David Johnson

Prof. David Johnson

orcid

Research Focus & Metrics

Academic Career Length

46Years (1981-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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12 August 2010 in New England Journal of Medicine
Verified
Journal Article
Closed access
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BCBruce A. Cooper
Bruce A. Cooper
PBPauline Branley
Pauline Branley
LBLiliana Bulfone
Liliana Bulfone
JCJohn F. Collins
John F. Collins
JCJonathan C. Craig
Jonathan C. Craig
CPCarol A. Pollock
Carol A. Pollock
In clinical practice, there is considerable variation in the timing of the initiation of maintenance dialysis for patients with stage V chronic kidney disease, with a worldwide trend toward early initiation. In this study, conducted at 32 centers in Australia and New Zealand, we examined whether the timing of the initiation of maintenance dialysis influenced survival among patients with chronic kidney disease.

10 March 2022 in Peritoneal Dialysis International: Journal of the International Society for Peritoneal Dialysis
Verified
Journal Article
Open access
Philip Kam-tao LiPhilip Kam-tao Li
Philip Kam-tao Li
KCKai Ming Chow
Kai Ming Chow
YCYeoungjee Cho
Yeoungjee Cho
SFStanley Fan
Stanley Fan
AFAna E Figueiredo
Ana E Figueiredo
DJDavid Johnson
David Johnson
Peritoneal dialysis (PD)-associated peritonitis is a serious complication of PD and prevention and treatment of such is important in reducing patient morbidity and mortality. The ISPD 2022 updated recommendations have revised and clarified definitions for refractory peritonitis, relapsing peritonitis, peritonitis-associated catheter removal, PD-associated haemodialysis transfer, peritonitis-associated death and peritonitis-associated hospitalisation. New peritonitis categories and outcomes including pre-PD peritonitis, enteric peritonitis, catheter-related peritonitis and medical cure are defined. The new targets recommended for overall peritonitis rate should be no more than 0.40 episodes per year at risk and the percentage of patients free of peritonitis per unit time should be targeted at >80% per year. Revised recommendations regarding management of contamination of PD systems, antibiotic prophylaxis for invasive procedures and PD training and reassessment are included. New recommendations regarding management of modifiable peritonitis risk factors like domestic pets, hypokalaemia and histamine-2 receptor antagonists are highlighted. Updated recommendations regarding empirical antibiotic selection and dosage of antibiotics and also treatment of peritonitis due to specific microorganisms are made with new recommendation regarding adjunctive oral N-acetylcysteine therapy for mitigating aminoglycoside ototoxicity. Areas for future research in prevention and treatment of PD-related peritonitis are suggested.

1 July 2010 in Peritoneal Dialysis International: Journal of the International Society for Peritoneal Dialysis
Verified
Journal Article
Open access
PDF file
Philip Kam-tao LiPhilip Kam-tao Li
Philip Kam-tao Li
CSC.C. Szeto
C.C. Szeto
BPBeth Piraino
Beth Piraino
JBJudith Bernardini
Judith Bernardini
AFAna E. Figueiredo
Ana E. Figueiredo
DSDirk G. Struijk
Dirk G. Struijk

22 February 2022 in Nature Reviews Nephrology
Verified
Journal Article
Open access
PDF file
ABAminu K. Bello
Aminu K. Bello
IOIkechi G. Okpechi
Ikechi G. Okpechi
MOMohamed A. Osman
Mohamed A. Osman
YCYeoungjee Cho
Yeoungjee Cho
HHHtay Htay
Htay Htay
DJDavid Johnson
David Johnson
Haemodialysis (HD) is the commonest form of kidney replacement therapy in the world, accounting for approximately 69% of all kidney replacement therapy and 89% of all dialysis. Over the last six decades since the inception of HD, dialysis technology and patient access to the therapy have advanced considerably, particularly in high-income countries. However, HD availability, accessibility, cost and outcomes vary widely across the world and, overall, the rates of impaired quality of life, morbidity and mortality are high. Cardiovascular disease affects more than two-thirds of people receiving HD, is the major cause of morbidity and accounts for almost 50% of mortality. In addition, patients on HD have high symptom loads and are often under considerable financial strain. Despite the many advances in HD technology and delivery systems that have been achieved since the treatment was first developed, poor outcomes among patients receiving HD remain a major public health concern. Understanding the epidemiology of HD outcomes, why they might vary across different populations and how they might be improved is therefore crucial, although this goal is hampered by the considerable heterogeneity in the monitoring and reporting of these outcomes across settings.

17 April 2012 in Nephrology
Verified
Journal Article
Closed access
PDF file
DSDavid M Small
David M Small
JCJeff S Coombes
Jeff S Coombes
NBNigel Bennett
Nigel Bennett
DJDavid Johnson
David Johnson
GGGlenda Gobe
Glenda Gobe

25 February 2008 in BMJ
Verified
Journal Article
Open access
PDF file
GSGiovanni F.M. Strippoli
Giovanni F.M. Strippoli
SNSankar D Navaneethan
Sankar D Navaneethan
DJDavid Johnson
David Johnson
VPVlado Perkovic
Vlado Perkovic
FPFabio Pellegrini
Fabio Pellegrini
JCJonathan C Craig
Jonathan C Craig
Objective To analyse the benefits and harms of statins in patients with chronic kidney disease (pre-dialysis, dialysis, and transplant populations). Design Meta-analysis. Data sources Cochrane Central Register of Controlled Trials, Medline, Embase, and Renal Health Library (July 2006). Study selection Randomised and quasi-randomised controlled trials of statins compared with placebo or other statins in chronic kidney disease. Data extraction and analysis Two reviewers independently assessed trials for inclusion, extracted data, and assessed trial quality. Differences were resolved by consensus. Treatment effects were summarised as relative risks or weighted mean differences with 95% confidence intervals by using a random effects model. Results Fifty trials (30 144 patients) were included. Compared with placebo, statins significantly reduced total cholesterol (42 studies, 6390 patients; weighted mean difference −42.28 mg/dl (1.10 mmol/l), 95% confidence interval −47.25 to −37.32), low density lipoprotein cholesterol (39 studies, 6216 patients; −43.12 mg/dl (1.12 mmol/l), −47.85 to −38.40), and proteinuria (g/24 hours) (6 trials, 311 patients; −0.73 g/24 hour, −0.95 to −0.52) but did not improve glomerular filtration rate (11 studies, 548 patients; 1.48 ml/min (0.02 ml/s), −2.32 to 5.28). Fatal cardiovascular events (43 studies, 23 266 patients; relative risk 0.81, 0.73 to 0.90) and non-fatal cardiovascular events (8 studies, 22 863 patients; 0.78, 0.73 to 0.84) were reduced with statins, but statins had no significant effect on all cause mortality (44 studies, 23 665 patients; 0.92, 0.82 to 1.03). Meta-regression analysis showed that treatment effects did not vary significantly with stage of chronic kidney disease. The side effect profile of statins was similar to that of placebo. Most of the available studies were small and of suboptimal quality; mortality data were provided by a few large trials only. Conclusion Statins significantly reduce lipid concentrations and cardiovascular end points in patients with chronic kidney disease, irrespective of stage of disease, but no benefit on all cause mortality or the role of statins in primary prevention has been established. Reno-protective effects of statins are uncertain because of relatively sparse data and possible outcomes reporting bias.