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1

Time-dependent bias was common in survival analyses published in leading clinical journals

Carl van Walraven, Darryl Davis, Alan J. Forster, George A. Wells

Journal:

Journal of Clinical Epidemiology

Year:

2004

Language:

english

File:

PDF, 237 KB

english, 2004

2

Competing risk bias in Kaplan–Meier risk estimates can be corrected

van Walraven, Carl, Hawken, Steven

Journal:

Journal of Clinical Epidemiology

Year:

2016

Language:

english

File:

PDF, 288 KB

english, 2016

3

Quantifying the impact of survivor treatment bias in observational studies

Peter C. Austin, Muhammad M. Mamdani, Carl Van Walraven, Jack V. Tu

Journal:

Journal of Evaluation in Clinical Practice

Year:

2006

Language:

english

File:

PDF, 145 KB

english, 2006

4

Effect of a nurse team coordinator on outcomes for hospitalized medicine patients

Alan J. Forster, Heather D. Clark, Alex Menard, Natalie Dupuis, Robert Chernish, Natasha Chandok, Asmat Khan, Megan Letourneau, Carl van Walraven

Journal:

The American Journal of Medicine

Year:

2005

Language:

english

File:

PDF, 742 KB

english, 2005

5

Competing risk bias was common in Kaplan-Meier risk estimates published in prominent medical journals

van Walraven, Carl, McAlister, Finlay A.

Journal:

Journal of Clinical Epidemiology

Year:

2015

Language:

english

File:

PDF, 1.44 MB

english, 2015

6

Effect of Study Setting on Anticoagulation Control

van Walraven, Carl, Jennings, Alison, Oake, Natalie, Fergusson, Dean, Forster, Alan J.

Journal:

Year:

2006

Language:

english

File:

PDF, 195 KB

english, 2006

7

A Modification of the Elixhauser Comorbidity Measures into a Point System for Hospital Death Using Administrative Data

Carl van Walraven, Peter C. Austin, Alison Jennings, Hude Quan and Alan J. Forster

Journal:

Year:

2009

Language:

english

File:

PDF, 1.15 MB

english, 2009

8

A Modification of the Elixhauser Comorbidity Measures Into a Point System for Hospital Death Using Administrative Data

van Walraven, Carl, Austin, Peter C., Jennings, Alison, Quan, Hude, Forster, Alan J.

Journal:

Year:

2009

Language:

english

File:

PDF, 333 KB

english, 2009

9

A comparison of methods to correct for misclassification bias from administrative database diagnostic codes

Walraven, Carl van

Journal:

International Journal of Epidemiology

Year:

2017

Language:

english

File:

PDF, 413 KB

english, 2017

10

Derivation and Validation of a Novel Risk Score to Predict Overcorrection of Severe Hyponatremia

Woodfine, Jason D., Sood, Manish M., MacMillan, Thomas E., Cavalcanti, Rodrigo B., van Walraven, Carl

Journal:

Clinical Journal of the American Society of Nephrology

Year:

2019

Language:

english

File:

PDF, 531 KB

english, 2019

11

The independent association of provider and information continuity on outcomes after hospital discharge: Implications for hospitalists

Carl van Walraven, Monica Taljaard, Edward Etchells, Chaim M. Bell, Ian G. Stiell, Kelly Zarnke, Alan J. Forster

Journal:

Journal of Hospital Medicine

Year:

2010

Language:

english

File:

PDF, 183 KB

english, 2010

12

Influence of house-staff experience on teaching-hospital mortality: The “July Phenomenon” revisited

Carl van Walraven, Alison Jennings, Jenna Wong, Alan J. Forster

Journal:

Journal of Hospital Medicine

Year:

2011

Language:

english

File:

PDF, 777 KB

english, 2011

13

Why are investigations not recommended by practice guidelines ordered at the periodic health examination?

Carl van Walraven, Vivek Goel, Peter Austin

Journal:

Journal of Evaluation in Clinical Practice

Year:

2000

Language:

english

File:

PDF, 468 KB

english, 2000

14

Coding diagnoses and procedures using a high-quality clinical database instead of a medical record review

Carl van Walraven, Sylvie V. Demers

Journal:

Journal of Evaluation in Clinical Practice

Year:

2001

Language:

english

File:

PDF, 74 KB

english, 2001

15

The effect of participation in a weight loss programme on short-term health resource utilization

Carl van Walraven MD MSc FRCPC, Robert Dent MD FRCPC

Journal:

Journal of Evaluation in Clinical Practice

Year:

2002

Language:

english

File:

PDF, 75 KB

english, 2002

16

The effect of a hepatitis serology testing algorithm on laboratory utilization

Carl van Walraven, Vivek Goel

Journal:

Journal of Evaluation in Clinical Practice

Year:

2002

Language:

english

File:

PDF, 222 KB

english, 2002

17

Effect of discharge summary availability during post-discharge visits on hospital readmission

Carl van Walraven, Ratika Seth, Peter C. Austin, Andreas Laupacis

Journal:

Journal of General Internal Medicine

Year:

2002

Language:

english

File:

PDF, 100 KB

english, 2002

18

How far is the sternal angle from the mid-right atrium?

Ratika Seth, Peter Magner, Fred Matzinger, Carl van Walraven

Journal:

Journal of General Internal Medicine

Year:

2002

Language:

english

File:

PDF, 321 KB

english, 2002

19

Does adding risk-trends to survival models improve in-hospital mortality predictions? A cohort study

Jenna Wong, Monica Taljaard, Alan J Forster, Carl van Walraven

Journal:

BMC Health Services Research

Year:

2011

Language:

english

File:

PDF, 422 KB

english, 2011

20

The Procedural Index for Mortality Risk (PIMR): an index calculated using administrative data to quantify the independent influence of procedures on risk of hospital death

Carl van Walraven, Jenna Wong, Carol Bennett, Alan J Forster

Journal:

BMC Health Services Research

Year:

2011

Language:

english

File:

PDF, 286 KB

english, 2011

21

Outcomes of surveillance mammography after treatment of primary breast cancer: a population-based case series

Lawrence Paszat, Rinku Sutradhar, Eva Grunfeld, Corona Gainford, Veronique Benk, Susan Bondy, Doug Coyle, Claire Holloway, Carol Sawka, Rene Shumak, Katherine Vallis, Carl van Walraven

Journal:

Breast Cancer Research and Treatment

Year:

2009

Language:

english

File:

PDF, 175 KB

english, 2009

22

Anticoagulation Control in the Peri-Hospitalization Period

Carl van Walraven, Alan J. Forster

Journal:

Journal of General Internal Medicine

Year:

2007

Language:

english

File:

PDF, 776 KB

english, 2007

23

Identifying Patients with Post-discharge Care Problems Using an Interactive Voice Response System

Alan J. Forster, Loree Boyle, Kaveh G. Shojania, Thomas E. Feasby, Carl van Walraven

Journal:

Journal of General Internal Medicine

Year:

2009

Language:

english

File:

PDF, 147 KB

english, 2009

24

Do Advanced Cardiac Life Support Drugs Increase Resuscitation Rates From In-Hospital Cardiac Arrest?

Carl van Walraven, Ian G Stiell, George A Wells, Paul C Hébert, Katherine Vandemheen

Journal:

Annals of Emergency Medicine

Year:

1998

Language:

english

File:

PDF, 95 KB

english, 1998

25

Diabetic patients with prior specialist care have better glycaemic control than those with prior primary care

Baiju R. Shah, Janet E. Hux, Andreas Laupacis, Bernard Zinman Mdcm, Peter C. Austin, Carl Van Walraven

Journal:

Journal of Evaluation in Clinical Practice

Year:

2005

Language:

english

File:

PDF, 91 KB

english, 2005

26

Using an interactive voice response system to improve patient safety following hospital discharge

Alan J. Forster, Carl Van Walraven

Journal:

Journal of Evaluation in Clinical Practice

Year:

2007

Language:

english

File:

PDF, 79 KB

english, 2007

27

The association between continuity of care and outcomes: a systematic and critical review

Carl Van Walraven, Natalie Oake, Alison Jennings, Alan J. Forster

Journal:

Journal of Evaluation in Clinical Practice

Year:

2010

Language:

english

File:

PDF, 189 KB

english, 2010

28

Coding accuracy of abdominal aortic aneurysm repair procedures in administrative databases – a note of caution

Prasad Jetty, Carl van Walraven

Journal:

Journal of Evaluation in Clinical Practice

Year:

2011

Language:

english

File:

PDF, 109 KB

english, 2011

29

Derivation and Validation of a MEDLINE Search Strategy for Research Studies That Use Administrative Data

Carl Van Walraven, Carol Bennett, Alan J. Forster

Journal:

Health Services Research

Year:

2010

Language:

english

File:

PDF, 142 KB

english, 2010

30

Continuity of care and patient outcomes after hospital discharge

Carl van Walraven, Muhammad Mamdani, Jiming Fang, Peter C. Austin

Journal:

Journal of General Internal Medicine

Year:

2004

Language:

english

File:

PDF, 606 KB

english, 2004

31

Validation of a Discharge Summary Term Search Method to Detect Adverse Events

Alan J. Forster, Jason Andrade, Carl van Walraven

Journal:

Journal of the American Medical Informatics Association

Year:

2005

Language:

english

File:

PDF, 142 KB

english, 2005

32

Oral Anticoagulants vs. Aspirin for Stroke Prevention in Patients with Non-Valvular Atrial Fibrillation: The Verdict is in

Carl van Walraven, Robert G. Hart, Daniel E. Singer, Peter J. Koudstaal, Stuart Connolly

Journal:

Cardiac Electrophysiology Review

Year:

2003

Language:

english

File:

PDF, 70 KB

english, 2003

33

An hypothesis paper on practice environment and the provision of health care: Could hospital occupancy rates effect quality?

Alan Forster, Peter Tugwell, Carl Van Walraven

Journal:

Journal of Quality in Clinical Practice

Year:

2000

Language:

english

File:

PDF, 148 KB

english, 2000

34

The accuracy of using integrated electronic health care data to identify patients with undiagnosed diabetes mellitus

Michael L. Ho, Nadine Lawrence, Carl van Walraven, Doug Manuel, Erin Keely, Janine Malcolm, Robert D. Reid, Alan J. Forster

Journal:

Journal of Evaluation in Clinical Practice

Year:

2012

Language:

english

File:

PDF, 112 KB

english, 2012

35

A meta-analysis of hospital 30-day avoidable readmission rates

Carl van Walraven, Alison Jennings, Alan J. Forster

Journal:

Journal of Evaluation in Clinical Practice

Year:

2012

Language:

english

File:

PDF, 523 KB

english, 2012

36

Addition of time-dependent covariates to a survival model significantly improved predictions for daily risk of hospital death

Jenna Wong, Monica Taljaard, Alan J. Forster, Gabriel J. Escobar, Carl van Walraven

Journal:

Journal of Evaluation in Clinical Practice

Year:

2012

Language:

english

File:

PDF, 173 KB

english, 2012

37

Combining ratings from multiple physician reviewers helped to overcome the uncertainty associated with adverse event classification

Alan J. Forster, Keith O'Rourke, Kaveh G. Shojania, Carl van Walraven

Journal:

Journal of Clinical Epidemiology

Year:

2007

Language:

english

File:

PDF, 394 KB

english, 2007

38

Changes in surrogate outcomes can be translated into clinical outcomes using a Monte Carlo model

Carl van Walraven, Natalie Oake, Doug Coyle, Monica Taljaard, Alan J. Forster

Journal:

Journal of Clinical Epidemiology

Year:

2009

Language:

english

File:

PDF, 279 KB

english, 2009

39

The Kaiser Permanente inpatient risk adjustment methodology was valid in an external patient population

Carl van Walraven, Gabriel J. Escobar, John D. Greene, Alan J. Forster

Journal:

Journal of Clinical Epidemiology

Year:

2010

Language:

english

File:

PDF, 392 KB

english, 2010

40

Correlation between serial tests made disease probability estimates erroneous

Carl van Walraven, Peter C. Austin, Alison Jennings, Alan J. Forster

Journal:

Journal of Clinical Epidemiology

Year:

2009

Language:

english

File:

PDF, 445 KB

english, 2009

41

Individual patient meta-analysis—rewards and challenges

Carl van Walraven

Journal:

Journal of Clinical Epidemiology

Year:

2010

Language:

english

File:

PDF, 77 KB

english, 2010

42

The usefulness of administrative databases for identifying disease cohorts is increased with a multivariate model

Carl van Walraven, Peter C. Austin, Douglas Manuel, Greg Knoll, Allison Jennings, Alan J. Forster

Journal:

Journal of Clinical Epidemiology

Year:

2010

Language:

english

File:

PDF, 587 KB

english, 2010

43

A prospective cohort study found that provider and information continuity was low after patient discharge from hospital

Carl van Walraven, Monica Taljaard, Chaim M. Bell, Edward Etchells, Ian G. Stiell, Kelly Zarnke, Alan J. Forster

Journal:

Journal of Clinical Epidemiology

Year:

2010

Language:

english

File:

PDF, 950 KB

english, 2010

44

Administrative database research infrequently used validated diagnostic or procedural codes

Carl van Walraven, Carol Bennett, Alan J. Forster

Journal:

Journal of Clinical Epidemiology

Year:

2011

Language:

english

File:

PDF, 139 KB

english, 2011

45

Administrative database research has unique characteristics that can risk biased results

Carl van Walraven, Peter Austin

Journal:

Journal of Clinical Epidemiology

Year:

2012

Language:

english

File:

PDF, 108 KB

english, 2012

46

Response to Letter to the Editor on administrative database research infrequently uses validated diagnostic or procedural codes

Carl van Walraven

Journal:

Journal of Clinical Epidemiology

Year:

2012

Language:

english

File:

PDF, 59 KB

english, 2012

47

The influence of incidental abdominal aortic aneurysm monitoring on patient outcomes

Carl van Walraven, Jenna Wong, Kareem Morant, Alison Jennings, Peter C. Austin, Prasad Jetty, Alan J. Forster

Journal:

Journal of Vascular Surgery

Year:

2011

Language:

english

File:

PDF, 903 KB

english, 2011

48

The effect of hospitalization on oral anticoagulation control: A population-based study

Carl van Walraven, Peter C. Austin, Natalie Oake, Philip Wells, Muhammad Mamdani, Alan J. Forster

Journal:

Thrombosis Research

Year:

2007

Language:

english

File:

PDF, 1.17 MB

english, 2007

49

Renin-angiotensin system blockade and the risk of hyperkalemia in chronic hemodialysis patients

Greg A Knoll, Arjun Sahgal, Rama C Nair, Janet Graham, Carl van Walraven, Kevin D Burns

Journal:

The American Journal of Medicine

Year:

2002

Language:

english

File:

PDF, 60 KB

english, 2002

50

Effect of follow-up physician visits on emergency readmissions

Carl van Walraven, Alan Forster

Journal:

The American Journal of Medicine

Year:

2002

Language:

english

File:

PDF, 40 KB

english, 2002