Title: Importance of Clinical Trials in Breast Cancer in Developing Countries
1Importance of Clinical Trials in Breast Cancer in
Developing Countries
- Zeba Aziz
- Professor of Oncology
- Allama Iqbal Medical College
- Lahore
2The Global burden of cancer at the Dawn of the
21st Century
Year Incidence Million/year Mortality (million/year) Mortality (million/year) Author
Total Industrialized Countries Developing Countries
1975 5.9 - - - Boycle 1997
1980 6.4 4.3 2.1 2.1 Tomatis 1990
1985 7.6 5.1 2.2 2.9 Pisani 1993
1990 8.4 6.0 2.4 2.9 Murray 1997
1996 10.0 6.4 2.6 3.8 WHO 1997
2020 15-18 10.0 2.5 7.5 WHO 1997
3Global Breast Cancer Burden
- Incidence 1.1 million new cases diagnosed in
2002, about 50 in the developing world. - Three out of 4 breast cancer deaths occur in the
developing world. - In some parts, over 75 of new breast cancers are
diagnosed in stages III and IV. - Mortality to incidence ratios range from 45 to
88. (Courtesy Dr Hortobagyi)
4Global Differences in Breast Cancer Diagnosis and
Outcomes Survival
- Estimated mortality-to-incidence ratios are
generally lower in developed regions1
USA (8388)2
Europe (6083)2
ASR 5-year survival
Developing countries (4572)3
Women diagnosed 19901994 19821992
1Shibuya, et al. BMC Cancer 2002237 2Coleman,
et al. Ann Oncol 200314(Suppl 5)V128V149
3Sankaranarayanan, et al. IARC Sci Publ
199814513573
5GLOBAL STATISTICSBreast cancer mortality in
different countries
SLIDE CREDITGilberto Schwartsmann
6GLOBAL STATISTICSMortality vs. Degree of
economic development
SLIDE CREDITGilberto Schwartsmann
7Cancer Detection Early or Too Late?
- The situation in developing countries varies
dramatically. Numerous reasons for late
presentation - 1.Low level of public education.
- 2.Uninformed physicians.
- 3. Inadequate health facilities
particularly rural areas in developing
countries. - 4.Use of traditional medicines.
8Treatment of Cancer in Developing Countries
- Available data show that the level of cancer
treatment is not only lower but markedly lower
than that in the industrialized world. - Lack of surgical oncology.
- Lack of uniformity of radiation facilities.
- Patient SES.
- Alternative medicines.
- Improvement of treatment facilities by health
transfer technology. - Establishment of priorities.
- Guidelines or recommendations.
- Local protocols.
- Local and regional collaborations.
9Decline in Breast Cancer Mortality in Developed
Countries
- Breast cancer mortality has declined in
developed countries due to - -Earlier detection of palpable and non
palpable cancers. - -Early extirpation of palpable tumors
- -Reduction of burden of micro-metastasis
. - -Leads to earlier use of adjuvant
therapy. - -Improvements in cancer treatment.
10Epidemiology of Research in Low and Middle Income
Countries (LAMI)
- Over 85 of the worlds population lives in the
153 countries (World Bank Criteria). - Research is needed to meet the enormous and unmet
health needs of LAMI countries. - Scientific journals play an important role in
production and dissemination of research. - The gap between these and high income countries
is widening in terms of publications. - At present only a fraction of research published
in widely accessible oncology journals is from or
about these countries.
11Current Scenario of Research in Developing
Countries
- Industry sponsored research accounts for gt95
.Open labeled Phase IV studies for marketing of
new drugs. - No attention paid to the relevance of the
study with reference to the requirements. - Minimal attention paid to develop infrastructure.
- No training of local CROs, doctors , nurses etc
on research methodologies. - Lucrative and easy to conduct.
- Patronizing attitude.
12Current Scenario of Research in Developing
Countries (contd.)
- Academic research activities are mainly limited
to observational studies - On epidemiology.
- Few studies have survival or outcome analysis.
- Less than 1 are interventional trials.
- Characterized by poor quality due to lack of
training in research methodology, guidance, lack
of funds, ignorance of recent publications.
13Number of Biomedical Research Articles
Published by Investigators in High-Income
Countries and in Developing Countries.
High-Income Countries Developing Countries Variable (N54) (N154) Research articles published no./total 3873/4029 (96.1) 156/4029 (3.9) no. () Countries represented in publications- 28/54 (51.9) 31/154 (20.1) no./total no. () Top 5 countries contributing articles- United States- 2390/3873 (61.7) China -24/156 (15.4) no./total no. () United Kingdom -544/3873 (14.0) Turkey 18/156 (11.5) Canda-160/3873 (4.1) South Africa 17/156 (10.9) Australia -154/3873 (4.0) Hungary 11/156 (7.0) The Netherlands 109/3873 (2.8) Philippines 10/156 (6.4) Borry et al, NEJM 3538,2005
14Developing Countries Bioethical
Research(1990-2003)
- Less than 10 of research and development funds
are dedicated to addressing problems responsible
for 90 of worlds burden of disease. - The number of publications have not increased.
- No publications from 79.9 of developing
countries. - REMEDY Inclusion of internationally
representative members on editorial boards,
partnerships between researchers from high income
and DC and twinning arrangements. -
Borry et al, NEJM 3538,2005
15Articles published from Developing Countries on
Breast Cancer (n141) 1979-04.
- 1979-1989----11
- 1990-2000----70
- 2001-2004----59
- A major problem is finding publications in small
non-indexed journals of developing countries.
16Audit of Research on Breast Cancer in Developing
Countries (1979-04).
- Total no. of articles141
- Origin of study Developing countries74(52.4)
- Developed
countries50(35.4) - IARC WHO17(12.2)
- On Breast Cancer only 82(58.1)
- General with breast cancer included59(42)
- Asia contributed 68 (48), Middle East
11(7.8),Africa12(8.5) South America 9 (6.3)
17Audit of Research on Breast Cancer in Developing
Countries (n141,1979-04).
- Epidemiology52(36.8)
- Review15(10.6)
- Observational21(14.8)
- Education14(9.9)
- Screening7(4.9)
- Case Control12(8.5)
- Treatment Surgery3 (2.12),
Chemotherapy5 (3.5) - Outcome data17(12.3)
18Problems of Researchers in Developing Countries
- Lack of initiative.
- Poor institutional structure.
- Lack of funding.
- No training in proposal/grant writing.
- Lack of mentors and support.
- Hopeless career structure.
- Very little research culture.
- English as a second language.
19Problems of Researchers in Developing Countries
- Publication barriers include
-
- 1. Lack of guidance in preparing manuscripts.
- 2. Fear of criticism.
- 3. Use of English as second language.
- 3. Ignorance of how journals operate and
where to publish. - 4. Perceived bias against research from
developing countries as reviewers do not
understand the difficulties of carrying out
research and also question the validity of data .
20Requirements for a Researcher in Developing
Country
- Imagination/Vision.
- Perseverance.
- Integrity/honesty.
- Belief in oneself.
- Ability to face rejections.
- Devotion.
- Constant self improvement.
- Update of knowledge/new evidence.
- Critical self appraisal of achievements and
setback.
21Types of Clinical Trials
- ObservationalEpidemiology, survival.
- Screening Early Diagnosis.
- Interventional Phase I,II, III.
- Palliative.
- Economic feasibility Audit of our trials are
very important .
22Breast Cancer Age, Tumor Size Stage
-
- Number Age Tumor size (cm) Early
disease() Late disease() Author - 774 49 5.4
40 60
Hisham(2004) - 423 45
28 46
Rana(1998) - 3320 45
23.7 60.2
Shanta(12000) - 286 45 4.2
56.1 43.9
Aziz(2001) - 152 48 4.6
49.3 50.7
Al-Moundhri(2004)
Large tumors, advanced disease younger age at
presentation are common to all developing
countries
23(No Transcript)
24Early Detection Strategies with and without
Screening
25Problems of Screening in Developing Countries
- Screening requires sophisticated technology, high
level of expertise which should be available for
at least 80 of target population. - Screening by mammography reduces mortality by
25. - Etiology of breast cancer is limited.
- Some factors e.g. parity, age at first full term
pregnancy are not modifiable for purposes of
cancer prevention. - At present these conditions cannot be met in our
countries.
26Breast Cancer in the Third World-Risk Factors
Prevention
- Poverty Very important overall cancer risk
factor due to a complex play of environmental and
host factors. Unfortunately we are far from
controlling poverty. - Public education Early detection and prevention
only possible by changing life styles of educated
people. - Life Styles Dietary changes and alteration in
patterns of reproduction are contributing to
increasing risk . - Others Intermarriages, unknown factors.
27Breast Cancer Early Detection Programs
- Early Detection Identification of breast cancer
at a point at a point in its natural history
where it can be treated with techniques which
have the least physical impact and maximum chance
of producing cure. - Best method to reduce breast cancer mortality is
early detection combined with proper treatment. - Early detection has limited value if proper
treatment for breast cancer is not available. - In DC countries with low incidence of breast
cancer, limited resources maybe better invested
in early detection strategies than in screening
as the latter requires considerable resources.
28Clinician Response to Breast Cancer in Pakistan
A Cross Sectional SurveyNCI US, MD Anderson
AIMC
- Objectives This study concentrated primarily on
learning about the epidemiology of breast cancer,
educating physicians as a part of an effort to
increase patient survival rates, and
understanding the process by which physicians
refer patients for epidemiologic investigations. - Methods A preliminary survey was administered
to 183 participants in which segments are divided
into knowledge, attitude and practice sections
with sub-divided topics including diagnosis,
treatment, and symptoms.
29Clinician Response to Breast Cancer in Pakistan
A Cross Sectional Survey
- Results Over 90 of participants view clinical
and self breast examination as important cancer
risk prevention practice. Yet, only 25 of the
cluster reported performing regular CBE with a
gender ratio of 1.3 to 1 male to female
respondents.. - Almost 40 of physicians lacked knowledge
about inflammatory and locally advanced breast
cancer and reported a lack of information about
LABC despite the high prevalence in the country. - Conclusions. This study highlights the need for
increased awareness about breast cancer by
primary care practitioner in Pakistan, and the
need for early detection through regular
screening. Primary care physicians need to be
more aware of the epidemiology, diagnosis, and
management of breast cancer.
30General Issues for Consideration in Designing
International Trials
- Is the disease similar in different countries?
- Is the trial relevant to the country are the
risk factors the - same?
- Is the treatment relevant and are the outcomes
approximately the same? - Do the culture and infrastructure exist to carry
out this trial? - Are investigators in LAMI willing/trained to
conduct trials according to international
standards. - Determining the difference between wants and
needs is crucial to providing effective health
care solutions in a developing country.
Dr. Salim Yusuf ,(McMaster University, Canada)
31Advantages for Research Researcher in
Developing Countries
- For a defined population.
- In area of interest.
- Need.
- Development of infrastructure.
- Collaboration, training and mentoring.
- Discipline.
- Highlight of deficiencies.
- Most important mental development and ability to
think
32Breast Cancer , Clinical Trials INCTR
- Epidemiology.
- Locally Advanced Breast Cancer.
- Resource Sparing Radiotherapy in Early Breast
Cancer.
33Conclusions
- Research directed towards and applicable to our
patients is extremely important to develop EBM in
developing countries. - It should be economically viable in our
countries. - Audit of our research is essential.
- Infrastructure needs to be developed.
34 Projected Change in BREAST
CANCER Incidence
2002-2010(World)
20 26
1.15 Million
1.45 Million
1.38 Million
demographic trend
based on estd. Change 1990 - 2002
Courtesy Dr. Max Parkins
35Last but not least research for us in developing
countries, is not a luxury but a necessity.