Publications by authors named "Karthik D Nath"

2 Publications

  • Page 1 of 1

A 14-year retrospective analysis of indications and outcomes of autologous haemopoietic stem cell transplantation in regional Queensland: a single-centre experience.

Intern Med J 2020 02;50(2):214-221

Icon Group, Brisbane, Queensland, Australia.

Background: The Townsville Hospital is a tertiary hospital in North Queensland with one of the largest regional transplant centres in Australia, performing primarily autologous haemopoietic stem cell transplants (HSCT) for various haematological malignancies.

Aims: This single-centre, retrospective, observational study aims to describe the activity and outcomes of autologous HSCT at The Townsville Hospital between 2003 and 2017 to verify safety standards.

Methods: Patient-level data were collected, including demographics, frequency and indication for transplant, conditioning, current clinical status and cause of death. Key outcomes included overall survival, non-relapse mortality, incidence of therapy-related neoplasm and causes of death. Progression-free survival in the multiple myeloma (MM) subgroup was also assessed.

Results: There were 319 autologous HSCT in 286 patients, with a median age of 58 years (range 14-71 years); 62% of patients were male. Indications for transplantation were: MM 53.7%, non-Hodgkin lymphoma 29.4%, Hodgkin lymphoma 5.0% and other 11.9%. Causes of death were: disease progression/relapse (65.2%), second malignancy (17.0%), infection (9.8%) and other (8.0%). Non-relapse mortality was 1.2% (95% confidence interval 0.4-3.0) and 3.2% (1.7-5.7) at 100 days and 1 year, respectively, post-HSCT. Overall survival at 2 years was 81.0% (73.8-86.4) for MM and 69.6% (58.8-78.1) for non-Hodgkin lymphoma. The median progression-free survival in the MM cohort was 3.3 years.

Conclusion: The Townsville Hospital transplant centre provides an important transplant service in regional Queensland, with outcomes comparable to national data. We reported a relatively high rate of second malignancy as a cause of death.
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http://dx.doi.org/10.1111/imj.14395DOI Listing
February 2020

Clinical factors associated with the humoral immune response to influenza vaccination in chronic obstructive pulmonary disease.

Int J Chron Obstruct Pulmon Dis 2014 24;9:51-6. Epub 2013 Dec 24.

The University of Queensland (School of Medicine), Brisbane, QLD, Australia ; Princess Alexandra Hospital, Brisbane, QLD, Australia.

Background And Objective: Individuals with chronic obstructive pulmonary disease (COPD) are at a high risk of developing significant complications from infection with the influenza virus. It is therefore vital to ensure that prophylaxis with the influenza vaccine is effective in COPD. The aim of this study was to assess the immunogenicity of the 2010 trivalent influenza vaccine in persons with COPD compared to healthy subjects without lung disease, and to examine clinical factors associated with the serological response to the vaccine.

Methods: In this observational study, 34 subjects (20 COPD, 14 healthy) received the 2010 influenza vaccine. Antibody titers at baseline and 28 days post-vaccination were measured using the hemagglutination inhibition assay (HAI) assay. Primary endpoints included seroconversion (≥4-fold increase in antibody titers from baseline) and the fold increase in antibody titer after vaccination.

Results: Persons with COPD mounted a significantly lower humoral immune response to the influenza vaccine compared to healthy participants. Seroconversion occurred in 90% of healthy participants, but only in 43% of COPD patients (P=0.036). Increasing age and previous influenza vaccination were associated with lower antibody responses. Antibody titers did not vary significantly with cigarette smoking, presence of other comorbid diseases, or COPD severity.

Conclusion: The humoral immune response to the 2010 influenza vaccine was lower in persons with COPD compared to non-COPD controls. The antibody response also declined with increasing age and in those with a history of prior vaccination.
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http://dx.doi.org/10.2147/COPD.S53590DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3875241PMC
August 2014