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Felgate H, Quinn C, Richardson B, Hudson C, Sethi D, Oddie S, Clarke P, Webber MA. Impact of daily octenidine skin washing versus nonwashing on antiseptic tolerance of coagulase-negative staphylococci in two neonatal intensive care units with different skin cleansing practices. Infect Prev Pract 2024; 6:100344. [PMID: 38371886 PMCID: PMC10874753 DOI: 10.1016/j.infpip.2024.100344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Accepted: 01/25/2024] [Indexed: 02/20/2024] Open
Abstract
Background There is wide variation in practices regarding routine bathing/washing of babies in neonatal intensive care units (NICUs). Evidence is lacking as to the benefit of routine antiseptic washes for reducing infection. We aimed to compare the antiseptic tolerance of Coagulase Negative Staphylococci (CoNS) within two UK NICUs with very different approaches to skin washing. Methods We compared antiseptic susceptibility of CoNS isolated from skin swabs of neonates admitted to the Norfolk and Norwich University Hospital (NNUH) NICU in December 2017-March 2018 with those isolated in the Bradford Royal Infirmary (BRI) NICU in January-March 2020. The NNUH does not practise routine whole-body washing whereas BRI practises daily whole-body washing from post-menstrual age 27 weeks using Octenisan wash lotion (0.3% octenidine; 1 minute contact time before washing off with sterile water). A total of 78 CoNS isolates from BRI and 863 from the NNUH were tested for susceptibility against the antiseptics octenidine (OCT) and chlorhexidine (CHX). Results Isolates from the BRI with practice of routine washing did not show increased antiseptic tolerance to OCT or CHX. Isolates from the NNUH which does not practise routine whole-body washing and rarely uses octenidine, were comparatively less susceptible to both CHX and OCT antiseptics. Conclusions Daily whole-body skin washing with OCT does not appear to select for CoNS isolates that are antiseptic tolerant towards OCT and CHX. There remains considerable uncertainty about the impact of different antiseptic regimes on neonatal skin microbiota, the benefit of routine washing, and the development of antiseptic tolerance in the NICU.
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Affiliation(s)
- Heather Felgate
- Quadram Institute Bioscience (QIB), Norwich Research Park, Norwich, UK
- Norwich Medical School, University of East Anglia (UEA), Norwich, UK
| | - Charlotte Quinn
- Norwich Medical School, University of East Anglia (UEA), Norwich, UK
- Neonatal Unit, Norfolk and Norwich University Hospitals NHS Foundation Trust, Norwich, UK
| | | | - Carol Hudson
- Neonatal Unit, Bradford Royal Infirmary, Bradford, UK
| | - Dheeraj Sethi
- Quadram Institute Bioscience (QIB), Norwich Research Park, Norwich, UK
- Norwich Medical School, University of East Anglia (UEA), Norwich, UK
- Neonatal Unit, Norfolk and Norwich University Hospitals NHS Foundation Trust, Norwich, UK
| | - Sam Oddie
- Neonatal Unit, Bradford Royal Infirmary, Bradford, UK
| | - Paul Clarke
- Norwich Medical School, University of East Anglia (UEA), Norwich, UK
- Neonatal Unit, Norfolk and Norwich University Hospitals NHS Foundation Trust, Norwich, UK
| | - Mark A. Webber
- Quadram Institute Bioscience (QIB), Norwich Research Park, Norwich, UK
- Norwich Medical School, University of East Anglia (UEA), Norwich, UK
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Clarke P, Soe A, Nichols A, Harizaj H, Webber MA, Linsell L, Bell JL, Tremlett C, Muthukumar P, Pattnayak S, Partlett C, King A, Juszczak E, Heath PT. 2% chlorhexidine gluconate aqueous versus 2% chlorhexidine gluconate in 70% isopropyl alcohol for skin disinfection prior to percutaneous central venous catheterisation: the ARCTIC randomised controlled feasibility trial. Arch Dis Child Fetal Neonatal Ed 2024; 109:202-210. [PMID: 37907266 PMCID: PMC10894828 DOI: 10.1136/archdischild-2023-325871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 09/08/2023] [Indexed: 11/02/2023]
Abstract
OBJECTIVE Catheter-related sepsis (CRS) is a major complication with significant morbidity and mortality. Evidence is lacking regarding the most appropriate antiseptic for skin disinfection before percutaneous central venous catheter (PCVC) insertion in preterm neonates. To inform the feasibility and design of a definitive randomised controlled trial (RCT) of two antiseptic formulations, we conducted the Antiseptic Randomised Controlled Trial for Insertion of Catheters (ARCTIC) feasibility study to assess catheter colonisation, sepsis, and skin morbidity. DESIGN Feasibility RCT. SETTING Two UK tertiary-level neonatal intensive care units. PATIENTS Preterm infants born <34 weeks' gestation scheduled to undergo PCVC insertion. INTERVENTIONS Skin disinfection with either 2% chlorhexidine gluconate (CHG)-aqueous or 2% CHG-70% isopropyl alcohol (IPA) before PCVC insertion and at removal. PRIMARY OUTCOME Proportion in the 2% CHG-70% IPA arm with a colonised catheter at removal. MAIN FEASIBILITY OUTCOMES Rates of: (1) CRS, catheter-associated sepsis (CAS), and CRS/CAS per 1,000 PCVC days; (2) recruitment and retention; (3) data completeness. SAFETY OUTCOMES Daily skin morbidity scores recorded from catheter insertion until 48 hours post-removal. RESULTS 116 babies were randomised. Primary outcome incidence was 4.1% (95% confidence interval: 0.9% to 11.5%). Overall catheter colonisation rate was 5.2% (5/97); CRS 2.3/1000 catheter days; CAS 14.8/1000 catheter days. Recruitment, retention and data completeness were good. No major antiseptic-related skin injury was reported. CONCLUSIONS A definitive comparative efficacy trial is feasible, but the very low catheter colonisation rate would make a large-scale RCT challenging due to the very large sample size required. ARCTIC provides preliminary reassurance supporting potential safe use of 2% CHG-70% IPA and 2% CHG-aqueous in preterm neonates. TRIAL REGISTRATION NUMBER ISRCTN82571474.
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Affiliation(s)
- Paul Clarke
- Neonatal Intensive Care Unit, Norfolk and Norwich University Hospitals NHS Foundation Trust, Norwich, Norfolk, UK
- Norwich Medical School, University of East Anglia, Norwich, Norfolk, UK
| | - Aung Soe
- Neonatal Intensive Care Unit, Medway Maritime Hospital, Gillingham, Kent, UK
| | - Amy Nichols
- Neonatal Intensive Care Unit, Norfolk and Norwich University Hospitals NHS Foundation Trust, Norwich, Norfolk, UK
| | - Helen Harizaj
- Neonatal Intensive Care Unit, Medway Maritime Hospital, Gillingham, Kent, UK
| | - Mark A Webber
- Norwich Medical School, University of East Anglia, Norwich, Norfolk, UK
- Quadram Institute Bioscience, Norwich, Norfolk, UK
| | - Louise Linsell
- National Perinatal Epidemiology Unit, Nuffield Department of Population Health, University of Oxford, Oxford, UK
| | - Jennifer L Bell
- National Perinatal Epidemiology Unit, Nuffield Department of Population Health, University of Oxford, Oxford, UK
| | - Catherine Tremlett
- Department of Microbiology, Norfolk and Norwich University Hospitals NHS Foundation Trust, Norwich, Norfolk, UK
| | - Priyadarsini Muthukumar
- Neonatal Intensive Care Unit, Norfolk and Norwich University Hospitals NHS Foundation Trust, Norwich, Norfolk, UK
| | - Santosh Pattnayak
- Neonatal Intensive Care Unit, Medway Maritime Hospital, Gillingham, Kent, UK
| | - Christopher Partlett
- National Perinatal Epidemiology Unit, Nuffield Department of Population Health, University of Oxford, Oxford, UK
| | - Andrew King
- National Perinatal Epidemiology Unit, Nuffield Department of Population Health, University of Oxford, Oxford, UK
| | - Ed Juszczak
- National Perinatal Epidemiology Unit, Nuffield Department of Population Health, University of Oxford, Oxford, UK
| | - Paul T Heath
- Centre for Neonatal and Paediatric Infection, Infection and Immunity, Saint George's University of London, London, UK
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Agathos E, Kantyka C, Clarke P. State of skin antiseptic choices in UK neonatal intensive care units in 2023. Arch Dis Child Fetal Neonatal Ed 2024:fetalneonatal-2024-326858. [PMID: 38350708 DOI: 10.1136/archdischild-2024-326858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/05/2024] [Indexed: 02/15/2024]
Affiliation(s)
- Elisabeth Agathos
- Neonatal Intensive Care Unit, Norfolk and Norwich University Hospitals NHS Foundation Trust, Norwich, UK
- Norwich Medical School, Faculty of Medicine and Health Sciences, University of East Anglia, Norwich, UK
| | - Carla Kantyka
- Neonatal Intensive Care Unit, Norfolk and Norwich University Hospitals NHS Foundation Trust, Norwich, UK
| | - Paul Clarke
- Neonatal Intensive Care Unit, Norfolk and Norwich University Hospitals NHS Foundation Trust, Norwich, UK
- Norwich Medical School, Faculty of Medicine and Health Sciences, University of East Anglia, Norwich, UK
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Zhang S, Zhu Y, Du Y, Yin X. The positioning of the catheter tip with an intracavitary electrocardiogram in epicutaneo-caval catheter placement via lower limbs in newborns: A retrospective study. J Vasc Access 2024; 25:119-124. [PMID: 35634963 DOI: 10.1177/11297298221100174] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
OBJECTIVE Few studies have been conducted on whether catheterisation via the lower limb pathway is suitable for intracavitary electrocardiogram (ECG) technology. This study explored the positioning of the epicutaneo-caval catheter (ECC) tip with intracavitary ECG via the lower limbs in newborns to determine its optimal placement and to improve the success rate of ECC placement using this method. METHODS Twenty-eight cases were selected for the observation group. The tip location with intracavitary ECG method was used to observe the changes in specific atrial depolarisation (P-wave) during the catheterisation process to determine whether the catheter tip was in the correct position. For comparative observation, chest X-rays and abdominal radiographs were taken within 24 h to determine sensitivity and specificity. The control group included 28 cases where the ECCs were inserted via the lower limbs, and chest X-rays and abdominal radiographs were taken within 24 h after the line was placed to confirm the correct positioning. RESULTS The success rate of the observation group was 91.30% (there were two cases of primary malposition), and the success rate of the control group was 78.57% (there were six cases of primary malposition). The success rate of the observation group was higher compared with the control group. CONCLUSION The tip location with intracavitary ECG method improved the success rate of ECC placement via the lower limbs in neonates. This method can effectively prevent the occurrence of lower limb primary catheter malposition and has significant clinical application value.
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Affiliation(s)
- Sha Zhang
- Department of Paediatrics, Shijiazhuang People's Hospital, Shijiazhuang, China
| | - Yuxin Zhu
- Department of Oncology, Shijiazhuang People's Hospital, Shijiazhuang, China
| | - Yuqiong Du
- Department of Paediatrics, Shijiazhuang People's Hospital, Shijiazhuang, China
| | - Xinxin Yin
- Department of Oncology, Shijiazhuang People's Hospital, Shijiazhuang, China
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Hitaka D, Fujiyama S, Nishihama Y, Ishii R, Hoshino Y, Hamada H, Miyazono Y, Nakayama SF, Takada H. Assessment of Alcohol Exposure From Alcohol-Based Disinfectants Among Premature Infants in Neonatal Incubators in Japan. JAMA Netw Open 2023; 6:e230691. [PMID: 36826814 PMCID: PMC9958524 DOI: 10.1001/jamanetworkopen.2023.0691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/25/2023] Open
Abstract
IMPORTANCE The risk of premature infants in neonatal incubators exposed to evaporated alcohol from alcohol-based disinfectants (ABDs) is unknown. OBJECTIVE To assess alcohol concentrations in the peripheral blood of premature infants and neonatal incubators. DESIGN, SETTING, AND PARTICIPANTS A quality improvement study comparing 2 different populations before and after introduction of ABD practice (ABD-PRAC) was conducted in a neonatal intensive care unit of a single tertiary hospital in Japan. Participants included premature infants who were born before 34 weeks of gestational age and received medical care in neonatal incubators. The study consisted of 3 periods: (1) September 1, 2020, to August 1, 2021 (prospective observation of pre-ABD-PRAC, (2) August 2 to August 22, 2021 (introduction of ABD-PRAC to medical staff and parents in the neonatal intensive care unit), and (3) August 23, 2021, to March 31, 2022 (prospective observation of post-ABD-PRAC). No follow-up studies were initiated. INTERVENTIONS An ABD-PRAC that aimed to reduce alcohol evaporation from ABDs inside neonatal incubators was instituted: (1) place alcohol preps in the incubator just before use and remove them from the incubator as soon as possible and (2) withhold placing hands into the incubators until 60 seconds after using ABDs for disinfection (applied only to family members). MAIN OUTCOMES AND MEASURES Blood alcohol concentration and evaporated alcohol concentrations in neonatal incubators. RESULTS Disinfectant practice was assessed among 28 infants during the pre-ABD-PRAC (17 infants [10 girls]; median gestational age at birth, 29.4 [IQR, 26.3-30.3] weeks) and post-ABD-PRAC (11 infants [3 girls]; median gestational age at birth, 30.0 [IQR, 25.3-32.2] weeks) study periods. The median blood alcohol concentration was 7.0 (IQR, 5.4-9.3) mg/dL pre-ABD-PRAC and 4.2 (IQR, 2.5-7.2) mg/dL post-ABD-PRAC. The median evaporated alcohol concentration inside neonatal incubators during pre-ABD-PRAC during the day was 23.6 (IQR, 15.9-36.5) ppm and, at night, was 13.2 (IQR, 8.9-19.4) ppm; during post-ABD-PRAC, the concentration was 9.4 (IQR, 6.0-16.0) ppm during the day and 5.7 (IQR, 3.6-9.7) ppm at night. The introduction of ABD-PRAC at 22 weeks' corrected gestational age was associated with a lower blood alcohol concentration in premature infants: regression coefficient value, -8.3 (95% CI, -12.0 to -4.7). CONCLUSIONS AND RELEVANCE In this study, alcohol evaporated from ABDs was absorbed by premature infants in neonatal incubators. The findings suggest that introduction of ABD-PRAC was associated with lower alcohol concentrations in neonatal incubators and in the blood of premature infants.
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Affiliation(s)
- Daisuke Hitaka
- Department of Pediatrics, University of Tsukuba Hospital, Tsukuba, Ibaraki, Japan
- Health and Environmental Risk Division, National Institute for Environmental Studies, Tsukuba, Ibaraki, Japan
| | - Satoshi Fujiyama
- Department of Pediatrics, University of Tsukuba Hospital, Tsukuba, Ibaraki, Japan
- Health and Environmental Risk Division, National Institute for Environmental Studies, Tsukuba, Ibaraki, Japan
| | - Yukiko Nishihama
- Health and Environmental Risk Division, National Institute for Environmental Studies, Tsukuba, Ibaraki, Japan
| | - Ryota Ishii
- Department of Biostatistics, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Yusuke Hoshino
- Department of Neonatology, Ibaraki Children's Hospital, Mito, Ibaraki, Japan
| | - Hiromi Hamada
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Yayoi Miyazono
- Department of Pediatrics, University of Tsukuba Hospital, Tsukuba, Ibaraki, Japan
- Department of Child Health, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Shoji F. Nakayama
- Health and Environmental Risk Division, National Institute for Environmental Studies, Tsukuba, Ibaraki, Japan
| | - Hidetoshi Takada
- Department of Pediatrics, University of Tsukuba Hospital, Tsukuba, Ibaraki, Japan
- Department of Child Health, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
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Bar-Meir M, Bendelac S, Shchors I. Chlorhexidine bathing in a tertiary care neonatal intensive care unit: A pilot study. PLoS One 2023; 18:e0283132. [PMID: 36952477 PMCID: PMC10035923 DOI: 10.1371/journal.pone.0283132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Accepted: 11/17/2022] [Indexed: 03/25/2023] Open
Abstract
BACKGROUND Concerns regarding potential risk of dermal irritation have led to the exclusion of NICU patients from the recommendation regarding the use of 2% chlorhexidine gluconate (CHG) wash for daily skin cleansing to reduce bloodstream infections. Our aim was to assess the safety of 2% CHG bathing in NICU patients. METHODS The regulator required a stepwise study enrollment to three successive groups: term infants, followed by near-term and pre-term infants. For comparison, we used a cohort of matched controls. A propensity score-adjusted regression model was used to compare the groups. INTERVENTION Infants were bathed thrice-weekly with 2% CHG-impregnated washcloths. Participant's skin was examined daily. RESULTS Over a total of 661 days of treatment: 384,129, and 148 days for the term, near-term and pre-term groups, respectively, no skin reactions were observed. The intervention group was generally sicker, however, bloodstream infections were similar between the groups. CONCLUSION For infants >30 weeks and >3 days old, 2% CHG bathing was safe. Large multicenter studies are urgently needed to establish the effectiveness of this practice in the NICU.
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Affiliation(s)
- Maskit Bar-Meir
- Pediatric Infectious Diseases, Shaare-Zedek Medical Center, Jerusalem, Israel
- The Faculty of Medicine, Hebrew University, Jerusalem, Israel
| | - Shoshana Bendelac
- Neonatal Intensive Care Unit, Shaare-Zedek Medical Center, Jerusalem, Israel
| | - Irina Shchors
- Neonatal Intensive Care Unit, Shaare-Zedek Medical Center, Jerusalem, Israel
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Chlorhexidine Gluconate Utilization for Infection Prevention in the NICU: A Survey of Current Practice. Adv Neonatal Care 2020; 20:38-47. [PMID: 31567183 DOI: 10.1097/anc.0000000000000658] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
BACKGROUND Central-line-associated bloodstream infection (CLABSI) contributes to significant morbidity and mortality in the neonatal intensive care unit (NICU). Disinfection of skin is part of bundled cares aimed at prevention of CLABSI. While considered an essential component of insertion and maintenance bundles, the optimal solution to disinfect neonatal skin remains controversial. PURPOSE The purpose of this project was to survey neonatal nurse practitioners and nursing leaders across NICUs regarding the current use of chlorhexidine gluconate (CHG) in term and preterm infants. METHODS This descriptive study involved the collection of survey data to determine NICU practices related to the use of CHG in their infant population. The sample was composed of nursing directors of NICUs and neonatal nurse practitioners who completed an electronic survey via a provided link. FINDINGS/RESULTS Chlorhexidine was reported to be used in 53 (82.81%) of the NICUs and was the primary agent used to prepare the skin for central vascular catheter insertion (53.23%) followed by povidone-iodine (45.16%), and 70% isopropyl alcohol (1.61%). Gestational age or birth weight restrictions for CHG use were reported in 43 (82.69%) NICUs. Trends in the data demonstrated nursing's role in using CHG in the NICU. Adverse events reported from CHG included burns, redness, dermatitis, and other irritations. Concerns included risk of absorption, burns, skin irritation, lack of evidence, and overall safety. IMPLICATIONS FOR PRACTICE Systematic monitoring by nurse leaders is needed to identify evidence related to skin disinfection and CHG in neonates. Targeted education for nursing staff related to directed to developmental maturation of the skin, safe use of CHG, review of best evidence, rationale for usage of CHG, and potential iatrogenic effects is recommended. IMPLICATIONS FOR RESEARCH Research is needed to evaluate the impact of educational offerings and surveillance for adverse events on CLABSI rates.
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Fraser C, Muller-Pebody B, Blackburn R, Gray J, Oddie SJ, Gilbert RE, Harron K. Linking surveillance and clinical data for evaluating trends in bloodstream infection rates in neonatal units in England. PLoS One 2019; 14:e0226040. [PMID: 31830076 PMCID: PMC6907823 DOI: 10.1371/journal.pone.0226040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Accepted: 11/19/2019] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE To evaluate variation in trends in bloodstream infection (BSI) rates in neonatal units (NNUs) in England according to the data sources and linkage methods used. METHODS We used deterministic and probabilistic methods to link clinical records from 112 NNUs in the National Neonatal Research Database (NNRD) to national laboratory infection surveillance data from Public Health England. We calculated the proportion of babies in NNRD (aged <1 year and admitted between 2010-2017) with a BSI caused by clearly pathogenic organisms between two days after admission and two days after discharge. We used Poisson regression to determine trends in the proportion of babies with BSI based on i) deterministic and probabilistic linkage of NNRD and surveillance data (primary measure), ii) deterministic linkage of NNRD-surveillance data, iii) NNRD records alone, and iv) linked NNRD-surveillance data augmented with clinical records of laboratory-confirmed BSI in NNRD. RESULTS Using deterministic and probabilistic linkage, 5,629 of 349,740 babies admitted to a NNU in NNRD linked with 6,660 BSI episodes accounting for 38% of 17,388 BSI records aged <1 year in surveillance data. The proportion of babies with BSI due to clearly pathogenic organisms during their NNU admission was 1.0% using deterministic plus probabilistic linkage (primary measure), compared to 1.0% using deterministic linkage alone, 0.6% using NNRD records alone, and 1.2% using linkage augmented with clinical records of BSI in NNRD. Equivalent proportions for babies born before 32 weeks of gestation were 5.0%, 4.8%, 2.9% and 5.9%. The proportion of babies who linked to a BSI decreased by 7.5% each year (95% confidence interval [CI]: -14.3%, -0.1%) using deterministic and probabilistic linkage but was stable using clinical records of BSI or deterministic linkage alone. CONCLUSION Linkage that combines BSI records from national laboratory surveillance and clinical NNU data sources, and use of probabilistic methods, substantially improved ascertainment of BSI and estimates of BSI trends over time, compared with single data sources.
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Affiliation(s)
- Caroline Fraser
- UCL Great Ormond Street Institute of Child Health, University College London, London, United Kingdom
- * E-mail:
| | | | - Ruth Blackburn
- Institute of Health Informatics, University College London, London, United Kingdom
| | - Jim Gray
- Microbiology, Birmingham Women’s & Children’s Hospitals, Birmingham, United Kingdom
| | - Sam J. Oddie
- Bradford Neonatology, Bradford Royal Infirmary, Bradford, United Kingdom
- Centre for Reviews and Dissemination, University of York, York, United Kingdom
| | - Ruth E. Gilbert
- UCL Great Ormond Street Institute of Child Health, University College London, London, United Kingdom
| | - Katie Harron
- UCL Great Ormond Street Institute of Child Health, University College London, London, United Kingdom
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