Figure 1
Relationship between the countries involved in international research collaborations. Circle sizes represent number of country publications; line thickness represents number of collaborations between linked countries.
Figure 2
Number and percentage of articles with international collaborations inside South America (A) and outside South America (B) over the years.
Table 1
Association between international collaborations and article characteristics.
| CHARACTERISTICS | INTERNATIONAL COLLABORATION | p VALUE | |
|---|---|---|---|
| YES (n = 117) | NO (n = 524) | ||
| MEDIAN (p25–p75)2 | |||
| Citations in two years in WOS | 2 (1–6) | 1 (0–2) | <0.0011 |
| Citations in two years in GS | 4.5 (2–10) | 2 (0–5) | <0.0011 |
| Citations in two years in Scopus | 3 (1–6) | 1 (0–2) | <0.0011 |
| Current Journal IF - WOS | 2.75 (1.95–3.38) | 1.70 (0.98–2.45) | <0.0011 |
| Current Journal IF - SJR | 2.18 (0.85–3.29) | 0.74 (0.51–1.68) | <0.0011 |
| N (%) | |||
| Journal with IF - WOS | <0.0012 | ||
| Yes | 82 (70.1) | 155 (29.6) | |
| No | 35 (29.9) | 369 (70.4) | |
| PubMed indexed journal | <0.0012 | ||
| Yes | 89 (76.1) | 218 (41.6) | |
| No | 28 (23.9) | 306 (58.4) | |
| Study with funding | <0.0012 | ||
| Yes | 48 (41.0) | 51 (9.7) | |
| No | 69 (59.0) | 473 (90.3) | |
| Systematic review | 0.4943 | ||
| Yes | 4 (3.4) | 11 (2.1) | |
| No | 113 (96.6) | 513 (97.9) | |
| Randomized Clinical Trial | 0.0022 | ||
| Yes | 6 (5.1) | 5 (1.0) | |
| No | 111 (94.9) | 519 (99.0) | |
| Cohort | <0.0012 | ||
| Yes | 12 (10.3) | 15 (2.9) | |
| No | 105 (89.7) | 509 (97.1) | |
| Qualitative | <0.0013 | ||
| Yes | 6 (5.1) | 152 (29.0) | |
| No | 111 (94.9) | 372 (71.0) | |
| Specific to oncology | 0.0462 | ||
| Yes | 44 (37.6) | 148 (28.2) | |
| No | 73 (62.4) | 376 (71.8) | |
[i] Abbreviations: p25 = 25th percentile; p75 = 75th percentile; WOS = Web of Science; GS = Google Scholar, IF = impact factor; SJR = Scimago Journal Rank. 1 Mann-Whitney U Test. 2 Chi-square test. 3 Fisher exact test.
Table 2
Correlation between numbers of countries involved in international research collaborations and two year citation metrics.
| CITATION METRICS | NUMBERS OF COUNTRIES INVOLVED IN RESEARCH COLLABORATION | |||
|---|---|---|---|---|
| INSIDE SOUTH AMERICA | OUTSIDE SOUTH AMERICA | |||
| RHO | p-VALUE | RHO | p-VALUE | |
| Google Scholar | 0.117 | 0.003 | 0.291 | <0.001 |
| Scopus | 0.167 | 0.001 | 0.402 | <0.001 |
| WOS | 0.166 | 0.001 | 0.419 | <0.001 |
[i] Legend: WOS = Web of Science.
Table 3
The 15 top articles according to the number of total citations in Web of Science over the analyzed period.
| RANKING | TOTAL CITATIONS | TYPE OF IRC | JOURNAL | YEAR | SA COUNTRY | STUDY COORDINATING GROUP | ||
|---|---|---|---|---|---|---|---|---|
| WOS | SCOPUS | GS | ||||||
| 1 | 109 | 155 | 231 | IRC-IO | Journal of Clinical Oncology | 2004 | Chile, Argentina, Colombia, Brazil | MDACC (Tx, USA) |
| 2 | 99 | 128 | 192 | IRC –O | Palliative Medicine | 2000 | Argentina | MDACC (Tx, USA) |
| 3 | 98 | 134 | 194 | No IRC | Journal of Pain and Symptom Management | 2006 | Argentina | University of Buenos Aires (Argentina) |
| 4 | 64 | 70 | 80 | IRC-IO | Cancer | 2015 | Brazil, Chile | MDACC (Tx, USA) |
| 5 | 54 | 55 | 86 | No IRC | BMC Medical Research Methodology | 2014 | Brazil | Barretos Cancer Hospital (Brazil) |
| 6 | 54 | 61 | 66 | IRC-O | JAMA Oncology | 2015 | Chile | MDACC (Tx, USA) |
| 7 | 51 | 60 | 77 | IRC-O | Journal of Clinical Oncology | 2013 | Chile | MDACC (Tx, USA) |
| 8 | 50 | 64 | 86 | IRC-IO | Journal of Pain and Symptom Management | 2004 | Colombia, Argentina, Chile | MDACC (Tx, USA) |
| 9 | 46 | 66 | 572 | No IRC | Pediatric Critical Care Medicine | 2003 | Argentina | Hospital de Pediatría JP Garrahan, Buenos Aires (Argentina) |
| 10 | 46 | 52 | 101 | No IRC | Psycho-Oncology | 2012 | Chile | PUC-Chile, Santiago (Chile) |
| 11 | 46 | 51 | 73 | No IRC | International Journal of Palliative Nursing | 2000 | Argentina | University of Buenos Aires (Argentina) |
| 12 | 36 | 37 | 65 | IRC-O | Journal of Pain and Symptom Management | 2015 | Brazil | MDACC (Tx, USA) |
| 13 | 36 | 46 | 554 | No IRC | Pediatric Critical Care Medicine | 2005 | Brazil | PUC-RS (Porto Alegre) |
| 14 | 35 | 44 | 69 | IRC-IO | The Oncologist | 2014 | Brazil, Chile | MDACC (Tx, USA) |
| 15 | 34 | 46 | 95 | IRC-O | Psycho-Oncology | 2012 | Colombia | Universidad Pontificia Bolivariana, Medellín (Colombia) |
[i] Legend: IRC = international research collaboration; IRC-I = international research collaboration inside South America; IRC-O = international research collaboration outside South America; IRC-IO = international research collaboration both inside and outside South America; MDACC = MD Anderson Cancer Center; Tx = Texas; USA = United States of America; PUC-Chile = Pontificia Universidad Católica de Chile; PUC-RS = Pontíficia Universidade Católica do Rio Grande do Sul; WOS = Web of Science; GS = Google Scholar; SA = South American.
Figure 3
Bibliographic map of co-authorship from publications on Palliative Care including at least on author from South America. Each author is represented by a circle, with the size of the circle representing number of publications. The closer, the greater the relationship between them. The colors represent the years the articles were published.