Karen Walker
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Previous Organizations / Institutes
The organizations / institutes from the scholar's other articles in the past ten years
Research Subjects
Karen Walker has a total of 86 co-authors. Here are the top co-authors by number of shared publications:
- Andrew John Anderson Holland
The Children's Hospital at Westmead Burns Unit, Kids Research Institute, Department of Paediatrics and Child Health, Sydney Medical School, The University of Sydney, New South Wales, Australia
6 shared publications Nadia Badawi
Grace Centre for Newborn Care, The Children's Hospital at Westmead, Sydney, New South Wales, Australia
5 shared publications- Nadia Badawi
Cerebral Palsy Alliance, Sydney Medical School The University of Sydney Camperdown New South Wales Australia
5 shared publications Robert Halliday
Grace Centre for Newborn Care, The Children's Hospital at Westmead, Sydney, New South Wales, Australia
5 shared publications- Claire Galea
Macquarie University
3 shared publications - Fiona A. Quirke
Health Research Board Neonatal Encephalopathy PhD Training Network (NEPTuNE), Dublin, Ireland
3 shared publications
Latest Publications
- 5 January 2026
- Published by Springer Nature in Journal of Perinatology
- p. 1-5
Skin InteGrity in extreme preterms research NETwork (SIGNET) - improving skin care for the most immature infants
Increased survival of preterm infants born <28 weeks’ gestation brings new challenges for healthcare teams and families, particularly in the absence of high-quality, population-specific evidence to guide optimal skin care. Skin integrity is critical for preventing infection, reducing pain, and minimizing fluid loss. However, variations in care, delivery models, geographic settings, and clinician expertise continue to influence outcomes—impacting both immediate survival, long-term morbidity and mortality. This review outlines the key challenges associated with delivering safe and effective skin care for extremely preterm infants; identifies priority areas for research and benchmarking, and proposes a collaborative approach to address these gaps. The Skin InteGrity in extreme preterms research NETwork (SIGNET) collaborative seeks to align outcome measures, generate essential physiological data, promote knowledge exchange, and develop practical, evidence-based tools to support consistent, high-quality care for these uniquely vulnerable patients.
- 5 January 2026
- Published by Springer Nature in Journal of Perinatology
- p. 1-5
Skin InteGrity in extreme preterms research NETwork (SIGNET) - improving skin care for the most immature infants
Increased survival of preterm infants born <28 weeks’ gestation brings new challenges for healthcare teams and families, particularly in the absence of high-quality, population-specific evidence to guide optimal skin care. Skin integrity is critical for preventing infection, reducing pain, and minimizing fluid loss. However, variations in care, delivery models, geographic settings, and clinician expertise continue to influence outcomes—impacting both immediate survival, long-term morbidity and mortality. This review outlines the key challenges associated with delivering safe and effective skin care for extremely preterm infants; identifies priority areas for research and benchmarking, and proposes a collaborative approach to address these gaps. The Skin InteGrity in extreme preterms research NETwork (SIGNET) collaborative seeks to align outcome measures, generate essential physiological data, promote knowledge exchange, and develop practical, evidence-based tools to support consistent, high-quality care for these uniquely vulnerable patients.
- Open Access
- 30 July 2025
- Published by MDPI AG in Nursing Reports
- Vol. 15 (8) , 276
How Do We Keep Our New Graduate Nurses in Australia?
This paper aims to discuss the transition of new graduate nurses into the workforce, the preparation provided to equip them through the novice–beginner stage, and the theory–practice conundrum. Background: In Australia, new graduate transition programs have been in existence since the 1990s. While there is widespread acknowledgment that this period is pivotal for new graduate nurses entering the profession, there is a lack of consensus on the definition of best practice to achieve optimal preparation for new graduate nurses transitioning into the workforce. Methods: This discussion paper integrates the nursing literature on this topic with the extensive professional experiences of the authors, who are currently working as clinicians in metropolitan hospitals and hold academic positions at universities. Their insights are informed by the literature sourced from peer-reviewed English language journals, including reviews, empirical studies, and national and international reports. Discussion: Recruiting and retaining nurses presents a multifaceted challenge that requires the development of effective tools and strategies to build a sustainable workforce. Both the literature and the authors’ experiences highlight several key factors influencing the preparedness of new graduates. These factors include workplace culture, the demands placed on new graduates, and the support, education, and training they receive. The perspectives shared in this article offer valuable discussion points that can deepen our understanding of the current issues and contribute to the development of more effective solutions.
- 30 July 2025
- Published by MDPI AG in Nursing Reports
- Vol. 15 (8) , 276
Open AccessHow Do We Keep Our New Graduate Nurses in Australia?
This paper aims to discuss the transition of new graduate nurses into the workforce, the preparation provided to equip them through the novice–beginner stage, and the theory–practice conundrum. Background: In Australia, new graduate transition programs have been in existence since the 1990s. While there is widespread acknowledgment that this period is pivotal for new graduate nurses entering the profession, there is a lack of consensus on the definition of best practice to achieve optimal preparation for new graduate nurses transitioning into the workforce. Methods: This discussion paper integrates the nursing literature on this topic with the extensive professional experiences of the authors, who are currently working as clinicians in metropolitan hospitals and hold academic positions at universities. Their insights are informed by the literature sourced from peer-reviewed English language journals, including reviews, empirical studies, and national and international reports. Discussion: Recruiting and retaining nurses presents a multifaceted challenge that requires the development of effective tools and strategies to build a sustainable workforce. Both the literature and the authors’ experiences highlight several key factors influencing the preparedness of new graduates. These factors include workplace culture, the demands placed on new graduates, and the support, education, and training they receive. The perspectives shared in this article offer valuable discussion points that can deepen our understanding of the current issues and contribute to the development of more effective solutions.
- Open Access
- 25 September 2024
- Published by BMJ in BMJ Paediatrics Open
- Vol. 8 (1) , e002510
Neonatal encephalopathy: a systematic review of reported treatment outcomes
Background Neonatal encephalopathy (NE) is a multi-organ condition potentially leading to death or long-term neurodisability. Therapeutic hypothermia is the standard treatment for NE; however, long-term impairments remain common. Studies of new treatments for NE often measure and report different outcomes. Core outcome sets (COSs), a minimum set of outcomes to be measured and reported in all studies for a condition, address this problem. This paper aimed to identify outcomes reported (primary, secondary, adverse events and other reported outcomes) in (1) randomised trials and (2) systematic reviews of randomised trials of interventions for the treatment of NE in the process of developing a COS for interventions for the treatment of NE. Methods We completed a systematic search for outcomes used to evaluate treatments for NE using MEDLINE, Embase, Cochrane CENTRAL, the Cochrane Database of Systematic Reviews and the WHO International Clinical Trials Registry Platform. Two reviewers screened all included articles independently. Outcomes were extracted verbatim, similar outcomes were grouped and outcome domains were developed. Results 386 outcomes were reported in 116 papers, from 85 studies. Outcomes were categorised into 18 domains. No outcome was reported by all studies, a single study reported 11 outcomes and it was not explicitly stated that outcomes had input from parents. Discussion Heterogeneity in reported outcomes means that synthesis of studies evaluating new treatments for NE remains difficult. A COS, that includes parental/family input, is needed to ensure consistency in measuring and reporting outcomes, and to enable comparison of randomised trials.
- 25 September 2024
- Published by BMJ in BMJ Paediatrics Open
- Vol. 8 (1) , e002510
Open AccessNeonatal encephalopathy: a systematic review of reported treatment outcomes
Background Neonatal encephalopathy (NE) is a multi-organ condition potentially leading to death or long-term neurodisability. Therapeutic hypothermia is the standard treatment for NE; however, long-term impairments remain common. Studies of new treatments for NE often measure and report different outcomes. Core outcome sets (COSs), a minimum set of outcomes to be measured and reported in all studies for a condition, address this problem. This paper aimed to identify outcomes reported (primary, secondary, adverse events and other reported outcomes) in (1) randomised trials and (2) systematic reviews of randomised trials of interventions for the treatment of NE in the process of developing a COS for interventions for the treatment of NE. Methods We completed a systematic search for outcomes used to evaluate treatments for NE using MEDLINE, Embase, Cochrane CENTRAL, the Cochrane Database of Systematic Reviews and the WHO International Clinical Trials Registry Platform. Two reviewers screened all included articles independently. Outcomes were extracted verbatim, similar outcomes were grouped and outcome domains were developed. Results 386 outcomes were reported in 116 papers, from 85 studies. Outcomes were categorised into 18 domains. No outcome was reported by all studies, a single study reported 11 outcomes and it was not explicitly stated that outcomes had input from parents. Discussion Heterogeneity in reported outcomes means that synthesis of studies evaluating new treatments for NE remains difficult. A COS, that includes parental/family input, is needed to ensure consistency in measuring and reporting outcomes, and to enable comparison of randomised trials.
- 13 November 2023
- Published by Elsevier in Journal of Obstetric, Gynecologic, & Neonatal Nursing
- Vol. 52 (6) , e1-e4
Breaking the Cycle of Nursing Chaos: The Need to Address the Nursing Shortage
- 13 November 2023
- Published by Elsevier in Journal of Obstetric, Gynecologic, & Neonatal Nursing
- Vol. 52 (6) , e1-e4
Breaking the Cycle of Nursing Chaos: The Need to Address the Nursing Shortage
- Open Access
- 25 July 2022
- Published by BMJ in BMJ Paediatrics Open
- Vol. 6 (1) , e001550
Core outcomes in neonatal encephalopathy: a qualitative study with parents
Objective To identify the outcomes considered important to parents or caregivers of infants diagnosed with neonatal encephalopathy, hypoxic ischaemic encephalopathy or birth asphyxia in high-income and low- to middle-income countries (LMiCs), as part of the outcome-identification process in developing a core outcome set (COS) for the treatment of neonatal encephalopathy. Design A qualitative study involving 25 semistructured interviews with parents or other family members (caregivers) of infants who were diagnosed with, and treated for, neonatal encephalopathy, hypoxic ischaemic encephalopathy or birth asphyxia. Setting Interviews were conducted in high-income countries (HiCs) (n=11) by Zoom video conferencing software and in LMiCs (n=14) by phone or face to face. Findings Parents identified 54 outcomes overall, which mapped to 16 outcome domains. The domains identified were neurological outcomes, respiratory outcomes, gastrointestinal outcomes, cardiovascular outcomes, motor development, cognitive development, development (psychosocial), development (special senses), cognitive development, development (speech and social), other organ outcomes, survival/living outcomes, long-term disability, hospitalisation, parent-reported outcomes and adverse events. Conclusions This study provides insight into the outcomes that parents of infants diagnosed with neonatal encephalopathy have identified as the most important, to be considered in the process of developing a COS for the treatment of neonatal encephalopathy. We also provide description of the processes employed to ensure the inclusion of participants from LMiCs as well as HiCs.
- 25 July 2022
- Published by BMJ in BMJ Paediatrics Open
- Vol. 6 (1) , e001550
Open AccessCore outcomes in neonatal encephalopathy: a qualitative study with parents
Objective To identify the outcomes considered important to parents or caregivers of infants diagnosed with neonatal encephalopathy, hypoxic ischaemic encephalopathy or birth asphyxia in high-income and low- to middle-income countries (LMiCs), as part of the outcome-identification process in developing a core outcome set (COS) for the treatment of neonatal encephalopathy. Design A qualitative study involving 25 semistructured interviews with parents or other family members (caregivers) of infants who were diagnosed with, and treated for, neonatal encephalopathy, hypoxic ischaemic encephalopathy or birth asphyxia. Setting Interviews were conducted in high-income countries (HiCs) (n=11) by Zoom video conferencing software and in LMiCs (n=14) by phone or face to face. Findings Parents identified 54 outcomes overall, which mapped to 16 outcome domains. The domains identified were neurological outcomes, respiratory outcomes, gastrointestinal outcomes, cardiovascular outcomes, motor development, cognitive development, development (psychosocial), development (special senses), cognitive development, development (speech and social), other organ outcomes, survival/living outcomes, long-term disability, hospitalisation, parent-reported outcomes and adverse events. Conclusions This study provides insight into the outcomes that parents of infants diagnosed with neonatal encephalopathy have identified as the most important, to be considered in the process of developing a COS for the treatment of neonatal encephalopathy. We also provide description of the processes employed to ensure the inclusion of participants from LMiCs as well as HiCs.
- Open Access
- 8 February 2021
- Published by Springer Nature in Trials
- Vol. 22 (1) , 1-11
COHESION: core outcomes in neonatal encephalopathy (protocol)
Background: Neonatal encephalopathy is a complex syndrome in infants that predominantly affects the brain and other organs. The leading cause is a lack of oxygen in the blood reaching the brain. Neonatal encephalopathy can result in mortality or complications later in life, including seizures, movement disorders and cerebral palsy. Treatment options for neonatal encephalopathy are limited mainly to therapeutic hypothermia, although other potential treatments are emerging. However, evaluations of the effectiveness of treatments are challenging because of heterogeneity and inconsistency in outcomes measured and reported between trials. In this paper, we detail how we will develop a core outcome set to standardise outcomes measured and reported upon for interventions for the treatment of neonatal encephalopathy. Methods: We will systematically review the literature to identify outcomes reported previously in randomised trials and systematic reviews of randomised trials. We will identify outcomes important to parents or caregivers of infants diagnosed with and who have received treatment for neonatal encephalopathy. We will do this by conducting in person or by video teleconferencing interviews with parents or caregivers in high-income and low- to middle-income countries. Stakeholders with expertise in neonatal encephalopathy (parents/caregivers, healthcare providers and researchers) will rate the importance of identified outcomes in an online Delphi survey using either a three-round Delphi survey or a “Real-Time” Delphi survey to which stakeholders will be allocated at random. Consensus meetings will take place by video conference to allow for an international group of stakeholder representatives to discuss and vote on the outcomes to include in the final core outcome set (COS). Discussion: More research is needed on treatments for neonatal encephalopathy. Standardising outcomes measured and reported in evaluations of the effectiveness of interventions for the treatment of neonatal encephalopathy will improve evidence synthesis and improve results reported in systematic reviews and meta-analysis in this area. Overall, this COS will allow for improved treatments to be identified, heterogeneity in research to be reduced, and overall patient care to be enhanced. Trial registration: This study is registered in the Core Outcome Measures for Effectiveness (COMET) database http://www.comet-initiative.org/Studies/Details/1270.
- 8 February 2021
- Published by Springer Nature in Trials
- Vol. 22 (1) , 1-11
Open AccessCOHESION: core outcomes in neonatal encephalopathy (protocol)
Background: Neonatal encephalopathy is a complex syndrome in infants that predominantly affects the brain and other organs. The leading cause is a lack of oxygen in the blood reaching the brain. Neonatal encephalopathy can result in mortality or complications later in life, including seizures, movement disorders and cerebral palsy. Treatment options for neonatal encephalopathy are limited mainly to therapeutic hypothermia, although other potential treatments are emerging. However, evaluations of the effectiveness of treatments are challenging because of heterogeneity and inconsistency in outcomes measured and reported between trials. In this paper, we detail how we will develop a core outcome set to standardise outcomes measured and reported upon for interventions for the treatment of neonatal encephalopathy. Methods: We will systematically review the literature to identify outcomes reported previously in randomised trials and systematic reviews of randomised trials. We will identify outcomes important to parents or caregivers of infants diagnosed with and who have received treatment for neonatal encephalopathy. We will do this by conducting in person or by video teleconferencing interviews with parents or caregivers in high-income and low- to middle-income countries. Stakeholders with expertise in neonatal encephalopathy (parents/caregivers, healthcare providers and researchers) will rate the importance of identified outcomes in an online Delphi survey using either a three-round Delphi survey or a “Real-Time” Delphi survey to which stakeholders will be allocated at random. Consensus meetings will take place by video conference to allow for an international group of stakeholder representatives to discuss and vote on the outcomes to include in the final core outcome set (COS). Discussion: More research is needed on treatments for neonatal encephalopathy. Standardising outcomes measured and reported in evaluations of the effectiveness of interventions for the treatment of neonatal encephalopathy will improve evidence synthesis and improve results reported in systematic reviews and meta-analysis in this area. Overall, this COS will allow for improved treatments to be identified, heterogeneity in research to be reduced, and overall patient care to be enhanced. Trial registration: This study is registered in the Core Outcome Measures for Effectiveness (COMET) database http://www.comet-initiative.org/Studies/Details/1270.
- 2 July 2018
- Published by BMJ in Archives of Disease in Childhood - Fetal and Neonatal Edition
- Vol. 104 (1) , F2-F3
Physical growth, neurodevelopment and cognition outcomes in children with abdominal wall defects: a tale with two endings?
The criteria for success have changed as survival for infants undergoing most major surgery for congenital anomalies has become ‘routine’, even in infants at younger gestations. With the current expectation of survival, the critical lens of assessment has now moved onto quality of life. Yet infants who undergo neonatal surgery for congenital anomalies are still known to be at risk of poor growth1 and neurodevelopmental delay: a recent meta-analysis that included 23 studies found that cognition and motor delay was identified in 23% of children.2 The neurodevelopmental outcomes of infants requiring surgery for abdominal wall defects (AWD) continue to be a focus for researchers, with differing outcomes reported in the literature.3–5 Studies assessing children in young infancy, such as Gupta et al ,3 who reported the neurodevelopmental outcome at 1 year of age of 16 infants with gastroschisis (GS), found only neurodevelopmental delay in the language subsets in infants who were small for gestational age. Also reporting neurodevelopmental outcomes at 1 year of age, Minutillo et al 4 found a mean general quotient on the Griffiths developmental assessment of 99 (SD 9.8) in 88 infants with GS, a low incidence of developmental delay. At 2 years of age, Danzer and colleagues5 assessed 31 infants with a giant omphalocele, reporting a high incidence of neurological impairments in more than 50% of their cohort. More recent studies in later childhood are also not so reassuring, with working memory difficulties identified in a study by Harris et al 6 who assessed 39 children with GS at a mean age of 10 years. …
- 2 July 2018
- Published by BMJ in Archives of Disease in Childhood - Fetal and Neonatal Edition
- Vol. 104 (1) , F2-F3
Physical growth, neurodevelopment and cognition outcomes in children with abdominal wall defects: a tale with two endings?
The criteria for success have changed as survival for infants undergoing most major surgery for congenital anomalies has become ‘routine’, even in infants at younger gestations. With the current expectation of survival, the critical lens of assessment has now moved onto quality of life. Yet infants who undergo neonatal surgery for congenital anomalies are still known to be at risk of poor growth1 and neurodevelopmental delay: a recent meta-analysis that included 23 studies found that cognition and motor delay was identified in 23% of children.2 The neurodevelopmental outcomes of infants requiring surgery for abdominal wall defects (AWD) continue to be a focus for researchers, with differing outcomes reported in the literature.3–5 Studies assessing children in young infancy, such as Gupta et al ,3 who reported the neurodevelopmental outcome at 1 year of age of 16 infants with gastroschisis (GS), found only neurodevelopmental delay in the language subsets in infants who were small for gestational age. Also reporting neurodevelopmental outcomes at 1 year of age, Minutillo et al 4 found a mean general quotient on the Griffiths developmental assessment of 99 (SD 9.8) in 88 infants with GS, a low incidence of developmental delay. At 2 years of age, Danzer and colleagues5 assessed 31 infants with a giant omphalocele, reporting a high incidence of neurological impairments in more than 50% of their cohort. More recent studies in later childhood are also not so reassuring, with working memory difficulties identified in a study by Harris et al 6 who assessed 39 children with GS at a mean age of 10 years. …
- Open Access
- 11 June 2018
- Published by Springer Nature in BMC Pregnancy and Childbirth
- Vol. 18 (1) , 222
Complexity of gastroschisis predicts outcome: epidemiology and experience in an Australian tertiary centre
Gastroschisis is a congenital anomaly of the fetal abdominal wall, usually to the right side of umbilical insertion. It is often detected by routine antenatal ultrasound. Significant maternal and pediatric resources are utilised in the care of women and infants with gastroschisis. Increasing rates of gastroschisis worldwide have led institutions to review local data and investigate outcomes. A collaborative project was developed to review local epidemiology and investigate antenatal and neonatal factors influencing hospital length of stay (LOS) and total parental nutrition (TPN) in infants born with gastroschisis. We performed a five-year review of infants born with gastroschisis (2011–2015) at a major Australian centre. Complex gastroschisis was defined as involvement of stenosis, atresia, ischemia, volvulus or perforation and closed or vanishing gastroschisis. We extracted data from files and databases at the two participating hospitals, a major maternal fetal medicine centre and the affiliated children’s hospital. There were 56 infants antenatally diagnosed with gastroschisis with no terminations, one stillbirth (2%) and one infant with ‘vanishing’ gastroschisis. The mean maternal age was 23.9 years (range, 15–39 years). The mean gestation at delivery was 36 weeks (range, 25–39+ 3 weeks). Of the 55 neonates who received surgical management, 62% had primary closure. The median LOS was 33 (IQR, 23–45) days and the median duration of TPN was 26 (IQR, 17–36) days. Longer days on TPN (median 35 vs 16 days, P = 0.03) was associated with antenatal finding of multiple dilated bowel loops. Postnatal diagnosis of complex gastroschisis was made in 16% of cases and was associated with both longer LOS (median 89 vs 30 days, P = 0.003) and days on TPN (median 46 vs 21 days, P = 0.009). Complex gastroschisis was associated with greater days on TPN and LOS. We found no late-gestation stillbirths and a low overall rate of 1.8%, suggesting the risk for stillbirth associated with gastroschisis is lower than previously documented. This information may assist counselling families. Improved data collection worldwide may reveal causative factors and enable antenatal outcome predictors.
- 11 June 2018
- Published by Springer Nature in BMC Pregnancy and Childbirth
- Vol. 18 (1) , 222
Open AccessComplexity of gastroschisis predicts outcome: epidemiology and experience in an Australian tertiary centre
Gastroschisis is a congenital anomaly of the fetal abdominal wall, usually to the right side of umbilical insertion. It is often detected by routine antenatal ultrasound. Significant maternal and pediatric resources are utilised in the care of women and infants with gastroschisis. Increasing rates of gastroschisis worldwide have led institutions to review local data and investigate outcomes. A collaborative project was developed to review local epidemiology and investigate antenatal and neonatal factors influencing hospital length of stay (LOS) and total parental nutrition (TPN) in infants born with gastroschisis. We performed a five-year review of infants born with gastroschisis (2011–2015) at a major Australian centre. Complex gastroschisis was defined as involvement of stenosis, atresia, ischemia, volvulus or perforation and closed or vanishing gastroschisis. We extracted data from files and databases at the two participating hospitals, a major maternal fetal medicine centre and the affiliated children’s hospital. There were 56 infants antenatally diagnosed with gastroschisis with no terminations, one stillbirth (2%) and one infant with ‘vanishing’ gastroschisis. The mean maternal age was 23.9 years (range, 15–39 years). The mean gestation at delivery was 36 weeks (range, 25–39+ 3 weeks). Of the 55 neonates who received surgical management, 62% had primary closure. The median LOS was 33 (IQR, 23–45) days and the median duration of TPN was 26 (IQR, 17–36) days. Longer days on TPN (median 35 vs 16 days, P = 0.03) was associated with antenatal finding of multiple dilated bowel loops. Postnatal diagnosis of complex gastroschisis was made in 16% of cases and was associated with both longer LOS (median 89 vs 30 days, P = 0.003) and days on TPN (median 46 vs 21 days, P = 0.009). Complex gastroschisis was associated with greater days on TPN and LOS. We found no late-gestation stillbirths and a low overall rate of 1.8%, suggesting the risk for stillbirth associated with gastroschisis is lower than previously documented. This information may assist counselling families. Improved data collection worldwide may reveal causative factors and enable antenatal outcome predictors.
- 1 February 2018
- Published by Elsevier in Early Human Development
- Vol. 117, 57-61
Prediction of three year outcomes using the Bayley-III for surgical, cardiac and healthy Australian infants at one year of age
- 1 February 2018
- Published by Elsevier in Early Human Development
- Vol. 117, 57-61
Prediction of three year outcomes using the Bayley-III for surgical, cardiac and healthy Australian infants at one year of age
- 1 August 2017
- Published by Elsevier in Early Human Development
- Vol. 111, 42-48
General movement trajectories and neurodevelopment at 3 months of age following neonatal surgery
- 1 August 2017
- Published by Elsevier in Early Human Development
- Vol. 111, 42-48
General movement trajectories and neurodevelopment at 3 months of age following neonatal surgery