Disparities in the contribution of low- and middle-income countries to palliative care research

Palliative care research in Latin America and the Caribbean: from the beginning to the Declaration of Venice and beyond

BACKGROUND

Research in palliative care has increased significantly in the last decade, while the vast majority of the global disease burden occurs in developing countries.

AIMS

To explore the palliative care research activity in Latin America and the Caribbean (LAC) and its visibility in the international palliative care literature, with a special focus on research studies.

METHODS

A bibliometric analysis was conducted in MEDLINE(®), Embase(®), PsycINFO(®), and CINAHL(®). Inclusion criteria were: (1) articles published in peer-reviewed scientific journals; (2) main subject was palliative care; (3) research study; (4) the first author or coauthors was based in LAC; and/or (5) the data collected derived from LAC.

RESULTS

One hundred six articles from 10 countries were identified in the literature research. The first publication dates from 1989 and was a qualitative study in Brazil. This study shows a modest contribution of publications from LAC. However, the volume of publications within the region is distributed unequally, reflecting the heterogeneity of the region: Brazil published more than half of the articles, while 35 countries have no publications. Most of the studies were quantitative research, predominantly cross-sectional studies. Qualitative studies often used interviews. Health care service was the most researched issue. Seventy percent of studies were carried out in institutions.

CONCLUSIONS

Palliative care research should have a place in LAC. The development of a regional research agenda tailored to the needs and features of the region considering the health care structure and local resources available is indispensable.

Quantity, design, and scope of the palliative oncology literature

The current state of the palliative oncology literature is unclear. We examined and compared the quantity, research design, and research topics of palliative oncology publications in the first 6 months of 2004 with the first 6 months of 2009. We systematically searched MEDLINE, PsychInfo, EMBASE, ISI Web of Science, and CINAHL for original studies, review articles, and systematic reviews related to "palliative care" and "cancer" during the first 6 months of 2004 and 2009. Two physicians reviewed the literature independently and coded the study characteristics with high inter-rater reliability. We found a consistent decrease in the proportion of oncology studies related to palliative care between 2004 and 2009, despite an absolute increase in the total number of palliative oncology studies. Combining the two time periods, the most common original study designs were case report/series, cross-sectional studies, and qualitative studies. Randomized controlled trials comprised 6% of all original studies. The most common topics were physical symptoms, health services research, and psychosocial issues. Communication, decision making, spirituality, education, and research methodologies all represented <5% of the literature. Comparing 2004 with 2009, we found an increase in the proportion of original studies among all palliative oncology publications but no significant difference in study design or research topic. We identified significant deficiencies in the quantity, design, and scope of the palliative oncology literature. Further effort and resources are necessary to improve the evidence base for this important field.