scholarly journals Impact of the first wave of the SARS-CoV-2 pandemic on the outcome of neurosurgical patients: a nationwide study in Spain

BMJ Open ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. e053983
Author(s):  
Igor Paredes ◽  
Ana Maria Castaño Leon ◽  
Alfonso Lagares ◽  
Luis Jimenez Roldan ◽  
Angel Perez-Nuñez ◽  
...  

ObjectiveTo assess the effect of the first wave of the SARS-CoV-2 pandemic on the outcome of neurosurgical patients in Spain.SettingsThe initial flood of COVID-19 patients overwhelmed an unprepared healthcare system. Different measures were taken to deal with this overburden. The effect of these measures on neurosurgical patients, as well as the effect of COVID-19 itself, has not been thoroughly studied.ParticipantsThis was a multicentre, nationwide, observational retrospective study of patients who underwent any neurosurgical operation from March to July 2020.InterventionsAn exploratory factorial analysis was performed to select the most relevant variables of the sample.Primary and secondary outcome measuresUnivariate and multivariate analyses were performed to identify independent predictors of mortality and postoperative SARS-CoV-2 infection.ResultsSixteen hospitals registered 1677 operated patients. The overall mortality was 6.4%, and 2.9% (44 patients) suffered a perioperative SARS-CoV-2 infection. Of those infections, 24 were diagnosed postoperatively. Age (OR 1.05), perioperative SARS-CoV-2 infection (OR 4.7), community COVID-19 incidence (cases/105 people/week) (OR 1.006), postoperative neurological worsening (OR 5.9), postoperative need for airway support (OR 5.38), ASA grade ≥3 (OR 2.5) and preoperative GCS 3–8 (OR 2.82) were independently associated with mortality. For SARS-CoV-2 postoperative infection, screening swab test <72 hours preoperatively (OR 0.76), community COVID-19 incidence (cases/105 people/week) (OR 1.011), preoperative cognitive impairment (OR 2.784), postoperative sepsis (OR 3.807) and an absence of postoperative complications (OR 0.188) were independently associated.ConclusionsPerioperative SARS-CoV-2 infection in neurosurgical patients was associated with an increase in mortality by almost fivefold. Community COVID-19 incidence (cases/105 people/week) was a statistically independent predictor of mortality.Trial registration numberCEIM 20/217.

2019 ◽  
Vol 8 (9) ◽  
pp. 1485 ◽  
Author(s):  
Ryo Takata ◽  
Hiroki Nishikawa ◽  
Hirayuki Enomoto ◽  
Kazunori Yoh ◽  
Yoshinori Iwata ◽  
...  

We sought to elucidate the relationship between albumin-bilirubin (ALBI) grade and non-protein respiratory quotient (npRQ) calculated by indirect calorimetry in chronic liver disease (CLD) patients (n = 601, median age = 63 years). Factors linked to npRQ < 0.85, which is reported to be an optimal cutoff point for the prognosis in liver cirrhosis (LC) patients, were also investigated using univariate and multivariate analyses. The median npRQ for all cases was 0.86. In total, 253 patients (42.1%) had npRQ < 0.85. The proportions of patients with npRQ < 0.85 in LC and non-LC patients were 51.9% (166/320) in LC patients and 31.0% (87/281) in non-LC patients (p < 0.0001). The median npRQ in ALBI grades 1, 2, and 3 for all cases were: 0.89, 0.85, and 0.82 (overall p < 0.0001). The proportions of patients with npRQ < 0.85 were 31.0% (71/229) in ALBI grade 1, 46.34% (152/328) in ALBI grade 2, and 68.18% (30/44) in ALBI grade 3 (overall p < 0.0001). In multivariate analyses of factors linked to npRQ < 0.85, ALBI grade 3 (p = 0.0095, hazard ratio = 3.242, ALBI grade 1 as a reference) was an independent predictor along with prothrombin time (p = 0.0139). In conclusion, ALBI grade can be a useful marker for npRQ in patients with CLDs.


Blood ◽  
2019 ◽  
Vol 134 (Supplement_1) ◽  
pp. 4522-4522
Author(s):  
Yu Akahoshi ◽  
Aiko Igarashi ◽  
Takahiro Fukuda ◽  
Naoyuki Uchida ◽  
Masatsugu Tanaka ◽  
...  

[Background] Previous studies have shown that a graft-versus-leukemia (GVL) effect was augmented in patients who developed graft-versus-host disease (GVHD). The benefit of the GVL effect is counter-balanced by treatment-related mortality (TRM) due to GVHD. In addition, the development of the ability to detect minimal residual disease (MRD) has changed the landscape of risk stratification. Therefore, patients with positive-MRD require a more intensive GVL effect to reduce relapse, whereas a "mild" GVL effect may be sufficient in patients with negative-MRD. However, it is uncertain whether the influence of a GVL effect would differ depending on the MRD status at HSCT. Here, we conducted a nationwide retrospective study to evaluate the impact of GVHD and a GVL effect according to the MRD status for Philadelphia chromosome-positive acute lymphoblastic leukemia (Ph-positive ALL) in the TKI era. [Patients & Methods] Clinical data were obtained from the Transplant Registry Unified Management Program (TRUMP), which is the registry database of the Japan Society for Hematopoietic Cell Transplantation (JSHCT). We examined 1022 recipients who underwent their first allogeneic hematopoietic stem cell transplantation (HSCT) for Ph-positive ALL in first complete remission between 2005 and 2017. We excluded patients who lacked MRD status at HSCT or who received in vivo T-cell depletion or high-dose post-transplantation cyclophosphamide. The impacts of acute GVHD (aGVHD) and chronic GVHD (cGVHD) as time-dependent covariates on transplant outcomes were analyzed while adjusting for other significant variables in multivariate analyses. In the analysis of cGVHD, only patients who survived at least 100 days without hematological relapse were included. This retrospective study was approved by the data management committee of TRUMP and by the Institutional Review Board of Jichi Medical University Saitama Medical Center. [Results] The median age at HSCT was 45 years (range, 16 to 71 years). MRD status at HSCT was negative in 791 (77.4%) and positive in 231 (22.6%). The median observation period of the survivors was 1505 days (range, 18 to 4944 days). To graphically illustrate the impacts of aGVHD and cGVHD, a Simon-Makuch plot were drawn in the whole cohort and in the groups limited to negative-MRD and positive-MRD at HSCT (Figure 1 and 2). The impacts of acute GVHD on overall survival, hematological relapse, and non-relapse mortality (NRM) were summarized in Table. In multivariate analyses, the HRs for hematological relapse with positive-MRD at HSCT (0.80 for grade 1-2 aGVHD and 0.31 for grade 3-4 aGVHD) were smaller than those with negative-MRD at HSCT (1.07 for grade 1-2 aGVHD and 0.45 for grade 3-4 aGVHD), respectively. In addition, the risk of hematological relapse gradually decreased proportionally to the severity of aGVHD. Because the risks of NRM for grade 1-2 aGVHD were not significant regardless of MRD-positivity, grade 1-2 aGVHD was not significantly associated with superior overall mortality. Grade 3-4 aGVHD was significantly associated with inferior overall survival in the whole cohort and in the group limited to negative-MRD at HSCT because of high NRM. Meanwhile, grade 3-4 aGVHD was not significantly associated with overall mortality due to the potent GVL effect in the analysis limited to positive-MRD at HSCT. In the analysis of cGVHD, although cGVHD reduced the risk of hematological relapse, the survival advantage of cGVHD was not significant regardless of MRD-positivity. Because the NIH severity score was not available in our database, further evaluations of cGVHD considering the severity score are needed. [Conclusion] Our study showed that both MRD status at HSCT and the severity of aGVHD might be associated with the intensity of a GVHD-associated GVL effect for Ph-positive ALL. However, because GVHD had no apparent survival benefit regardless of MRD-positivity at HSCT or the severity of GVHD, less intensive GVHD prophylaxis to obtain the GVL effect is not recommended for Ph-positive ALL. Disclosures Kanda: Nippon-Shinyaku: Research Funding; Kyowa-Hakko Kirin: Consultancy, Honoraria, Research Funding; MSD: Research Funding; Shionogi: Consultancy, Honoraria, Research Funding; Chugai: Consultancy, Honoraria, Research Funding; Takeda: Consultancy, Honoraria, Research Funding; Chugai: Consultancy, Honoraria, Research Funding; Alexion: Consultancy, Honoraria; Pfizer: Research Funding; Novartis: Research Funding; Dainippon Sumitomo: Consultancy, Honoraria, Research Funding; CSL Behring: Research Funding; Bristol-Myers Squibb: Consultancy, Honoraria; Pfizer: Research Funding; Tanabe Mitsubishi: Research Funding; Sanofi: Research Funding; Celgene: Consultancy, Research Funding; Taiho: Research Funding; Astellas: Consultancy, Honoraria, Research Funding; Bristol-Myers Squibb: Consultancy, Honoraria; Eisai: Consultancy, Honoraria, Research Funding; Otsuka: Research Funding; CSL Behring: Research Funding; Dainippon Sumitomo: Consultancy, Honoraria, Research Funding; Kyowa-Hakko Kirin: Consultancy, Honoraria, Research Funding; Sanofi: Research Funding; Taisho-Toyama: Research Funding; Asahi-Kasei: Research Funding; Taiho: Research Funding; Tanabe Mitsubishi: Research Funding; Takeda: Consultancy, Honoraria, Research Funding; Novartis: Research Funding; Celgene: Consultancy, Research Funding; Mochida: Consultancy, Honoraria; Astellas: Consultancy, Honoraria, Research Funding; Alexion: Consultancy, Honoraria; Eisai: Consultancy, Honoraria, Research Funding; Takara-bio: Consultancy, Honoraria; Otsuka: Research Funding; Asahi-Kasei: Research Funding; Mochida: Consultancy, Honoraria; Taisho-Toyama: Research Funding; Ono: Consultancy, Honoraria, Research Funding; MSD: Research Funding; Ono: Consultancy, Honoraria, Research Funding; Nippon-Shinyaku: Research Funding; Shionogi: Consultancy, Honoraria, Research Funding; Takara-bio: Consultancy, Honoraria. Ichinohe:Astellas Pharma: Research Funding; Chugai Pharmaceutical Co.: Research Funding; CSL Behring: Research Funding; Eisai Co.: Research Funding; Kyowa Hakko Kirin Co.: Research Funding; Ono Pharmaceutical Co.: Research Funding; Pfizer: Research Funding; Nippon Shinyaku Co.: Research Funding; MSD: Research Funding; Otsuka Pharmaceutical Co.: Research Funding; Repertoire Genesis Inc.: Research Funding; Sumitomo Dainippon Pharma Co.: Research Funding; Taiho Pharmaceutical Co.: Research Funding; Takeda Pharmaceutical Co.: Research Funding; Zenyaku Kogyo Co.: Research Funding; Alexion Pharmaceuticals: Honoraria; Bristol-Myers Squibb: Honoraria; Celgene: Honoraria; JCR Pharmaceuticals: Honoraria; Janssen Pharmaceutical K.K.: Honoraria; Mundipharma: Honoraria; Novartis: Honoraria. Tanaka:Bristol-Myers Squibb: Research Funding. Atsuta:CHUGAI PHARMACEUTICAL CO., LTD.: Honoraria; Kyowa Kirin Co., Ltd: Honoraria. Kako:Bristol-Myers Squibb: Honoraria; Pfizer Japan Inc.: Honoraria.


BMJ Open ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. e041458
Author(s):  
Vicki Anderson ◽  
Vanessa C Rausa ◽  
Nicholas Anderson ◽  
Georgia Parkin ◽  
Cathriona Clarke ◽  
...  

IntroductionWhile most children recover from a concussion shortly after injury, approximately 30% experience persistent postconcussive symptoms (pPCS) beyond 1-month postinjury. Existing research into the treatment of pPCS have evaluated unimodal approaches, despite evidence suggesting that pPCS likely represent an interaction across various symptom clusters. The primary aim of this study is to evaluate the effectiveness of a multimodal, symptom-tailored intervention to accelerate symptom recovery and increase the proportion of children with resolved symptoms at 3 months postconcussion.Methods and analysisIn this open-label, assessor-blinded, randomised clinical trial, children with concussion aged 8–18 years will be recruited from The Royal Children’s Hospital (The RCH) emergency department, or referred by a clinician, within 17 days of initial injury. Based on parent ratings of their child’s PCS at ~10 days postinjury, symptomatic children (≥2 symptoms at least 1-point above those endorsed preinjury) will undergo a baseline assessment at 3 weeks postinjury and randomised into either Concussion Essentials (CE, n=108), a multimodal, interdisciplinary delivered, symptom-tailored treatment involving physiotherapy, psychology and education, or usual care (UC, n=108) study arms. CE participants will receive 1 hour of intervention each week, for up to 8 weeks or until pPCS resolve. A postprogramme assessment will be conducted at 3 months postinjury for all participants. Effectiveness of the CE intervention will be determined by the proportion of participants for whom pPCS have resolved at the postprogramme assessment (primary outcome) relative to the UC group. Secondary outcome analyses will examine whether children receiving CE are more likely to demonstrate resolution of pPCS, earlier return to normal activity, higher quality of life and a lower rate of utilisation of health services, compared with the UC group.Ethics and disseminationEthics were approved by The RCH Human Research Ethics Committee (HREC: 37100). Parent, and for mature minors, participant consent, will be obtained prior to commencement of the trial. Study results will be disseminated at international conferences and international peer-reviewed journals.Trial registration numberACTRN12617000418370; pre-results.


2020 ◽  
Vol 10 (1) ◽  
pp. 39
Author(s):  
Antonin Trimaille ◽  
Jecko Thachil ◽  
Benjamin Marchandot ◽  
Anaïs Curtiaud ◽  
Ian Leonard-Lorant ◽  
...  

Background and Objective: Host defence mechanisms to counter virus infection include the activation of the broncho-alveolar haemostasis. Fibrin degradation products secondary to extravascular fibrin breakdown could contribute to the marked increase in D-Dimers during COVID-19. We sought to examine the prognostic value on lung injury of D-Dimers in non-critically ill COVID-19 patients without thrombotic events. Methods: This study retrospectively analysed hospitalized COVID-19 patients classified according to a D-Dimers threshold following the COVID-19 associated haemostatic abnormalities (CAHA) classification at baseline and at peak (Stage 1: D-Dimers less than three-fold above normal; Stage 2: D-Dimers three- to six-fold above normal; Stage 3: D-Dimers six-fold above normal). The primary endpoint was the occurrence of critical lung injuries on chest computed tomography. The secondary outcome was the composite of in-hospital death or transfer to the intensive care unit (ICU). Results: Among the 123 patients included, critical lung injuries were evidenced in 8 (11.9%) patients in Stage 1, 6 (20%) in Stage 2 and 15 (57.7%) in Stage 3 (p = 0.001). D-Dimers staging at peak was an independent predictor of critical lung injuries regardless of the inflammatory burden assessed by CRP levels (OR 2.70, 95% CI (1.50–4.86); p < 0.001) and was significantly associated with increased in-hospital death or ICU transfer (14.9 % in Stage 1, 50.0% in Stage 2 and 57.7% in Stage 3 (p < 0.001)). D-Dimers staging at peak was an independent predictor of in-hospital death or ICU transfer (OR 2.50, CI 95% (1.27–4.93); p = 0.008). Conclusions: In the absence of overt thrombotic events, D-Dimers quantification is a relevant marker of critical lung injuries and dismal patient outcome.


BMJ Open ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. e045343
Author(s):  
Ray Moynihan ◽  
Sharon Sanders ◽  
Zoe A Michaleff ◽  
Anna Mae Scott ◽  
Justin Clark ◽  
...  

ObjectivesTo determine the extent and nature of changes in utilisation of healthcare services during COVID-19 pandemic.DesignSystematic review.EligibilityEligible studies compared utilisation of services during COVID-19 pandemic to at least one comparable period in prior years. Services included visits, admissions, diagnostics and therapeutics. Studies were excluded if from single centres or studied only patients with COVID-19.Data sourcesPubMed, Embase, Cochrane COVID-19 Study Register and preprints were searched, without language restrictions, until 10 August, using detailed searches with key concepts including COVID-19, health services and impact.Data analysisRisk of bias was assessed by adapting the Risk of Bias in Non-randomised Studies of Interventions tool, and a Cochrane Effective Practice and Organization of Care tool. Results were analysed using descriptive statistics, graphical figures and narrative synthesis.Outcome measuresPrimary outcome was change in service utilisation between prepandemic and pandemic periods. Secondary outcome was the change in proportions of users of healthcare services with milder or more severe illness (eg, triage scores).Results3097 unique references were identified, and 81 studies across 20 countries included, reporting on >11 million services prepandemic and 6.9 million during pandemic. For the primary outcome, there were 143 estimates of changes, with a median 37% reduction in services overall (IQR −51% to −20%), comprising median reductions for visits of 42% (−53% to −32%), admissions 28% (−40% to −17%), diagnostics 31% (−53% to −24%) and for therapeutics 30% (−57% to −19%). Among 35 studies reporting secondary outcomes, there were 60 estimates, with 27 (45%) reporting larger reductions in utilisation among people with a milder spectrum of illness, and 33 (55%) reporting no difference.ConclusionsHealthcare utilisation decreased by about a third during the pandemic, with considerable variation, and with greater reductions among people with less severe illness. While addressing unmet need remains a priority, studies of health impacts of reductions may help health systems reduce unnecessary care in the postpandemic recovery.PROSPERO registration numberCRD42020203729.


BMJ Open ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. e047007
Author(s):  
Mari Terada ◽  
Hiroshi Ohtsu ◽  
Sho Saito ◽  
Kayoko Hayakawa ◽  
Shinya Tsuzuki ◽  
...  

ObjectivesTo investigate the risk factors contributing to severity on admission. Additionally, risk factors of worst severity and fatality were studied. Moreover, factors were compared based on three points: early severity, worst severity and fatality.DesignAn observational cohort study using data entered in a Japan nationwide COVID-19 inpatient registry, COVIREGI-JP.SettingAs of 28 September 2020, 10480 cases from 802 facilities have been registered. Participating facilities cover a wide range of hospitals where patients with COVID-19 are admitted in Japan.ParticipantsParticipants who had a positive test result on any applicable SARS-CoV-2 diagnostic tests were admitted to participating healthcare facilities. A total of 3829 cases were identified from 16 January to 31 May 2020, of which 3376 cases were included in this study.Primary and secondary outcome measuresPrimary outcome was severe or nonsevere on admission, determined by the requirement of mechanical ventilation or oxygen therapy, SpO2 or respiratory rate. Secondary outcome was the worst severity during hospitalisation, judged by the requirement of oxygen and/orinvasive mechanical ventilation/extracorporeal membrane oxygenation.ResultsRisk factors for severity on admission were older age, men, cardiovascular disease, chronic respiratory disease, diabetes, obesity and hypertension. Cerebrovascular disease, liver disease, renal disease or dialysis, solid tumour and hyperlipidaemia did not influence severity on admission; however, it influenced worst severity. Fatality rates for obesity, hypertension and hyperlipidaemia were relatively lower.ConclusionsThis study segregated the comorbidities influencing severity and death. It is possible that risk factors for severity on admission, worst severity and fatality are not consistent and may be propelled by different factors. Specifically, while hypertension, hyperlipidaemia and obesity had major effect on worst severity, their impact was mild on fatality in the Japanese population. Some studies contradict our results; therefore, detailed analyses, considering in-hospital treatments, are needed for validation.Trial registration numberUMIN000039873. https://upload.umin.ac.jp/cgi-open-bin/ctr_e/ctr_view.cgi?recptno=R000045453


Author(s):  
Alexander Younsi ◽  
Lennart Riemann ◽  
Cleo Habel ◽  
Jessica Fischer ◽  
Christopher Beynon ◽  
...  

AbstractIn an aging Western society, the incidence of chronic subdural hematomas (cSDH) is continuously increasing. In this study, we reviewed our clinical management of cSDH patients and identified predictive factors for the need of reoperation due to residual or recurrent hematomas with a focus on the use of antithrombotic drugs. In total, 623 patients who were treated for cSDH with surgical evacuation between 2006 and 2016 at our department were retrospectively analyzed. Clinical and radiological characteristics and laboratory parameters were investigated as possible predictors of reoperation with univariate and multivariate analyses. Additionally, clinical outcome measures were compared between patients on anticoagulants, on antiplatelets, and without antithrombotic medication. In univariate analyses, patients on anticoagulants and antiplatelets presented significantly more often with comorbidities, were significantly older, and their risk for perioperative complications was significantly increased. Nevertheless, their clinical outcome was comparable to that of patients without antithrombotics. In multivariate analysis, only the presence of comorbidities, but not antithrombotics, was an independent predictor for the need for reoperations. Patients on antithrombotics do not seem to necessarily have a significantly increased risk for residual hematomas or rebleeding requiring reoperation after cSDH evacuation. More precisely, the presence of predisposing comorbidities might be a key independent risk factor for reoperation. Importantly, the clinical outcomes after surgical evacuation of cSDH are comparable between patients on anticoagulants, antiplatelets, and without antithrombotics.


2017 ◽  
Vol 43 (4) ◽  
pp. 290-297 ◽  
Author(s):  
Anna Clementi ◽  
Alessandra Brocca ◽  
Grazia Maria Virzì ◽  
Massimo de Cal ◽  
Davide Giavarina ◽  
...  

Background/Aim: Cardiac surgery-associated acute kidney injury is an independent predictor of chronic renal disease and mortality. The scope of this study was to determine the utility of procalcitonin (PCT) and plasma interleukin-6 (IL-6) levels in predicting renal outcome and mortality in these patients. Methods: PCT and plasma IL-6 levels of 122 cardiac surgery patients were measured at 48 h after the surgical procedure. Primary endpoints were adverse renal outcome and mortality. Secondary endpoints were length of stay, bleeding, and number of transfusions. Results: PCT was found to be a better predictor of adverse renal outcome than IL-6. IL-6 seemed to be a better predictor of both 30-day and overall mortality than PCT. Neither PCT nor IL-6 levels were found to be good predictors of intensive care unit stay and bleeding. Conclusion: PCT may be considered a good predictor of adverse renal outcome in cardiac surgery patients, whereas IL-6 seems to possess a good predictive value for mortality in this population of patients.


Author(s):  
Nicholas Raison ◽  
Pol Servian ◽  
Amit Patel ◽  
Ainkaran Santhirasekaram ◽  
Andrew Smith ◽  
...  

Abstract Background Preoperative PSA, ISUP grade group (GG), prostate examination and multiparametric MRI (mpMRI) form the basis of prostate cancer staging. Unlike other solid organ tumours, tumour volume (TV) is not routinely used aside from crude estimates such as maximum cancer core length. The aim of this study is to assess the role of TV as a marker for oncological outcomes in high-risk non-metastatic prostate cancer. Methods A prospectively maintained database of patients undergoing minimally invasive (laparoscopic or robot-assisted laparoscopic) radical prostatectomy at a UK centre between 2007 and 2019 were analysed. A total of 251 patients with NCCN high or very high-risk prostate cancer were identified. Primary outcome measure was time to biochemical recurrence (BCR) and the secondary outcome was time to treatment failure (TTF). TV was measured on the pathological specimen using the stacking method. Multivariable cox regression analysis was used to identify factors predicting BCR and TFF. TV as a predictor of BCR and TFF was further analysed through time-dependent receiver operating characteristic (ROC) curves. Kaplan–Meier survival estimates were used to evaluate TV cut-off scores. Results Median follow up was 4.50 years. Four factors were associated with BCR and TFF on multivariable analysis (TV, pathological GG, pathological T stage, positive margin >3 mm). Area under the Curve (AUC) for TV as a predictor of BCR and TTF at 5 years was 0.71 and 0.75, respectively. Including all 4 variables in the model increased AUC to 0.84 and 0.85 for BCR and TFF. A 2.50 cm TV cut off demonstrated a significance difference in time to BCR, p < 0.001. Conclusions Pathological tumour volume is an independent predictor of oncological outcomes in high risk prostate cancer but does not add significant prognostic value when combined with established variables. However, the option of accurate TV measurement on mpMRI raises the possibility of using TV as useful marker for preoperative risk stratification.


BMJ Open ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. e023097 ◽  
Author(s):  
Amy R Mulick ◽  
Victoria Allen ◽  
Hywel C Williams ◽  
Douglas J C Grindlay ◽  
Neil Pearce ◽  
...  

IntroductionAtopic dermatitis is a complex disease with differing clinical presentations. Many attempts have been made to identify uniform subtypes, or phenotypes, of atopic dermatitis in order to identify different aetiologies, improve diagnosis, estimate more accurate clinical prognoses, inform treatment andmanagement or predict treatment efficacy andeffectiveness. However, no consensus yet exists on exactly what defines these phenotypes or how many there are and whether they are genuine or statistical artefacts. This review aims to identify previously reported phenotypes of atopic dermatitis, the features used to define them and any characteristics or clinical outcomes significantly associated with them.Methods and analysisWe will search Ovid Embase, Ovid MEDLINE and Web of Science from inception to the latest available date at the time of the search for studies attempting to classify atopic dermatitis in humans using any cross-sectional or longitudinal epidemiological or interventional design. Primary outcomes are atopic dermatitis phenotypes, features used to define them and characteristics associated with them in subsequent analyses. A secondary outcome is the methodological approach used to derive them. Two reviewers will independently screen titles and abstracts for inclusion, extract data and assess study quality. We will present the results of this review descriptively and with frequencies where possible.Ethics and disseminationEthical approval is not required for this study as it is a systematic review. We will report results from this systematic review in a peer-reviewed journal. The main value of this study will be to inform further research.PROSPERO registration numberCRD42018087500


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