Dr Benjamin Ewald

Senior Lecturer

School of Medicine and Public Health (Public Health)

Career Summary

Biography

Dr Ben Ewald completed his undergraduate training at the University of Newcastle in 1982, the then Family Medicine program training in 1992 and a masters in epidemiology in 1996. He worked as a GP  in Sydney, then for 10 years in Alice Springs. While at Congress, the Aboriginal medical service in Alice he saw for the first time a community health centre that could identify its community, and had a realistic involvement in their public health issues as well as the provision of sick care. In the Central Australian context with such a high disease burden it was glaringly obvious that access to primary care, and basing that care on effective treatments were areas that could benefit from applied epidemiology.

General practice research interests have included a study of the economics of ambulatory blood pressure monitoring, and the diagnostic accuracy of B Natriuretic Peptide for heart failure. He has also taken part in community wide physical activity research and from 2011 is running an RCT in physical activity promotion. He has a role in public health advocacy on  issues of environments to promote physical activity, and interpreting scholarship on environmental risks to health.

Now a GP in Newcastle, he teaches in the epidemiology masters program at the Centre for Clinical Epidemiology and Biostatistics at the University of Newcastle and co ordinates the communicable disease epidemiology and research protocol design subjects as well as teaching in the undergraduate medical course.

Current research directions include development of new analytic methods for data from accelerometers for use in physical activity research, bringing objective measurement of physical activity into clinical practice settings, and analysis of health system data to make cycling safer.

 Ben Ewald

Research Expertise
Diagnostic test research in the general practice setting. Ambulatory blood pressure monitoring B type natriuretic peptides Diagnostic test meta analysis Clinical epidemiologic methodology. Physical activity and ageing.

Teaching Expertise
Postgraduate epidemiology and research design. Communicable disease epidemiology.


Qualifications

  • PhD (Community Medicine & Clinical Epidemiology), University of Newcastle
  • Bachelor of Medicine, University of Newcastle
  • Master of Medical Science (Epidemiology), University of Newcastle

Keywords

  • Environmental health
  • General Practice
  • Meta analysis
  • Physical Activity
  • Public Health
  • communicable Disease
  • diagnostic test research
  • epidemiology

Fields of Research

CodeDescriptionPercentage
010499Statistics not elsewhere classified20
110899Medical Microbiology not elsewhere classified15
110399Clinical Sciences not elsewhere classified65

Professional Experience

UON Appointment

DatesTitleOrganisation / Department
1/01/2015 - 31/12/2015Senior LecturerUniversity of Newcastle
School of Medicine and Public Health
Australia
10/10/2002 - 31/12/2002LecturerUniversity of Newcastle
School of Medicine and Public Health
Australia
1/01/2002 - 31/12/2002LecturerUniversity of Newcastle
School of Medicine and Public Health
Australia
8/01/1999 - 31/12/1999Lecturer - Comm Med & Clin EpidemUniversity of Newcastle
School of Population Health Sciences
Australia

Professional appointment

DatesTitleOrganisation / Department
1/01/1998 - General PractitionerPrivate Practice
Australia
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Publications

For publications that are currently unpublished or in-press, details are shown in italics.


Chapter (1 outputs)

YearCitationAltmetricsLink
2011Ewald BD, 'B-type natriuretic peptide: A new diagnostic tool for congestive heart failure', Abnormal Laboratory Results, McGraw Hill, North Ryde, NSW 142-146 (2011) [B2]

Journal article (31 outputs)

YearCitationAltmetricsLink
2014Ewald B, Attia J, McElduff P, 'How many steps are enough? dose-response curves for pedometer steps and multiple health markers in a community-based sample of older Australians', Journal of Physical Activity and Health, 11 509-518 (2014) [C1]

Background: Although an overall public health target of 10,000 steps per day has been advocated, the dose-response relationship for each health benefit of physical activity may differ. Methods: A representative community sample of 2458 Australian residents aged 55-85 wore a pedometer for a week in 2005-2007 and completed a health assessment. Age-standardized steps per day were compared with multiple markers of health using locally weighted regression to produce smoothed dose-response curves and then to select the steps per day matching 60% or 80% of the range in each health marker. Results: There is a linear relationship between activity level and markers of inflammation throughout the range of steps per day; this is also true for BMI in women and high density lipoprotein in men. For other markers, including waist:hip ratio, fasting glucose, depression, and SF-36 scores, the benefit of physical activity is mostly in the lower half of the distribution. Conclusions: Older adults have no plateau in the curve for some health outcomes, even beyond 12,000 steps per day. For other markers, however, there is a threshold effect, indicating that most of the benefit is achieved by 8000 steps per day, supporting this as a suitable public health target for older adults. © 2014 Human Kinetics, Inc.

DOI10.1123/jpah.2012-0091
CitationsScopus - 2Web of Science - 3
Co-authorsJohn Attia
2014Agho KE, Hall J, Ewald B, 'Determinants of the Knowledge of and Attitude towards Tuberculosis in Nigeria', JOURNAL OF HEALTH POPULATION AND NUTRITION, 32 520-538 (2014) [C1]
Author URL
Co-authorsJohn Hall
2014James EL, Ewald B, Johnson N, Brown W, Stacey FG, Mcelduff P, et al., 'Efficacy of GP referral of insufficiently active patients for expert physical activity counseling: protocol for a pragmatic randomized trial (The NewCOACH trial)', BMC FAMILY PRACTICE, 15 (2014) [C3]
DOI10.1186/s12875-014-0218-1Author URL
Co-authorsNatalie Johnson, Erica James, Angela Booth, Ron Plotnikoff
2013Magin P, Holliday S, Dunlop A, Ewald B, Dunbabin J, Henry J, et al., 'Discomfort sharing the general practice waiting room with mentally ill patients: a cross-sectional study', FAMILY PRACTICE, 30 190-196 (2013) [C1]
DOI10.1093/fampra/cms058Author URL
Co-authorsParker Magin
2012Holliday SM, Magin PJ, Dunbabin JS, Ewald BD, Henry J-M, Goode SM, et al., 'Waiting room ambience and provision of opioid substitution therapy in general practice', Medical Journal of Australia, 196 391-394 (2012) [C1]
CitationsScopus - 5Web of Science - 4
Co-authorsParker Magin
2012Wilson AJ, Robertson J, Ewald BD, Henry D, 'What the public learns about screening and diagnostic tests through the media', Medical Journal of Australia, 197 324-326 (2012) [C2]
CitationsScopus - 2Web of Science - 2
Co-authorsAmanda Wilson
2011Ramsay EN, Roughead EE, Ewald BD, Pratt NL, Ryan P, 'A self-controlled case series to assess the effectiveness of beta blockers for heart failure in reducing hospitalisations in the elderly', BMC Medical Research Methodology, 11 1-7 (2011) [C1]
DOI10.1186/1471-2288-11-106
CitationsScopus - 2Web of Science - 2
2011Tudor-Locke C, Craig CL, Aoyagi Y, Bell RC, Croteau KA, De Bourdeaudhuij I, et al., 'How many steps/day are enough? For older adults and special populations', International Journal of Behavioral Nutrition & Physical Activity, 8 80 (2011) [C1]
CitationsScopus - 86Web of Science - 86
2010Johnson NA, Inder KJ, Ewald BD, James EL, Bowe SJ, 'Association between participation in outpatient cardiac rehabilitation and self-reported receipt of lifestyle advice from a healthcare provider: Results of a population based cross-sectional survey', Rehabilitation Research and Practice, Article 541741 (2010) [C1]
DOI10.1155/2010/541741
Co-authorsNatalie Johnson, Erica James, Kerry Inder
2010McEvoy MA, Smith WT, D'Este CA, Duke JM, Peel R, Schofield PW, et al., 'Cohort Profile: The Hunter Community Study', International Journal of Epidemiology, 39 1452-1463 (2010) [C1]
DOI10.1093/ije/dyp343
CitationsScopus - 51Web of Science - 51
Co-authorsWayne Smith, Julie Byles, John Attia, Roseanne Peel, Rodney Scott, Mddah01, Peter Schofield, Derek Smith, Catherine Deste
2010Ewald BD, McEvoy MA, Attia JR, 'Pedometer counts superior to physical activity scale for identifying health markers in older adults', British Journal of Sports Medicine, 44 756-761 (2010) [C1]
DOI10.1136/bjsm.2008.048827
CitationsScopus - 11Web of Science - 9
Co-authorsJohn Attia
2010Schulzke SM, Pillow J, Ewald BD, Patole SK, 'Flow-cycled versus time-cycled synchronized ventilation for neonates', Cochrane Database of Systematic Reviews, CD008246 (2010) [C1]
DOI10.1002/14651858.CD008246.pub2
CitationsScopus - 2Web of Science - 2
2009Ewald DP, Eisman JA, Ewald BD, Winzenberg TM, Seibel MJ, Ebeling PR, et al., 'Population rates of bone densitometry use in Australia, 2001-2005, by sex and rural versus urban location', Medical Journal of Australia, 190 126-128 (2009) [C1]
CitationsScopus - 15Web of Science - 15
2009Gow RM, Ewald BD, Lai L, Gardin L, Lougheed J, 'The Measurement of the QT and QTc on the neonatal and infant electrocardiogram: A comprehensive reliability assessment', Annals of Noninvasive Electrocardiology, 14 165-175 (2009) [C1]
DOI10.1111/j.1542-474x.2009.00292.x
CitationsScopus - 6Web of Science - 4
2009Ewald BD, Duke JM, Thakkinstian A, Attia JR, Smith WT, 'Physical activity of older Australians measured by pedometry', Australasian Journal on Ageing, 28 127-133 (2009) [C1]
DOI10.1111/j.1741-6612.2009.00372.x
CitationsScopus - 14Web of Science - 11
Co-authorsJohn Attia, Wayne Smith
2008Ewald BD, Webb CE, Durrheim DN, Russell RC, 'Is there a risk of malaria transmission in NSW?', NSW Public Health Bulletin, 19 127-131 (2008) [C1]
DOI10.1071/nb07040
CitationsScopus - 1
Co-authorsDavid Durrheim
2008Ewald BD, Durrheim DN, 'Australian Bat Lyssavirus: Examination of post-exposure treatment in NSW', NSW Public Health Bulletin, 19 104-107 (2008) [C1]
DOI10.1071/nb07050
CitationsScopus - 4
Co-authorsDavid Durrheim
2008Ewald BD, Ewald D, Thakkinstian A, Attia JR, 'Meta-analysis of B type natriuretic peptide and N-terminal pro B natriuretic peptide in the diagnosis of clinical heart failure and population screening for left ventricular systolic dysfunction', Internal Medicine Journal, 38 101-113 (2008) [C1]
DOI10.1111/j.1445-5994.2007.01454.x
CitationsScopus - 49Web of Science - 41
Co-authorsJohn Attia
2008Ewald BD, 'Method of cut point selection biases diagnostic research', Internal Medicine Journal, 38 615 (2008) [C3]
DOI10.1111/j.1445-5994.2008.01684.x
2007Wylks CE, Ewald BD, Guest C, 'The epidemiology of pertussis in the Australian Capital Territory, 1999 to 2005: Epidemics of testing, disease or false positives?', Communicable Diseases Intelligence, 31 383-391 (2007) [C1]
2007Ewald B, 'Post hoc choice of cut points introduced bias to diagnostic research (vol 59, pg 798, 2006)', JOURNAL OF CLINICAL EPIDEMIOLOGY, 60 756-756 (2007)
DOI10.1016/j.jclinepi.2007.05.005Author URL
2007Ewald BD, 'Erratum for 'Post hoc choice of cut points introduced bias to diagnostic research'', Journal of Clinical Epidemiology, 60 756 (2007) [C3]
DOI10.1016/j.jclinepi.2005.11.025
CitationsWeb of Science - 26
2006Ewald BD, 'Post hoc choice of cut points introduced bias to diagnostic research', Journal of Clinical Epidemiology, 59 798-801 (2006) [C1]
DOI10.1016/j.jclinepi.2005.11.025
2006Le TA, Sohn AH, Nguyen PT, Vo TC, Tran Nguyen TH, Ewald BD, Dibley MJ, 'Microbiology of surgical site infections and associated antimicrobial use among Vietnamese orthopedic and neurosurgical patients', Infection Control and Hospital Epidemiology, 27 855-862 (2006) [C1]
DOI10.1086/506400
CitationsWeb of Science - 4
2005Thu LTA, Dibley MJ, Ewald BD, Tien NP, Lam LD, 'Incidence of surgical site infections and accompanying risk factors in Vietnamese orthopaedic patients', Journal of Hospital Infection, 60 360-367 (2005) [C1]
DOI10.1016/j.jhin.2005.02.006
CitationsScopus - 16Web of Science - 9
2004Attia JR, Nair BR, Sibbritt DW, Ewald BD, Paget NS, Wellard RF, et al., 'Generating pre-test probabilities: a neglected area in clinical decision making', Medical Journal of Australia, 180 449-454 (2004) [C1]
CitationsScopus - 27Web of Science - 17
Co-authorsJohn Attia
2004Ewald BD, Attia JR, 'Which test to detect microalbuminuria in diabetic patients?', Australian Family Physician, 33 565-568 (2004) [C1]
CitationsScopus - 14
Co-authorsJohn Attia
2003Ewald BD, 'B-type natriuretic peptide: a new diagnostic tool for congestive heart failure', Australian Prescriber, 26 64-65 (2003) [C2]
2002Ewald BD, Pekarsky B, 'PBS/RPBS cost implications of trends and guideline recommendations in the pharmacological management of hypertension', MEDICAL JOURNAL OF AUSTRALIA, 176 189-190 (2002)
Author URL
CitationsScopus - 1
2002Ewald BD, Pekarsky B, 'Cost analysis of ambulatory blood pressure monitoring in initiating antihypertensive drug treatment in Australian general practice', Medical Journal of Australia, 176 580-583 (2002) [C1]
CitationsWeb of Science - 15
2002McElduff P, Attia JR, Ewald BD, Cockburn JD, Heller R, 'Estimating the contribution of individual risk factors to disease in a person with more than one risk factor', The Journal of Clinical Epidemiology, 55 588-592 (2002) [C1]
CitationsScopus - 14Web of Science - 12
Co-authorsJohn Attia
Show 28 more journal articles

Conference (11 outputs)

YearCitationAltmetricsLink
2012Ewald BD, McElduff P, Attia JR, 'How many steps are enough? Dose response curves for objectively measured physical activity in an Australian community based sample', Journal of Science and Medicine in Sport, Sydney, Australia (2012) [E3]
Co-authorsJohn Attia
2012James EL, Ewald BD, Johnson NA, Brown W, Stacey FG, Plotnikoff RC, 'Efficacy of referral for physical activity counseling: Protocol for an RCT to compare face-to-face and telephone counselling', Journal of Science and Medicine in Sport, Sydney, Australia (2012) [E3]
Co-authorsNatalie Johnson, Erica James, Ron Plotnikoff
2011Dunbabin JS, Holliday SM, Magin PJ, Dunlop AJ, Ewald BD, Goode SM, Henry J, 'Discomfort with mental illness in general practice waiting rooms: A cross-sectional study', 2011 PHC Research Conference Abstracts, Brisbane, QLD (2011) [E3]
Co-authorsParker Magin
2011Ramsay E, Pratt NL, Roughead E, Ryan P, Ewald B, 'A Self-Controlled Case Series To Assess the Effectiveness of Beta Blockers for Heart Failure in Reducing Hospitalisations in the Elderly', PHARMACOEPIDEMIOLOGY AND DRUG SAFETY (2011) [E3]
Author URL
2010Holliday SM, Dunlop AJ, Magin PJ, Goode SM, Henry J, Dunbabin JS, Ewald BD, 'Does GP care of drug & alcohol patients cause distress to other patients? A cross-sectional waiting room study', 2010 Primary Health Care Research Conference: Program & Abstracts, Darwin, NT (2010) [E3]
Co-authorsParker Magin
2010Holliday SM, Dunlop AJ, Magin PJ, Goode SM, Henry J, Dunbabin JS, Ewald BD, 'Patient experiences of GP waiting rooms: A cross-sectional study', GP10. Abstracts, Cairns, QLD (2010) [E3]
Co-authorsParker Magin
2010Holliday S, Magin P, Dunlop A, Ewald B, Henry J, Goode S, Dunbabin J, 'DOES PRESCRIBING OPIATE SUBSTITUTION THERAPY DISTRESS A GENERAL PRACTITIONER'S OTHER PATIENTS? A CROSS-SECTIONAL WAITING ROOM STUDY', DRUG AND ALCOHOL REVIEW (2010) [E3]
Author URL
Co-authorsParker Magin
2009Ewald DP, Eisman J, Ewald B, Winzenberg TM, Seibel MJ, Ebeling PR, et al., 'Bone densitometry Medicare claims suggest inadequate testing for Australian men and rural men and women', BONE, Sydney, AUSTRALIA (2009) [E3]
DOI10.1016/j.bone.2009.01.205Author URL
2009Holliday SM, Dunlop AJ, Magin PJ, Ewald BD, Henry J, Goode SM, Dunbabin JS, 'The waiting room ambience in general practice (WRAP) study: Patients attitudes to aspects of their experience in GPs' waiting rooms', Drug and Alcohol Review, Darwin, NT (2009) [E3]
DOI10.1111/j.1465-3362.2009.00123.x
Co-authorsParker Magin
2009Ewald BD, 'Interpretation of step counts in population research', Journal of Science and Medicine in Sport, Brisbane, QLD (2009) [E3]
2009Ewald BD, James EL, Johnson NA, Paras LE, 'Efficacy of exercise physiologist counselling in primary care patients: A pilot study to determine feasibility and acceptability', Journal of Science and Medicine in Sport, Brisbane, QLD (2009) [E3]
Co-authorsNatalie Johnson, Erica James
Show 8 more conferences
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Grants and Funding

Summary

Number of grants7
Total funding$1,347,992

Click on a grant title below to expand the full details for that specific grant.


20112 grants / $1,218,300

Efficacy of exercise physiologist counselling in primary care patients: a RCT of two pragmatic approaches$896,589

Funding body: NHMRC (National Health & Medical Research Council)

Funding bodyNHMRC (National Health & Medical Research Council)
Project TeamAssociate Professor Erica James, Doctor Benjamin Ewald, Doctor Natalie Johnson, Professor Ronald Plotnikoff
SchemeProject Grant
RoleInvestigator
Funding Start2011
Funding Finish2011
GNoG0190295
Type Of FundingAust Competitive - Commonwealth
Category1CS
UONY

Physical Activity and Nutrition: The University of Newcastle's Approach Toward Better Population Health and Education$321,711

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamProfessor Ronald Plotnikoff, Professor Robin Callister, Professor Clare Collins, Doctor Benjamin Ewald, Professor Manohar Garg, Associate Professor Erica James, Professor David Lubans, Professor Philip Morgan
SchemePriority Research Centre
RoleInvestigator
Funding Start2011
Funding Finish2011
GNoG1100058
Type Of FundingInternal
CategoryINTE
UONY

20091 grants / $1,258

Be Active 09. Seventh national physical activity conference, Brisbane, 14-17 October 2009$1,258

Funding body: University of Newcastle - Faculty of Health and Medicine

Funding bodyUniversity of Newcastle - Faculty of Health and Medicine
Project TeamDoctor Benjamin Ewald
SchemeTravel Grant
RoleLead
Funding Start2009
Funding Finish2009
GNoG0190438
Type Of FundingInternal
CategoryINTE
UONY

20082 grants / $34,712

GPs and Vitamin D deficiency: A survey of knowledge, attitudes and practices$24,615

Funding body: Cancer Council NSW

Funding bodyCancer Council NSW
Project TeamAssociate Professor Billie Bonevski, Conjoint Professor Afaf Girgis, Doctor Benjamin Ewald, Conjoint Professor Bruce Armstrong
SchemeResearch Grant
RoleInvestigator
Funding Start2008
Funding Finish2008
GNoG0189349
Type Of FundingDonation - Aust Non Government
Category3AFD
UONY

Pilot project to test recruitment and intervention for physical activity promotion RCT in general practice$10,097

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamDoctor Benjamin Ewald
SchemeEarly Career Researcher Grant
RoleLead
Funding Start2008
Funding Finish2008
GNoG0189265
Type Of FundingInternal
CategoryINTE
UONY

20041 grants / $73,722

Accuracy of a new blood test for B Naturietic Peptide in the diagnosis of congestive heart failure in general practice$73,722

Funding body: NHMRC (National Health & Medical Research Council)

Funding bodyNHMRC (National Health & Medical Research Council)
Project TeamDoctor Benjamin Ewald
SchemeScholarships - Public Health Postgraduate Research
RoleLead
Funding Start2004
Funding Finish2004
GNoG0183994
Type Of FundingAust Competitive - Commonwealth
Category1CS
UONY

20021 grants / $20,000

Accuracy of a new blood test for B Natriuretic Peptide in the diagnosis of congestive heart failure in General practice patients.$20,000

Funding body: Hunter Medical Research Institute

Funding bodyHunter Medical Research Institute
Project TeamDoctor Benjamin Ewald, Conjoint Associate Professor Julia Lowe
SchemeResearch Grant
RoleLead
Funding Start2002
Funding Finish2002
GNoG0181187
Type Of FundingContract - Aust Non Government
Category3AFC
UONY
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Research Supervision

Past Supervision

YearResearch Title / Program / Supervisor Type
2005Prospective Surveillance of Surgical Site Infections at a Tertiary Hospital in Viet Nam and the Impact of a Bedside Hand Sanitizer Program
Public Health, Faculty of Health and Medicine
Co-Supervisor
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Dr Benjamin Ewald

Position

Senior Lecturer
Centre for Clinical Epidemiology & Biostatistics
School of Medicine and Public Health
Faculty of Health and Medicine

Focus area

Public Health

Contact Details

Emailben.ewald@newcastle.edu.au
Phone(02) 4042 0544
Fax(02)

Office

RoomHMRI level 4
BuildingHMRI Building
LocationOther

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