy
intensification increases the risk of long term side effects, which
have the potential to negatively impact survivors’ long term health
and wellbeing [3]. This has been documented extensively in the last
decade [4–9]. While the majority of patients will have mild to
moderate health problems, at least 40% of survivors have late effects
related to their previous cancer and therapy that significantly affect
their health related quality of life (QoL) [10].
Educational and social problems that persist into adulthood are
common and particularly problematic late side effects in adult
survivors of childhood cancer (ASCC) [11]. As a result, survivors
are likely to be at increased risk of legal difficulties (LDs), including
discrimination and limited access to public services, such as
appropriate education, rehabilitation, employment, disability bene-
fits, dental plans, and insurance [12–15]. Because of their increased
risk of side effects, we hypothesize that survivors of CNS tumors are
most at risk of LDs. We also hypothesize that LDs negatively affect
the QoL of ASCC.
PATIENTS AND METHODS
Survey Construction and QoL Measure Selection
A survey was developed at the BC Cancer Agency (BCCA), in
order to collect information on survivors’ legal needs. Content of
the survey was initially developed by the study authors, but subse-
quently modified after patient feedback. Specifically, survivors’
opinions regarding difficulty with the cost of prescriptions were
added after 10 patients had already completed the questionnaire.
Our primary objective was to assess the relationship between
QoL and LDs. Therefore, the Functional Assessment of Cancer
Therapy (FACT) was completed by survey respondent in order to
assess QoL. The FACT is a well validated and commonly used
assessment of QoL in both general, and central nervous system
(CNS) oncology [16–18]. Survivors were asked to complete the
assessment themselves, though permitted to seek assistance from
family, friends, or caregivers.
Patient Selection
One hundred twelve patients were consecutively approached at
the BCCA Late Effects Clinic (LEC) from January 2009 to February
2010. All patients who attended the clinic were considered eligible,
and approached. Patients who attend the clinic are followed because
they are at intermediate or high risk of grades 3 or 4 late effects
as a result of their therapy [19–21]. Only 1 patient declined to
participate.
Statistics
A convenience sample size of 100 subjects was selected for this
study based on the estimated number of patients that would be seen
during the study period. Descriptive statistics were used to present
Background. Adult survivors of childhood cancer (ASCC),especially those of the central nervous system (CNS), have increasedrisks of educational and social difficulties. It is therefore hypothe-sized they are more likely to encounter legal difficulties (LDs), suchas workplace discrimination and disability insurance denials, whichmay negatively affect their quality of life (QoL). Procedure. Wedeveloped a survey to collect information on patients’ legal needs.QoL was assessed using the Functional Assessment of CancerTherapy (FACT). Results. We prospectively approached 112 ASCC,111 (99.1%) of whom completed the survey. The median age ofrespondents was 7 years at diagnosis and 31 years at surveycompletion. CNS tumors were the most common malignancy(32.4%). LDs were common overall (40.7%), though more prevalentin patients with CNS versus non-CNS tumors (58.6% vs. 32.3%;
P¼ 0.023). The most prevalent LD was workplace discrimination(58.3%). On multivariate analysis, CNS tumor was the only variablesignificantly associated with LDs (OR¼ 4.49, P¼ 0.041). Individualswith LDs had lower QoL scores compared to those without LDs(79.96 versus 91.83 on the FACT; P¼0.005). On multivariateanalysis, individuals with LDs had lower QoL scores (14.95 pointslower on the FACT), which is both clinically and statisticallysignificant (P¼0.047). Conclusions. Legal difficulties are commonin adult survivors of childhood cancer, especially those with braintumors. Furthermore, individuals with legal difficulties have worsequality of life. Research is needed to develop effective and accessiblelegal resource programs. Pediatr Blood Cancer 2011;56:439–443. � 2010 Wiley-Liss, Inc.
Key words: brain tumors; legal difficulties; pediatric cancer; quality of life; survivors; workplace discrimination
� 2010 Wiley-Liss, Inc.DOI 10.1002/pbc.22777Published online 9 September 2010 in Wiley Online Library(wileyonlinelibrary.com)
——————1BC Cancer Agency, University of British Columbia, Vancouver, BC,
Canada; 2Department of Epidemiology, Harvard School of Public
Health, Boston, MA; 3University of British Columbia, Vancouver,
British Columbia, Canada; 4BC Cancer Agency, University of British
Columbia, Vancouver, British Columbia, Canada
Conflict of interest: Nothing to declare.
*Correspondence to: Robert Olson, BC Cancer Agency, 600 West
10th Avenue, Vancouver, BC, Canada V5Z 4E6.
E-mail: [email protected]
Received 22 June 2010; Accepted 13 July 2010
patient characteristics and survey results. Fisher’s exact test
assessed the relationship between categorical respondent variables
and the proportion with LDs. The Mantel–Haenszel common odds
ratio (OR) assessed the magnitude of risk for LD for each categorical
variable. Logistic regression modeling was used to assess the
relationship between LDs and CNS radiotherapy and CNS tumors,
after controlling for other potential confounding variables. Differ-
ences in FACT scores by categorical variables were assessed with
t-tests. Wilcoxon rank sum test assessed the relationship between
potential categorical variables and the number of annual family
physician (FP) visits, since they were non-normally distributed.
Spearman’s correlation coefficient assessed the correlation between
the number of FP visits and QoL scores on the FACT. One way
Analysis of variance (ANOVA) assessed the relationship between
FACT scores and the different categories of FP visits per year.
Multivariate analysis of the relationship between LDs and QoL was
performed using linear regression modeling using propensity score
analysis, because of the small number of outcome events relative to
the number of potential confounding variables [22]. All analyses
were conducted using SPSS Statistics 17.0 software or SAS for
Windows version 9.2.
Research Ethics Approval
The study was approved by the Research Ethics Board at the
BCCA, and was performed in accordance with ethical standards laid
down in the 1964 Declaration of Helsinki. All subjects gave their
informed consent prior to their inclusion in the study. No potential
conflicts of interest exist.
RESULTS
Patient Characteristics
The median age of respondents at diagnosis was 7 years
(Interquartile Range [IQR]¼ 3–11), and 31 (IQR¼ 26–36) at
survey completion. The median interval between diagnosis and
survey completion was 25 years (IQR¼ 19–28). Additional patient
characteristics are presented in Table I.
Survey Response Rate
Of the 112 patients approached, 111 (99.1%) completed the
survey. Despite this excellent response rate, there was considerable
variability in the individual question response rate (range 10.8–
100%; Table II). Of note, 91 (82.0%) of respondents volunteered
whether they had legal difficulties (LDs) or not (Table II). Similarly,
87 (78.4%) of respondents completed the Functional Assessment of
Cancer Therapy (FACT).
Survey Results
Table II presents the survey results, which demonstrates that
LDs are common in adult survivors of pediatric malignancies.
Thirty six of the 37 respondents (97.3%) with LDs provided written
descriptions of the LDs they experienced. The predominant LD
identified from these comments were occupation related (58.3%),
including difficulty finding employment, discrimination at work,
and unfair termination of employment. LDs at school were the next
most common (22.2%), followed by difficulty acquiring life, health,
or disability insurance (16.7%).
Seventeen respondents provided written descriptions of the
legal help they utilized. No consistent resources were identified.
Instead, community organizations, coworkers, employers, tutors,
social workers, lawyers, physicians, friends, and family members
were identified as potential aids to LDs.
Predictors of Legal Difficulties (LDs)
Table III presents the univariate analysis of potential risk factors
for LDs. Notably, respondents with CNS tumors and individuals
who received CNS radiotherapy have a significantly higher
proportion of LDs. This represents an odds ratio (OR) of 2.98
(95% CI¼ 1.20–7.40) for ASCC who had CNS versus non-CNS
tumors. Likewise the OR for ASCC who received CNS RT
compared to those who did not was 3.37 (95% CI¼ 1.12–10.08).
On multivariate analysis, CNS tumor was the only variable signi-
ficantly associated with LDs (Table IV).
Relationship Between Legal Difficulties (LDs)and Quality of Life (QoL)
The overall mean QoL score on the FACT was 87.47 (SD¼16.59). Higher scores represent better QoL [16]. As hypothesized,
individuals with LDs had significantly lower QoL scores on
the FACT than individuals who did not have LDs (Table V). In
addition, females had lower QoL scores than males (Table V). There
were no other significant relationships identified between patient
variables and QoL (Table V). On multivariate analysis, controlling
for age at diagnosis, current age, tumor type, chemotherapy,
Pediatr Blood Cancer DOI 10.1002/pbc
TABLE I. Patient Characteristics
Characteristic
Survivors (n¼ 111)
No. %
Gender
Male 55 49.5
Female 56 50.5
Diagnosis
CNS 36 32.4
Leukemia 32 28.8
Lymphoma 13 11.7
Sarcoma 18 16.2
Wilm’s 7 6.3
Other 5 4.5
Age at diagnosis (years)
<2 14 12.6
2–5 28 25.2
6–10 38 34.2
>10 31 27.9
Current age
<30 61 55.0
�30 50 45.0
Treatment
Chemotherapy 81 73.0
Radiotherapy 102 91.9
CNS radiotherapy 81 73.0
Relapsed malignancy 13 11.7
Secondary tumor 14 12.6
CNS, central nervous system.
440 Olson et al.
radiotherapy, CNS radiotherapy, presence of family physician,
relapse, secondary malignancy, and gender, LDs were associated
with QoL scores 14.95 points lower on the FACT, which is both
clinically and statistically significant (P¼ 0.047).
Visits to Family Physician (FP)
Respondents visited their FP a median of 3 times/year, though
there was significant variability in frequency (0–36 visits/year). The
number of visits per year was inversely related to QoL (r¼�0.252,
P¼ 0.025); in other words, individuals with lower FACT scores
were more likely to see their FP repeatedly. Individuals who saw
their FP <3, 3–10, and >10 times/year had FACT scores of 93.1,
84.8, and 70.3, respectively (P¼ 0.002). In addition, individuals
whose malignancies have relapsed, visit their FP more often than
individuals whose malignancies have not relapsed (median 6 vs.
3 visits/year; P¼ 0.047). Although females saw their FP more often
than male survivors (median 4 vs. 2 times/year), this was not
statistically significant (P¼ 0.209). Likewise, there was no statisti-
cally significant relationship between number of annual FP visits
and LDs (P¼ 0.335), use of chemotherapy (P¼ 0.477), previous
radiotherapy (P¼ 0.901), CNS tumor (P¼ 0.407), CNS RT
(P¼ 0.491) or secondary tumor (P¼ 0.467).
DISCUSSION
Legal Difficulties (LDs) Are Common
Our results indicate that ASCC have a high prevalence of
self perceived LDs, especially those treated for CNS tumors
(Tables II–IV). To the best of our knowledge, this is the first
study to demonstrate this relationship. As hypothesized by
Monaco et al. [12], difficulties are predominantly work or
school related, though also include difficulties obtaining health,
disability, and life insurance. In addition, workplace discrimination
was more common in our study than in previous studies of adults
with cancer, though comparison across studies is problematic,
especially given the different outcome assessments utilized
[15,23,24].
Not only are LDs common, but difficulty finding legal aid
was also frequently reported in our study (Table II). In addition,
the legal aid used by respondents was inconsistent, suggesting
that an easily accessible, common resource would be beneficial.
This is further supported by the fact that 83.0% of respondents
indicated a legal help service for survivors would be useful
(Table II). Furthermore, our results indicate that LDs impose
financial consequences in a significant proportion of respondents
(Table II).
Pediatr Blood Cancer DOI 10.1002/pbc
TABLE II. Selected Survey Results
Question No. of ‘‘yes’’ No. of answered % ‘‘yes’’
Do you have a family doctor? 103 111 92.8
How often do you see your family doctor each year?
0–2 47
101
46.5
3–5 30 29.7
6–10 24 23.8
>10 11 10.9
Have you had any problems with legal issues or discrimination? 37 91 40.7
More than 1 problem? 5 12 41.7
Did you suffer financially as a consequence of this problem? 18 24 75.0
For this problem, was it difficult to find legal help? 18 20 90.0
Did legal help meet your needs? 13 17 76.5
Have you ever had problems with the cost of prescriptions? 24 97a 24.7
Have you ever applied for a disability pension? 29 111 26.1
If yes, was it hard to apply for a disability pension? 9 27 33.3
Would a ‘‘legal help’’ service for survivors be useful? 83 100 83.0
aAdded after 10 subjects.
TABLE III. Relationship Between Patient Variables and LegalDifficulties
Variable
% with Legal Difficulties
If yes If no P-Value
Diagnosis age< 5 44.8 38.7 0.650
Chemotherapy 36.8 54.5 0.212
CNS RT 47.0 20.8 0.030
CNS tumor 58.6 32.3 0.023
Female 44.7 36.4 0.523
Relapse 33.3 41.8 0.755
Second malignancy 54.5 38.8 0.344
CNS, central nervous system; RT, radiotherapy.
TABLE IV. Multivariate Analysis of the Relationship BetweenLegal Difficulties and Patient Variables
Variable
Odds ratio
(95% CI) P-Value
Age at diagnosis (continuous) 0.91 (0.80–1.03) 0.12
Age at accrual (continuous) 1.04 (0.97–1.12) 0.28
Chemotherapy (vs. none) 1.31 (0.31–5.59) 0.72
CNS RT (vs. non-CNS RT) 1.76 (0.48–6.40) 0.39
CNS tumor (vs. non-CNS tumor) 4.49 (1.06–19.04) 0.04
Female (vs. male) 1.64 (0.62–4.39) 0.32
Relapse (vs. none) 0.43 (0.10–1.87) 0.26
Second malignancy (vs. none) 0.76 (0.17–3.35) 0.72
CI, confidence interval; CNS, central nervous system; RT, radiotherapy.
Legal Problems in Pediatric Cancer Survivors 441
Survivors of Central Nervous System (CNS) TumorsHave More Legal Difficulties (LDs)
As hypothesized, LDs were most common in individuals with
CNS tumors and in those who had received cranial radiotherapy
(Table III). Furthermore, after controlling for potential confounding
variables, CNS tumors continued to predict for LDs (Table IV). We
propose that this relationship can be explained by the increased
social and education difficulties experienced by patients with CNS
tumors, as a result of their brain tumors, aggressive multimodality
treatment, and time absent from school [3,4,7,9,25,26].
Our analysis is limited by the number of subjects presenting to
our provincial LEC at the BCCA. Other patient variables listed in
Table III are likely associated with LDs, but our study may have
insufficient statistical power to identify the relationships. Therefore,
we believe that multi-institutional studies in survivors of childhood
cancer are warranted in order to fully explore these potential
relationships.
LDs Are Correlated With Decreased QoL
As hypothesized, individuals with LDs have significantly lower
QoL scores on both univariate and multivariate analysis. This is
likely explained by LDs negatively impacting the daily activities
of respondents, which subsequently decreases their QoL. However,
limitations inherent to cross sectional surveys, prohibits concluding
that LDs are the direct cause of decreased QoL. Most importantly,
without data on LD timing of onset in relation to QoL changes,
the exploration of causality is limited [27].
Generalizability
Given the excellent response rate in our study, we believe that our
results are generalizable to ASCC at intermediate to high risk of
grades 3 or 4 late effects, since these are the patients generally
followed at our provincial LEC [20,21,28,29]. In contrast, we do not
believe these results are generalizable to all ASCC. For example,
patients not followed at our LEC, such as those with low risk
leukemias, treated with less intense chemotherapy alone and no
cranial radiotherapy, are unlikely to have as elevated a risk of LDs.
Furthermore, several questions in our survey had a low response
rate, and therefore are less generalizable, which is why we included
this information in Table II [28,30]. Despite these limitations,
the relationship between CNS tumors and LDs is both highly
statistically and clinically significant.
Future Directions
Our results indicate that LDs are common in survivors of
pediatric brain tumors, which we hypothesize is a result of
neurocognitive deficits in these patients. Therefore, we believe
future research should investigate this potential relationship, and
whether preventing or treating neurocognitive deficits reduces the
risk of LDs. Future research is also needed to investigate if screening
for LDs and offering potential interventions is beneficial. Possible
interventions include the provision of specific counseling and
education services for ASCC in the LEC and the development of a
legal aid service. Given our results, it is likely that improved
identification and management of legal difficulties will improve the
quality of life of survivors of childhood brain tumors.
CONCLUSION
Legal difficulties are common in ASCC, especially those with
CNS tumors. In addition, legal difficulties are correlated with worse
quality of life. Furthermore, lower quality of life is associated
with increased use of resources, including family physician visits.
We believe these results justify the development of a legal resource
centre in British Columbia for adult survivors of pediatric
malignancies. We plan to pursue this centre as a joint collaboration
between the BC Cancer Agency, the BC Children’s Hospital, and the
University of British Columbia’s Faculty of Law. Furthermore, we
believe that research should focus on: (1) confirming our findings,
(2) Studying the relationship between neurocognitive function and
the prevalence of legal difficulties (3) exploring the relationship
between legal difficulties and quality of life, (4) improving access to
legal resources, and (5) improving the quality of legal resources for
ASCC.
ACKNOWLEDGMENT
Dr. Olson would like to thank E. Francis Cook, Garret
Fitzmaurice, Tobias Kurth, and John Seeger from the Harvard
School of Public Health for their instruction in regression modeling
and propensity score analysis.
REFERENCES
1. Smith M, Hare ML. An overview of progress in childhood cancer
survival. J Pediatr Oncol Nurs 2004;21:160–164.
2. Wallace H, Green D, editors. Late effects of childhood cancer.
London: Hodder Arnold; 2004. p. 416.
Pediatr Blood Cancer DOI 10.1002/pbc
TABLE V. Relationship Between Patient Variables and Quality of Life
Variable
Quality of life score
If yes (s.e.) If no (s.e.) P-Value
Legal difficulties 79.96 (3.82) 91.83 (2.10) 0.005
Diagnosis age< 5 86.48 (3.31) 88.02 (2.09) 0.682
CNS tumor 83.71 (3.47) 89.25 (2.02) 0.147
Chemotherapy 88.92 (2.00) 82.19 (4.15) 0.113
RT 87.09 (1.88) 94.80 (5.38) 0.318
CNS RT 87.45 (2.14) 89.48 (2.75) 0.605
Female 82.95 (2.92) 91.89 (1.85) 0.011
Relapse 93.10 (2.84) 86.74 (1.97) 0.256
Secondary tumor 87.38 (3.94) 87.49 (1.98) 0.984
CNS, central nervous system; RT, Radiotherapy; s.e., standard error.
442 Olson et al.
3. Bhatia S, Landier W. Evaluating survivors of pediatric cancer.
Cancer J 2005;11:340–354.
4. Bhatia S, Meadows AT. Long-term follow-up of childhood cancer
survivors: Future directions for clinical care and research. Pediatr
Blood Cancer 2006;46:143–148.
5. Geenen MM, CardousUbbink MC, Kremer LCM, et al. Medical
assessment of adverse health outcomes in long-term survivors of
childhood cancer. JAMA 2007;297:2705–2715.
6. Maunsell E, Pogany L, Barrera M, et al. Quality of life among long-
term adolescent and adult survivors of childhood cancer. J Clin
Oncol 2006;24:2527–2535.
7. Alvarez JA, Scully RE, Miller TL, et al. Long-term effects of
treatments for childhood cancers. Curr Opin Pediatr 2007;19:23–
31.
8. Ness KK, Gurney JG, Zeltzer LK, et al. The impact of limitations in
physical, executive, and emotional function on health-related
quality of life among adult survivors of childhood cancer: A report
from the childhood cancer survivor study. Arch Phys Med Rehabil
2008;89:128–136.
9. Anderson DM, Rennie KM, Ziegler RS, et al. Medical and
neurocognitive late effects among survivors of childhood central
nervous system tumors. Cancer 2001;92:2709–2719.
10. Blaauwbroek R, Groenier KH, Kamps WA, et al. Late effects in
adult survivors of childhood cancer: The need for life-long follow-
up. Ann Oncol 2007;18:1898–1902.
11. Barrera M, Shaw AK, Speechley KN, et al. Educational and social
late effects of childhood cancer and related clinical, personal, and
familial characteristics. Cancer 2005;104:1751–1760.
12. Monaco GP, Fiduccia D, Smith G. Legal and societal issues facing
survivors of childhood cancer. Pediatr Clin North Am 1997;44:
1043–1058.
13. Crom DB, Lensing SY, Rai SN, et al. Marriage, employment, and
health insurance in adult survivors of childhood cancer. J Cancer
Surviv 2007;1:237–245.
14. Hoffman B. Employment discrimination: Another hurdle for
cancer survivors. Cancer Invest 1991;9:589–595.
15. Ehrmann-Feldmann D, Spitzer WO, Del Greco L, et al. Perceived
discrimination against cured cancer patients in the work force. Can
Med Assoc J 1987;136:719–723.
16. Cella DF, Tulsky DS, Gray G, et al. The functional assessment of
cancer therapy scale: Development and validation of the general
measure. J Clin Oncol 1993;11:570–579.
17. Weitzner M, Meyers C, Gelke C, et al. The functional assessment of
cancer therapy (FACT) scale. Development of a brain subscale and
revalidation of the general version (FACT-G) in patients with
primary brain tumors. Cancer 1995;75:1151–1161.
18. Olson RA, Iverson G, Parkinson M, et al. Investigation of cognitive
screening measures in patients with brain tumors: Diagnostic
accuracy and correlation with quality of life. J Clin Oncol (Meet
Abstr) 2009;27:e13000.
19. Landier W, Wallace WH, Hudson MM. Long-term follow-up of
pediatric cancer survivors: Education, surveillance, and screening.
Pediatr Blood Cancer 2006;46:149–158.
20. Oeffinger KC, Mertens AC, Sklar CA, et al. Chronic health
conditions in adult survivors of childhood cancer. N Engl J Med
2006;355:1572–1582.
21. Trotti A, Colevas AD, Setser A, et al. CTCAE v3.0: Development
of a comprehensive grading system for the adverse effects of cancer
treatment. Semin Radiat Oncol 2003;13:176–181.
22. Cepeda MS, Boston R, Farrar JT, et al. Comparison of logistic
regression versus propensity score when the number of events is
low and there are multiple confounders. Am J Epidemiol 2003;
158:280–287.
23. Maunsell E, Drolet M, Brisson J, et al. Work situation after breast
cancer: Results from a population-based study. J Natl Cancer Inst
2004;96:1813–1822.
24. Rothstein MA, Kennedy K, Ritchie KJ, et al. Are cancer patients
subject to employment discrimination? Oncology (Williston)
1995;9:1303–1306.
25. Glauser TA, Packer RJ. Cognitive deficits in long-term survivors of
childhood brain tumors. Childs Nerv Syst 1991;7:2–12.
26. Roman DD, Sperduto PW. Neuropsychological effects of cranial
radiation: Current knowledge and future directions. Int J Radiat
Oncol Biol Phys 1995;31:983–998.
27. Evans AS. Causation and disease: The Henle-Koch postulates
revisited. Yale J Biol Med 1976;49:175–195.
28. Olson R, Parkinson M, McKenzie M. Selection bias introduced by
neuropsychological assessments. Can J Neurol Sci 2010;37:264–
268.
29. Landier W, Bhatia S, Eshelman DA, et al. Development of risk-
based guidelines for pediatric cancer survivors: The Children’s
Oncology Group long-term follow-up guidelines from the Child-
ren’s Oncology Group late effects committee and nursing
discipline. J Clin Oncol 2004;22:4979–4990.
30. Ness KK, Leisenring W, Goodman P, et al. Assessment of selection
bias in clinic-based populations of childhood cancer survivors: A
report from the childhood cancer survivor study. Pediatr Blood
Cancer 2009;52:379–386.
Pediatr Blood Cancer DOI 10.1002/pbc
Legal Problems in Pediatric Cancer Survivors 443