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1899 citation(s) found for "Núñez, Sara".

American College of Rheumatology Guidance Statement for Diagnosis and Management of VEXAS Developed by the International VEXAS Working Group Expert Panel
Mékinian, A. , Georgin‐Lavaille, Sophie, Savic, Sinisa , Koster, Matthew J. , Comont, Thibault , Heilblig, Mael, Aróstegui, Juan I. , Bosco, Annmarie , Cargo, Catherine , Cattaneo, Chiara , Chasset, François , Coelho, Henrique , Ducharme‐Bénard, Stéphanie , Frassi, Micol, Hakobyan, Yervand , Jurcuț, Ciprian , Kirino, Yohei , Kunimoto, Hiroyoshi , Madigan, Lauren M. , Moráis, Sara , Sockel, Katja , Patnaik, Mrinal M. , Regadas, Luísa, Robin, Marie , Rutgers, Abraham , Salvarani, Carlo , Sammel, Anthony M. , Sujobert, Pierre , Tomelleri, Alessandro , Vandergheynst, Frédéric , Vieira, Romana, Viswanatha, David S., Diral, Elisa , Terrier, Benjamin , Fenaux, Pierre, Grayson, Peter C. , Beck, David B. , Diseases, the International VEXAS working group, and with endorsement of EuroBloodNet, the European Reference Network in Rare Hematological, Mékinian, Arsène , Koster, Matthew J , Bourguiba, Rim , Campochiaro, Corrado , Crisafulli, Francesca , Gurnari, Carmelo , Jamilloux, Yvan , Kirino, Yohei , Marvisi, Chiara , Milchert, Marcin , Rutgers, Abraham , Salvarani, Carlo , Tomelleri, Alessandro , Urbanski, Geoffrey , Terrier, Benjamin , Grayson, Peter C , Beck, David B , Robin, Marie , Savic, Sinisa , Georgin‐Lavialle, Sophie , Ferrada, Marcela A. , Kosmider, Olivier , Calvo, Katherine R. , Campochiaro, Corrado , Faria, Raquel , Franceschini, Franco , Groarke, Emma M , Gurnari, Carmelo , Kulasekararaj, Austin , Mann, H. , Marvisi, Chiara , Milchert, Marcin , Muratore, Francesco , Nakajima, Hideaki , Seebach, Jörg Dieter , Więsik–Szewczyk, Ewa , Patel, Bhavisha A. , Fenaux, Pierre , Diseases, the International VEXAS working group, and with endorsement of EuroBloodNet, the European Reference Network in Rare Hematological

Arthritis & Rheumatology | August 11, 2025 | Volume: 78 | Issue: 3 | Pages: 509-522

10.1002/art.43287 | PMID 40787890 Get It

Objective Vacuoles E1 enzyme X‐linked autoinflammatory somatic syndrome (VEXAS) is a recently identified rare genetic disorder associated with somatic mutations in the UBA1 gene. VEXAS presents with a combination of inflammatory and hematologic manifestations, leading to increased morbidity and mortality. Methods Given the variability in disease presentation and the limited number of studies to date, no clinical documents currently exist to provide guidance to health care providers about the management of VEXAS. To address this gap, we formed an international multidisciplinary panel of VEXAS experts. Results Through formalized meetings and a voting process, the group developed consensus clinical guidance considerations for the management of VEXAS. These considerations offer practical advice on several key topics: (1) clinical features of VEXAS, (2) UBA1 screening methods, (3) the diagnosis of myelodysplastic syndromes (MDSs) in patients with VEXAS, and (4) prognosis and management. The aim is to provide expert guidance on which patients to test, how to test for VEXAS, how to approach MDS in the context of VEXAS, and considerations for management. Conclusion This work marks the first formal international consensus guidance for VEXAS and is intended to be used as a resource for clinicians seeking to understand the disease and its management.
Menopause and Inflammatory Bowel Disease: A Systematic Review
Kale, Tanvi, Yoo, Linda , Kroeger, Ellie, Iqbal, Arwa, Kane, Sunanda V. , Shihab, Sara, Conley, Samantha , Kamp, Kendra , Conley, Samantha , Kroeger, Ellie, Iqbal, Arwa

Inflammatory Bowel Diseases | August 7, 2025 | Volume: 31 | Issue: 12 | Pages: 3443-3449

10.1093/ibd/izaf204 | PMID 41032035 Get It

Abstract Background Research is limited on the impacts of menopause, defined as the permanent cessation of ovarian function and decline of reproductive hormones, on gastrointestinal symptom severity and disease progression in women with inflammatory bowel disease (IBD). This review synthesizes current evidence on the impact of menopause, menopause transition, and hormonal therapy (HT) on disease activity, IBD and menopause symptom severity, and disease progression among individuals with IBD. Methods A systematic literature review was reported following PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines and preregistered at PROSPERO (CRD42024564901). Five databases were searched without date restrictions. Data extraction and risk-of-bias assessment were performed independently by multiple reviewers. Results were qualitatively synthesized. Results Of 1667 records, 15 studies met inclusion criteria (5 cohort, 3 case-control, 7 cross-sectional) with IBD sample sizes from 37 to 1367. Evidence on HT and IBD risk was mixed: some studies linked HT to increased ulcerative colitis risk while others found no significant association after adjusting for confounders. Women with IBD experience earlier menopause than healthy control subjects. While most women reported no change in IBD symptoms postmenopause, a minority reported symptom worsening. HT may reduce flare severity. Women with IBD reported more severe vulvovaginal symptoms and had distinct vaginal microbiome profiles compared with healthy control subjects. Conclusions Few studies have explored the relationship between menopause and IBD. There is a need for continued research on the relationship between IBD disease activity and menopause symptoms to create tailored interventions to improve women’s health with IBD across the lifespan.
Impact of Extending Beta-Lactam Infusions on IV Access Requirements
Kooda, Kirstin , Nelson, Julia, Ausman, Sara , Warfield, Micaela , Zhao, Yanjun , Frazee, Erin N. , Group, on behalf of the Beta Lactam Optimization and Outcomes Management (BLOOM) Study, Kooda, Kirstin J, Abu Saleh, Omar M, Warfield, Micaela N, Nelson, Julia, Ausman, Sara E , Rivera, Christina G. , Saleh, Omar M. Abu, Rule, Andrew D. , Stevens, Ryan W. , Group, on behalf of the Beta Lactam Optimization and Outcomes Management (BLOOM) Study

Critical Care Explorations | August 4, 2025 | Volume: 7 | Issue: 8 | Pages: e1299

10.1097/cce.0000000000001299 | PMID 40758359 Get It

This study aimed to determine if extended infusion (EI; over > 3 hr) beta-lactam therapy increased IV access requirements compared with traditional dosing (TD; over 30 min). Eighty-six adult ICU patients treated with TD anti-pseudomonal beta-lactams who underwent therapeutic drug monitoring (TDM) were included. Patients who transitioned from TD to EI after TDM (EI group) were matched 1:1 to patients who remained on TD. In the primary analysis, the median (interquartile range) total number of lumens in the 24 hours before TDM compared with the 48 hours after TDM were similar between groups (pre: TD 3 [2–5] vs. EI 4 [3–5]; p = 0.22 and post: TD 3 [2–4] vs. EI 4 [3–5]; p = 0.05). Delivery of beta-lactams via EI was not associated with a need for more IV access. Practical challenges such as access should not limit use of EI beta-lactams when indicated.
The Dublin International Society of Urological Pathology (ISUP) Consensus Conference on Best Practice Recommendations on the Pathology of Glandular Lesions of the Urinary Bladder
Paner, Gladell P. , Cunha, Isabela W. , Amin, Mahul B. , Aron, Manju , Athanazio, Daniel Abensur , Bambury, Richard , Cheng, Liang, Gopalan, Anuradha , Gulmann, Christian, Harris, Carole A. , Jiménez, Rafael E. , Jinzaki, Masahiro , Lal, Priti , Miyai, Kosuke , Netto, George J. , Pan, Chin-Chen, Rhijn, Bas W. van, Smith, Steven C. , Wobker, Sara E. , Reis, Henning , Lesions, ISUP Expert Panel On Urachal Neoplasms and Urinary Bladder Glandular, Cheng, Liang , Cheng, Liang , Al-Ahmadie, Hikmat A , Gaisa, Nadine Therese , López-Beltrán, Antonio , Maclean, Fiona M. , Tsuzuki, Toyonori , Aning, Jonathan J. , Guo, Charles Chuanhai , Iyer, Gopa , Kikuchi, Eiji , Pan, Chin‐Chen , Panebianco, Valeria , Siefker-Radtke, Arlene Odelia , Szarvas, Tibor , Kristiansen, Glen , Lesions, ISUP Expert Panel On Urachal Neoplasms and Urinary Bladder Glandular

Advances in Anatomic Pathology | August 4, 2025 | Volume: 33 | Issue: 1 | Pages: 1-16

10.1097/pap.0000000000000510 | PMID 40757456 Get It

The Dublin ISUP Consensus Conference covered the proceedings on the best practice recommendations on nonurachal glandular lesions of the urinary bladder, bladder diverticular cancers, and molecular features of bladder and urachal glandular lesions. The conference proceedings on urachal neoplasms (except for their molecular features) are published elsewhere. The rationale for convening this conference was the lack of structured and consented pathologic recommendations in these rare lesions. Consensus by participants was reached on the following statements: (1) intestinal metaplasia with dysplasia is considered to be a precursor to primary bladder adenocarcinoma; (2) dysplasia arising from cystitis glandularis should be reported in terms of focality (focal or nonfocal) and grade (low or high); (3) the term “adenocarcinoma” should only be used for carcinomas showing pure (nonurothelial) morphology and should not be used interchangeably in urothelial carcinoma with “glandular differentiation” because of the pathobiological differences and management implications; (4) the different histologic subtypes of bladder adenocarcinoma should be specified in the report; (5) immunohistochemistry has an ancillary role in the work up of bladder adenocarcinoma versus gastrointestinal or Müllerian-type adenocarcinomas; (6) lymphovascular invasion should be included as a parameter when reporting bladder adenocarcinoma; (7) representative or targeted sampling will be sufficient for bladder diverticulum resection specimens; and (8) molecular analysis in genomic profiling should be performed only in advanced or metastatic bladder and urachal adenocarcinomas for targetable therapy. This report on glandular (nonurachal) lesions of the bladder from the Dublin ISUP consensus conference will serve as a best practice recommendation and as a guide for future research on these relatively rare lesions.
Prostate T2-Weighted Spin-Echo MRI With and Without Glucagon: A Paired Scan Quality Assessment
Hassanzadeh, Sara, Froemming, Adam T. , Takahashi, Naoki , Riederer, Stephen J. , Takahashi, Naoki , Borisch, Eric A. , Kawashima, Akira

No container title available | August 1, 2025 | Volume: No volume available | Issue: No issue available | Pages: No page available

10.21203/rs.3.rs-7217403/v1 Get It

Abstract Purpose To evaluate the effectiveness of subcutaneous glucagon in reducing motion artifact during prostate MRI through intraindividual comparison. Methods At our institution patients undergoing a clinical prostate MRI exam receive 1 mg of subcutaneous glucagon before scanning. From February 15, 2024 to February 11, 2025 33 such patients were recruited to undergo an additional, research exam without glucagon. All exams were acquired at 3T. An axial T2-weighted spin-echo series (T2-WI) was acquired within both exams. Evaluation of the T2-WI series was done by three experienced radiologists using the criteria of diagnostic quality (0–3 scale), PI-QUALv2 (0–3 sum), motion artifact (significant, visible, none), and reviewer preference (five-point relative scale). Due to differences in prescribed coverage, the scan times for the two T2-WI sequences were in general different for each subject. Results were stratified using the acquisition time ratio (Trel) between the glucagon vs. non-glucagon scans. Wilcoxon tests assessed score differences. Results Across all 33 subjects, no significant differences were found between glucagon and non-glucagon scans. However, the observed negative correlation between glucagon preference and Trel (p = 0.026) led to stratification into low-Trel (n = 16) and high-Trel (n = 17) groups. In the low-Trel group the glucagon scans provided significantly improved diagnostic quality (p = 0.048), PI-QUALv2 sum (p = 0.049), motion scores (p = 0.047), and reader preference (p = 0.042). Conclusion Subcutaneous glucagon provides improved image quality in prostate T2-WI MRI when scan duration remains within 1.25× of that of a non-glucagon T2-WI series. The benefit appears to decrease with longer scan times.
Interobserver Reproducibility of Pelvicalyceal Invasion in Renal Cell Carcinoma Nephrectomies Among Genitourinary Pathologists
Sangoi, Ankur R. , Mubeen, Aysha , Humble, Robert , Wu, Douglas, Amin, Mahul, Aron, Manju , Brimo, Fadi , Chan, Emily , Cheng, Liang, Cheville, John C. , Collins, Katrina, Cornejo, Kristine M. , Downes, Michelle R. , Epstein, Jonathan I. , Hirsch, Michelle S. , Mohanty, Sambit K. , Netto, George J. , Osunkoya, Adeboye O. , Paner, Gladell P. , Rao, Priya, Smith, Steven C. , Tickoo, Satish K. , Tretiakova, Maria , Trpkov, Kiril , Wobker, Sara E. , Tamboli, Pheroze, Zynger, Debra L. , Cheng, Liang , Collins, Katrina , Cheng, Liang , Sangoi, Ankur R , Tretiakova, Maria S , Trpkov, Kiril , Akgül, Mahmut , Pacheco, Richard R. , Acosta, Andrés , Amin, Mahul, Dhillon, Jasreman , Kapur, Payal , Lobo, Anandi , Mehra, Rohit, Saleeb, Rola , Shah, Rajal B. , Shen, Steven S. , Tamboli, Pheroze, Williamson, Sean R.

American Journal of Surgical Pathology | July 30, 2025 | Volume: 49 | Issue: 12 | Pages: 1307-1314

10.1097/pas.0000000000002456 | PMID 40734292 Get It

Pelvicalyceal invasion (PCI) is a relatively novel pT3a staging parameter for renal cell carcinoma (RCC) nephrectomies. While interobserver reproducibility staging studies of sinus/vascular invasion in RCC exist, a similar evaluation for PCI has not been performed. Moreover, in our experience, there is also diagnostic variability in how pathologists interpret PCI. Herein, we explore interobserver reproducibility among genitourinary (GU) pathologists. Twenty hematoxylin and eosin-stained digitized slides from RCCs (all grossly approaching the renal pelvis) were distributed to 31 GU pathologists to classify each as PCI or not PCI based on their respective clinical practices; slides with concomitant sinus/fat/vascular invasion were excluded. Slides were then evaluated for the following 4 morphologic features: tumor abutting renal pelvis, tumor pushing/indenting into the renal pelvis, polypoid configuration of tumor into the renal pelvis, and tumor eroding through renal pelvic urothelium. Interobserver reproducibility was assessed, and the morphologic features were correlated with PCI. Relationships between pathologists’ interpretations, morphologic features, and PCI were evaluated using hierarchical clustering. Although the diagnosis of PCI was relatively uniform with a majority agreement (>67%) reached in 16/20 slides, overall interobserver reproducibility was only moderate (kappa=0.601). While all 4 morphologic features were sensitive for PCI, polypoid configuration of the tumor into the renal pelvis and the tumor eroding through the renal pelvic urothelium were most specific (90%, 100%, respectively). Although we show general consensus among genitourinary pathologists on PCI assessment, clarifying the diagnostic guidelines with specific criteria should be included in pathologic staging systems.
Cost‐Utility Analysis of a Group Mindfulness Program Compared to an Education Support Program for Breast Cancer Survivors With Cognitive Impairment: Evidence From a Randomized Controlled Trial
Tate, Rio , Park, Jong Y. , Hueluer, Gizem, Nguyen, Anh , Veal, Britney , Joshi, Anisha, Krothapalli, Mahathi, Nidamanur, Sreenidhi, Cox, Charles, Padgett, Lynne, Bornstein, Elizabeth, Lucas, Jean M., Fonseca, Tamela , Donovan, Kristine A. , Chamkeri, Ramya, Reich, Richard R. , Park, Jong Y , Veal, Britney , Fonseca, Tamela , Meng, Hongdao , Lengacher, Cecile A. , Rodriguez, Carmen S , Kip, Kevin E. , Morgan, Sandra P. , Tinsley, Sara , Cox, Charles E., Moscoso, Manolete S.

Psycho-Oncology | July 23, 2025 | Volume: 34 | Issue: 7 | Pages: No page available

10.1002/pon.70220 | PMID 40696563 Get It

ABSTRACTObjectiveTo conduct an economic evaluation of a group mindfulness program compared to an education support program for breast cancer survivors (BCS).MethodsThe cost‐utility analysis (cost per quality‐adjusted life year [QALY]) was performed from a single‐center randomized controlled trial in the United States. Data from 181 BCS were included in the analysis (91 from the mindfulness‐based stress reduction for breast cancer, MBSR(BC) and 90 from the Breast Cancer Education Support, (BCES)). Analyses were conducted from two perspectives: societal and healthcare system. The EuroQol EQ‐5D‐5L was used to measure quality of life and the Client Service Receipt Inventory (CSRI) was used to measure health services utilization from baseline through 26 weeks. The impact of MBSR(BC) on health services utilization and costs was estimated with generalized linear models.ResultsIn the reference case analyses (societal perspective), the average total cost in the MBSR(BC) group was $5744 compared with $6140 in the BCES group. At the end of follow‐up, the MBSR(BC) group dominated BCES in terms of Incremental Cost Utility Ratio (ICUR), with MBSR(BC) providing an incremental cost of −$541 (95% CI: −$3400, $2318) and a 0.021 QALY (95% CI: −0.014, 0.055). Net monetary benefit (NMB) analysis showed that MBSR(BC) has a higher probability of achieving positive NMB across a range of possible societal willingness‐to‐pay for improving quality of life.ConclusionsOur findings suggest that MBSR(BC) is likely to be cost‐effective for breast cancer survivors over 6 months. Cost savings primarily resulted from reduced ER and hospital admissions and tests.
Glucagon-like Peptide-1 Receptor Agonist Therapy Is Associated With Fewer Medical Complications After Carpal Tunnel Release in Diabetic Patients
Hiredesai, Annika N. , Howlett, Carina P., Kisiel, Sara C. , Unadkat, Krishna , Verhey, Jens T. , Renfree, Kevin J. , Noland, Shelley S. , Renfree, Kevin , Unadkat, Krishna D , Howlett, Carina P.

HAND | July 16, 2025 | Volume: 21 | Issue: 6 | Pages: 922-929

10.1177/15589447251350181 | PMID 40667672 Get It

Background: Diabetic patients experience carpal tunnel syndrome (CTS) at high rates, have increased symptom severity, and experience prolonged recovery after carpal tunnel release (CTR). This study assessed the association of glucagon-like peptide-1 receptor agonist (GLP-1) therapy with postoperative outcomes after CTR in type II diabetic patients with CTS. Methods: Using the PearlDiver database, 25 229 diabetic patients with CTS who underwent CTR and were prescribed GLP-1 therapy were identified and exact matched to 25 229 controls based on age, sex, Elixhauser comorbidity index, tobacco use, obesity, hypothyroidism, and body mass index where available. Demographic variables and comorbidities were compared between groups using Kruskal-Wallis analyses for continuous variables and chi-square tests for categorical variables. Bivariate logistic regression analysis was conducted for 90-day outcomes and 2-year CTR revision. Results: Patients on GLP-1 therapy had decreased risk of 90-day medical complications (odds ratio [OR] = 0.90; 95% confidence interval [CI], 0.84-0.96) and hospital readmission (OR = 0.85; 95% CI, 0.77-0.94) of 0.5% and 0.4%, respectively, compared with controls. No significant differences were found in 90-day surgical complications or 2-year revision rates between cohorts. There were no cases of aspiration pneumonia. The GLP-1 cohort had increased odds of higher 90-day total costs of care (OR = 2.42; 95% CI, 1.88-3.15). Conclusions: GLP-1 therapy is associated with reduced risk of 90-day medical complications and hospital readmission following CTR in diabetic patients, suggesting these medications may optimize comorbidity profiles via glucose control preoperatively. Future studies may examine whether GLP-1 therapy is associated with minimum clinically important difference in patient-reported outcome measures for CTS in diabetic patients.
The role of imaging studies in predicting time to first treatment and overall survival in high‐count monoclonal B‐cell lymphocytosis
Kosydar, Samuel , Archibald, William J. , Hampel, Paul J. , Call, Timothy G. , Achenbach, Sara J., Rabe, Kari G. , Hanson, Curtis A. , Koehler, Amber B. , Muchtar, Eli , Kenderian, Saad S. , Leis, José F., Schwager, Susan M., Wang, Yucai , Hilal, Talal , Parrondo, Ricardo D , Shi, Min , Parikh, Sameer A , Chaffee, Kari G. , Kenderian, Saad Sirop , Muchtar, E , Kosydar, Samuel R , Achenbach, Sara J., Wang, Yucai , Roeker, Lindsey E. , Hilal, Talal , Tsang, Mazie , Braggio, Esteban , Slager, Susan L. , Kay, Neil E. , Parikh, Sameer A.

British Journal of Haematology | July 16, 2025 | Volume: 207 | Issue: 3 | Pages: 860-868

10.1111/bjh.70009 | PMID 40664436 Get It

SummaryIn individuals with high‐count monoclonal B‐cell lymphocytosis (MBL), we investigated if lymphadenopathy or splenomegaly found by imaging was associated with shorter time to first chronic lymphocytic leukaemia (CLL) therapy (TTFT) and overall survival (OS). Individuals with MBL seen at Mayo Clinic (2002–2019) were retrospectively divided into three cohorts based on imaging studies within 1 year of diagnosis: no imaging studies (Cohort A); imaging with no evidence of lymphadenopathy/splenomegaly (Cohort B); imaging with evidence of lymphadenopathy/splenomegaly (Cohort C). We compared baseline characteristics, TTFT and OS across the MBL cohorts to a cohort of individuals with small lymphocytic lymphoma (SLL). A total of 1078 patients were included: 640 with MBL and 438 with SLL. Compared to Cohort B, individuals in Cohort C were more likely to have unmutated immunoglobulin heavy chain variable region (IGHV) (43% vs. 25% p = 0.016), high‐risk fluorescence in situ hybridization (FISH) (del17p and del11q in 15% vs. 4%, p = 0.038) and higher expression of CD38 (31% vs. 16%; p = 0.011). After adjusting for sex and CLL‐International Prognostic Index (IPI), lymphadenopathy/splenomegaly was associated with a shorter TTFT (hazard ratio [HR] = 2.04, 95% confidence interval [CI]: 1.02–4.04, p = 0.042) but not OS (HR = 1.09, 95% CI: 0.62–1.92, p = 0.775). Lymphadenopathy/splenomegaly on imaging in individuals with high‐count MBL is associated with a more unfavourable risk profile and shorter time to first CLL‐directed therapy.
Multicenter evaluation of blood culture contamination and blood cultures practices in US acute care hospitals: time for standardization
Fabre, Valeria , Hsu, Yea‐Jen , Carroll, Karen C. , Salinas, Alejandra , Abbo, Lilian M. , Bower, Chris , Berry, J. Michael, Degnan, Kathleen, Dhaubhadel, Pragya, Dress, Marci, Feeser, Baevin , Fisher, Mark , Flynn, Cynthia E. , Gettler, Erin , Glasser, Laurel J., Johnson, J. Kristie, Karaba, Sara M. , Kubischta, Alyssa, Landrum, B. Mark, Martinez, Marvin, Mermel, Leonard A. , Pepe, Dana , Qasba, Sonia, Rittmann, Barry , Robinson, Evan D. , Rosa, Rossana , Salinas, Jorge , Shah, Aditya , Schrank, Gregory M. , Spivak, Emily S , Stewart, Kathleen O., Wasylyshyn, Anastasia , Virk, Zunaira, Cosgrove, Sara E. , Abbo, Lilian M , Karaba, Sara M , Fabre, Valeria , Milstone, Aaron M. , Berry, Jennifer, Boyd, Sarah, Diekema, Daniel J. , Ford, Bradley , Glasser, Laurel J., Howard‐Anderson, Jessica , Kim, Justin , Mathers, Amy J. , Moehring, Rebekah W. , O’Horo, John C. , Rodriguez‐Nava, Guillermo , Ryder, Jonathan H. , Shelly, Mark , Talbot, Thomas R. , Schooneveld, Trevor Van , Gadala, Avinash

Journal of Clinical Microbiology | July 11, 2025 | Volume: 63 | Issue: 8 | Pages: No page available

10.1128/jcm.00530-25 | PMID 40643261 Get It

ABSTRACT Clinical and Laboratory Standards Institute (CLSI) recommends a blood culture contamination (BCC) threshold of <3%, with ≤1% considered optimal. However, there is not a standardized definition of BCC, and the effect of multiple definitions on BCC rates or what definitions laboratories use remain unknown. We surveyed 52 hospitals and analyzed 362,078 blood cultures (BCx) collected 1 September 2019 to 31 August 2021 from 62 intensive care units (ICUs) and 231 wards from 48 of these hospitals. We calculated and compared BCC rates using the College of American Pathologists (CAP) or CLSI criteria (both utilize a limited number of skin commensals to define BCC) and the comprehensive National Healthcare Safety Network (NHSN) commensal list. We characterized factors associated with BCC and related outcomes (central-line associated bloodstream infection [CLABSI] and vancomycin use). BCC, BCx positivity, and single BCx rates were monitored by 100%, 39%, and 21% of hospitals, respectively. Hospitals used CAP (65%), CLSI (17%), and NHSN (17%) criteria to define BCC. Mean BCC rate by CAP (CAP-BCC) was 1.38% for ICUs and 0.96% for wards. BCC rates remained similar by CLSI criteria but increased when using NHSN list. Sharing BCC data outside of the laboratory, measuring additional BCx quality indicators, and limiting central catheter-drawn BCx were associated with lower BCC rates. BCC was associated with higher CLABSI rates in ICUs. This study demonstrated variability in laboratory practices and opportunities to optimize BCx stewardship. IMPORTANCE Blood culture contamination (BCC) is associated with patient harm and unnecessary use of healthcare resources. BCC thresholds have been established; however, multiple BCC definitions exist. There is limited data on how BCC rates differ depending on the BCC definition used, what definitions laboratories most commonly use, or their approach to other blood cultures (BCx) quality indicators such as single rates or BCx positivity. A cross-sectional multicenter survey and analysis of BCx data from intensive care unit and wards revealed that most laboratories did not track single BCx or BCx positivity rates and that there was variability in how BCC was defined. Additionally, BCC rates were influenced by the definition used. BCC was associated with increased central-line associated bloodstream infection rates.