Browsing by Author "St. Peter, Shawn D."

Now showing 1 - 10 of 11
  • Thumbnail Image
    Item
    Accuracy of Chest Computed Tomography in Distinguishing Cystic Pleuropulmonary Blastoma From Benign Congenital Lung Malformations in Children
    (American Medical Association, 2022-06-01) Engwall-Gill, Abigail J.; Chan, Sherwin S.; Boyd, Kevin P.; Saito, Jacqueline M.; Fallat, Mary E.; St. Peter, Shawn D.; Bolger-Theut, Stephanie; Crotty, Eric J.; Green, Jared R.; Hulett Bowling, Rebecca L.; Kumbhar, Sachin S.; Rattan, Mantosh S.; Young, Cody M.; Canner, Joseph K.; Deans, Katherine J.; Gadepalli, Samir K.; Helmrath, Michael A.; Hirschl, Ronald B.; Kabre, Rashmi; Lal, Dave R.; Landman, Matthew P.; Leys, Charles M.; Mak, Grace Z.; Minneci, Peter C.; Wright, Tiffany N.; Kunisaki, Shaun M.; Midwest Pediatric Surgery Consortium; Surgery, School of Medicine
    Importance: The ability of computed tomography (CT) to distinguish between benign congenital lung malformations and malignant cystic pleuropulmonary blastomas (PPBs) is unclear. Objective: To assess whether chest CT can detect malignant tumors among postnatally detected lung lesions in children. Design, setting, and participants: This retrospective multicenter case-control study used a consortium database of 521 pathologically confirmed primary lung lesions from January 1, 2009, through December 31, 2015, to assess diagnostic accuracy. Preoperative CT scans of children with cystic PPB (cases) were selected and age-matched with CT scans from patients with postnatally detected congenital lung malformations (controls). Statistical analysis was performed from January 18 to September 6, 2020. Preoperative CT scans were interpreted independently by 9 experienced pediatric radiologists in a blinded fashion and analyzed from January 24, 2019, to September 6, 2020. Main outcomes and measures: Accuracy, sensitivity, and specificity of CT in correctly identifying children with malignant tumors. Results: Among 477 CT scans identified (282 boys [59%]; median age at CT, 3.6 months [IQR, 1.2-7.2 months]; median age at resection, 6.9 months [IQR, 4.2-12.8 months]), 40 cases were extensively reviewed; 9 cases (23%) had pathologically confirmed cystic PPB. The median age at CT was 7.3 months (IQR, 2.9-22.4 months), and median age at resection was 8.7 months (IQR, 5.0-24.4 months). The sensitivity of CT for detecting PPB was 58%, and the specificity was 83%. High suspicion for malignancy correlated with PPB pathology (odds ratio, 13.5; 95% CI, 2.7-67.3; P = .002). There was poor interrater reliability (κ = 0.36 [range, 0.06-0.64]; P < .001) and no significant difference in specific imaging characteristics between PPB and benign cystic lesions. The overall accuracy rate for distinguishing benign vs malignant lesions was 81%. Conclusions and relevance: This study suggests that chest CT, the current criterion standard imaging modality to assess the lung parenchyma, may not accurately and reliably distinguish PPB from benign congenital lung malformations in children. In any cystic lung lesion without a prenatal diagnosis, operative management to confirm pathologic diagnosis is warranted.
  • Thumbnail Image
    Item
    Can Fecal Continence be Predicted in Patients Born with Anorectal Malformations?
    (Elsevier, 2019) Minneci, Peter C.; Kabre, Rashmi S.; Mak, Grace Z.; Halleran, Devin R.; Cooper, Jennifer N.; Afrazi, Amin; Calkins, Casey M.; Corkum, Kristine; Downard, Cynthia D.; Ehrlich, Peter; Fraser, Jason D.; Gadepalli, Samir K.; Helmrath, Michael A.; Kohler, Jonathan E.; Landisch, Rachel; Landman, Matthew P.; Lee, Constance; Leys, Charles M.; Lodwick, Daniel L.; McLeod, Jennifer; Mon, Rodrigo; McClure, Beth; Rymeski, Beth; Saito, Jacqueline M.; Sato, Thomas T.; St. Peter, Shawn D.; Wood, Richard; Levitt, Marc A.; Deans, Katherine J.; Surgery, School of Medicine
    Purpose The purpose of this study was to identify factors associated with attaining fecal continence in children with anorectal malformations (ARM). Methods We performed a multi-institutional cohort study of children born with ARM in 2007–2011 who had spinal and sacral imaging. Questions from the Baylor Social Continence Scale were used to assess fecal continence at the age of ≥ 4 years. Factors present at birth that predicted continence were identified using multivariable logistic regression. Results Among 144 ARM patients with a median age of 7 years (IQR 6–8), 58 (40%) were continent. The rate of fecal continence varied by ARM subtype (p = 0.002) with the highest rate of continence in patients with perineal fistula (60%). Spinal anomalies and the lateral sacral ratio were not associated with continence. On multivariable analysis, patients with less severe ARM subtypes (perineal fistula, recto-bulbar fistula, recto-vestibular fistula, no fistula, rectal stenosis) were more likely to be continent (OR = 7.4, p = 0.001). Conclusion Type of ARM was the only factor that predicted fecal continence in children with ARM. The high degree of incontinence, even in the least severe subtypes, highlights that predicting fecal continence is difficult at birth and supports the need for long-term follow-up and bowel management programs for children with ARM.
  • Thumbnail Image
    Item
    Changing the Paradigm for Management of Pediatric Primary Spontaneous Pneumothorax: A Simple Aspiration Test Predicts Need for Operation
    (Elsevier, 2019) Leys, Charles M.; Hirschl, Ronald B.; Kohler, Jonathan E.; Cherney-Stafford, Linda; Marka, Nicholas; Fallat, Mary E.; Gadepalli, Samir K.; Fraser, Jason D.; Grabowski, Julia; Burns, R. Cartland; Downard, Cynthia D.; Foley, David S.; Halleran, Devin R.; Helmrath, Michael A.; Kabre, Rashmi; Knezevich, Michellle S.; Lal, Dave R.; Landman, Matthew P.; Lawrence, Amy E.; Mak, Grace Z.; Minneci, Peter C.; Musili, Ninette; Rymeski, Beth; Saito, Jacqueline M.; Sato, Thomas T.; St. Peter, Shawn D.; Warner, Brad W.; Ostlie, Daniel J.; Surgery, School of Medicine
    Purpose Chest tube (CT) management for pediatric primary spontaneous pneumothorax (PSP) is associated with long hospital stays and high recurrence rates. To streamline management, we explored simple aspiration as a test to predict need for surgery. Methods A multi-institution, prospective pilot study of patients with first presentation for PSP at 9 children’s hospitals was performed. Aspiration was performed through a pigtail catheter, followed by 6 h observation with CT clamped. If pneumothorax recurred during observation, the aspiration test failed and subsequent management was per surgeon discretion. Results Thirty-three patients were managed with simple aspiration. Aspiration was successful in 16 of 33 (48%), while 17 (52%) failed the aspiration test and required hospitalization. Twelve who failed aspiration underwent CT management, of which 10 (83%) failed CT management owing to either persistent air leak requiring VATS or subsequent PSP recurrence. Recurrence rate was significantly greater in the group that failed aspiration compared to the group that passed aspiration [10/12 (83%) vs 7/16 (44%), respectively, P = 0.028]. Conclusion Simple aspiration test upon presentation with PSP predicts chest tube failure with 83% positive predictive value. We recommend changing the PSP management algorithm to include an initial simple aspiration test, and if that fails, proceed directly to VATS.
  • Thumbnail Image
    Item
    Current operative management of congenital lobar emphysema in children: A report from the Midwest Pediatric Surgery Consortium
    (Elsevier, 2019) Kunisaki, Shaun M.; Saito, Jacqueline M.; Fallat, Mary E.; St. Peter, Shawn D.; Kim, Aimee G.; Johnson, Kevin N.; Mon, Rodrigo A.; Adams, Cheryl; Aladegbami, Bola; Bence, Christina; Burns, R. Cartland; Corkum, Kristine S.; Deans, Katherine J.; Downard, Cynthia D.; Fraser, Jason D.; Gadepalli, Samir K.; Helmrath, Michael A.; Kabre, Rashmi; Lal, Dave R.; Landman, Matthew P.; Leys, Charles M.; Linden, Allison F.; Lopez, Joseph J.; Mak, Grace Z.; Minneci, Peter C.; Rademacher, Brooks L.; Shaaban, Aimen; Walker, Sarah K.; Wright, Tiffany N.; Hirschl, Ronald B.; Surgery, School of Medicine
    Purpose The purpose of this study was to evaluate the clinical presentation and operative outcomes of patients with congenital lobar emphysema (CLE) within a large multicenter research consortium. Methods After central reliance IRB-approval, a retrospective cohort study was performed on all operatively managed lung malformations at eleven participating children's hospitals (2009–2015). Results Fifty-three (10.5%) children with pathology-confirmed CLE were identified among 506 lung malformations. A lung mass was detected prenatally in 13 (24.5%) compared to 331 (73.1%) in non-CLE cases (p < 0.0001). Thirty-two (60.4%) CLE patients presented with respiratory symptoms at birth compared to 102 (22.7%) in non-CLE (p < 0.0001). The most common locations for CLE were the left upper (n = 24, 45.3%), right middle (n = 16, 30.2%), and right upper (n = 10, 18.9%) lobes. Eighteen (34.0%) had resection as neonates, 30 (56.6%) had surgery at 1–12 months of age, and five (9.4%) had resections after 12 months. Six (11.3%) underwent thoracoscopic excision. Median hospital length of stay was 5.0 days (interquartile range, 4.0–13.0). Conclusions Among lung malformations, CLE is associated with several unique features, including a low prenatal detection rate, a predilection for the upper/middle lobes, and infrequent utilization of thoracoscopy. Although respiratory distress at birth is common, CLE often presents clinically in a delayed and more insidious fashion.
  • Thumbnail Image
    Item
    Development of a multi-institutional registry for children with operative congenital lung malformations
    (Elsevier, 2019) Kunisaki, Shaun M.; Saito, Jacqueline M.; Fallat, Mary E.; St. Peter, Shawn D.; Lal, Dave R.; Johnson, Kevin N.; Mon, Rodrigo A.; Adams, Cheryl; Aladegbami, Bola; Bence, Christina; Burns, R. Cartland; Corkum, Kristine S.; Deans, Katherine J.; Downard, Cynthia D.; Fraser, Jason D.; Gadepalli, Samir K.; Helmrath, Michael A.; Kabre, Rashmi; Landman, Matthew P.; Leys, Charles M.; Linden, Allison F.; Lopez, Joseph J.; Mak, Grace Z.; Minneci, Peter C.; Rademacher, Brooks L.; Shaaban, Aimen; Walker, Sarah K.; Wright, Tiffany N.; Hirschl, Ronald B.; Surgery, School of Medicine
    Introduction The purpose of this study was to develop a multi-institutional registry to characterize the demographics, management, and outcomes of a contemporary cohort of children undergoing congenital lung malformation (CLM) resection. Methods After central reliance IRB approval, a web-based, secure database was created to capture retrospective cohort data on pathologically-confirmed CLMs performed between 2009 and 2015 within a multi-institutional research collaborative. Results Eleven children's hospitals contributed 506 patients. Among 344 prenatally diagnosed lesions, the congenital pulmonary airway malformation volume ratio was measured in 49.1%, and fetal MRI was performed in 34.3%. One hundred thirty-four (26.7%) children had respiratory symptoms at birth. Fifty-eight (11.6%) underwent neonatal resection, 322 (64.1%) had surgery at 1–12 months, and 122 (24.3%) had operations after 12 months. The median age at resection was 6.7 months (interquartile range, 3.6–11.4). Among 230 elective lobectomies performed in asymptomatic patients, thoracoscopy was successfully utilized in 102 (44.3%), but there was substantial variation across centers. The most common lesions were congenital pulmonary airway malformation (n = 234, 47.3%) and intralobar bronchopulmonary sequestration (n = 106, 21.4%). Conclusion This multicenter cohort study on operative CLMs highlights marked disease heterogeneity and substantial practice variation in preoperative evaluation and operative management. Future registry studies are planned to help establish evidence-based guidelines to optimize the care of these patients.
  • Thumbnail Image
    Item
    Evaluating the Regional Differences in Pediatric Injury Patterns During the COVID-19 Pandemic
    (Elsevier, 2023) Collings, Amelia T.; Farazi, Manzur; Van Arendonk, Kyle J.; Fallat, Mary E.; Minneci, Peter C.; Sato, Thomas T.; Speck, K. Elizabeth; Gadepalli, Samir; Deans, Katherine J.; Falcone, Richard A., Jr.; Foley, David S.; Fraser, Jason D.; Keller, Martin S.; Kotagal, Meera; Landman, Matthew P.; Leys, Charles M.; Markel, Troy; Rubalcava, Nathan; St. Peter, Shawn D.; Flynn-O'Brien, Katherine T.; Midwest Pediatric Surgery Consortium; Surgery, School of Medicine
    Introduction: Reports of pediatric injury patterns during the COVID-19 pandemic are conflicting and lack the granularity to explore differences across regions. We hypothesized there would be considerable variation in injury patterns across pediatric trauma centers in the United States. Materials and methods: A multicenter, retrospective study evaluating patients <18 y old with traumatic injuries meeting National Trauma Data Bank criteria was performed. Patients injured after stay-at-home orders through September 2020 ("COVID" cohort) were compared to "Historical" controls from an averaged period of equivalent dates in 2016-2019. Differences in injury type, intent, and mechanism were explored at the site level. Results: 47,385 pediatric trauma patients were included. Overall trauma volume increased during the COVID cohort compared to the Historical (COVID 7068 patients versus Historical 5891 patients); however, some sites demonstrated a decrease in overall trauma of 25% while others had an increase of over 33%. Bicycle injuries increased at every site, with a range in percent change from 24% to 135% increase. Although the greatest net increase was due to blunt injuries, there was a greater relative increase in penetrating injuries at 7/9 sites, with a range in percent change from a 110% increase to a 69% decrease. Conclusions: There was considerable discrepancy in pediatric injury patterns at the individual site level, perhaps suggesting a variable impact of the specific sociopolitical climate and pandemic policies of each catchment area. Investigation of the unique response of the community during times of stress at pediatric trauma centers is warranted to be better prepared for future environmental stressors.
  • Thumbnail Image
    Item
    Impact of “Stay-at-Home”orders on non-accidental trauma: A multi-institutional study
    (Elsevier, 2022) Collings, Amelia T.; Farazi, Manzur; Van Arendonk, Kyle; Fallat, Mary E.; Minneci, Peter C.; Sato, Thomas T.; Speck, K. Elizabeth; Deans, Katherine J.; Falcone, Richard A.; Foley, David S.; Fraser, Jason D.; Keller, Martin S.; Kotagal, Meera; Landman, Matthew P.; Leys, Charles M.; Markel, Troy; Rubalcava, Nathan; St. Peter, Shawn D.; Flynn-O’Brien, Katherine T.; Midwest Pediatric Surgery Consortium; Surgery, School of Medicine
    Background: It is unclear how Stay-at-Home Orders (SHO) of the COVID-19 pandemic impacted the welfare of children and rates of non-accidental trauma (NAT). We hypothesized that NAT would initially decrease during the SHO as children did not have access to mandatory reporters, and then increase as physicians' offices and schools reopened. Methods: A multicenter study evaluating patients <18 years with ICD-10 Diagnosis and/or External Cause of Injury codes meeting criteria for NAT. "Historical" controls from an averaged period of March-September 2016-2019 were compared to patients injured March-September 2020, after the implementation of SHO ("COVID" cohort). An interrupted time series analysis was utilized to evaluate the effects of SHO implementation. Results: Nine Level I pediatric trauma centers contributed 2064 patients meeting NAT criteria. During initial SHO, NAT rates dropped below what was expected based on historical trends; however, thereafter the rate increased above the expected. The COVID cohort experienced a significant increase in the proportion of NAT patients age ≥5 years, minority children, and least resourced as determined by social vulnerability index (SVI). Conclusions: The COVID-19 pandemic affected the presentation of children with NAT to the hospital. In times of public health crisis, maintaining systems of protection for children remain essential.
  • Thumbnail Image
    Item
    The Incidence of Venous Thromboembolism in Children Following Colorectal Resection for Inflammatory Bowel Disease: A Multi-Center Study
    (Elsevier, 2020) Bence, Christina M.; Traynor, Michael D., Jr.; Polites, Stephanie F.; Ha, Derrick; Muenks, Pete; St. Peter, Shawn D.; Landman, Matthew P.; Densmore, John C.; Potter, D. Dean, Jr.; Surgery, School of Medicine
    Background/Purpose Children with inflammatory bowel disease (IBD) have increased risk for venous thromboembolism (VTE). We sought to determine incidence and risk factors for postoperative VTE in a multicenter cohort of pediatric patients undergoing colorectal resection for IBD. Methods Retrospective review of children ≤18 years who underwent colorectal resection for IBD from 2010 to 2016 was performed at four children's hospitals. Primary outcome was VTE that occurred between surgery and last follow-up. Factors associated with VTE were determined using univariable and multivariable analyses. Results Two hundred seventy-six patients were included with median age 15 years [13,17]. Forty-two children (15%) received perioperative VTE chemoprophylaxis, and 88 (32%) received mechanical prophylaxis. DVT occurred in 12 patients (4.3%) at a median of 14 days postoperatively [8,147]. Most were portomesenteric (n = 9, 75%) with the remaining catheter-associated DVTs in extremities (n = 3, 25%). There was no association with chemoprophylaxis (p > 0.99). On Cox regression, emergent procedure [HR 18.8, 95%CI: 3.18–111], perioperative plasma transfusion [HR 25.1, 95%CI: 2.4–259], and postoperative infectious complication [HR 10.5, 95%CI: 2.63–41.8] remained predictive of DVT. Conclusion Less than 5% of pediatric IBD patients developed postoperative VTE. Chemoprophylaxis was not protective but rarely used. Patients with risk factors identified in this study should be monitored or given prophylaxis for VTE.
  • Thumbnail Image
    Item
    Infants with esophageal atresia and right aortic arch: Characteristics and outcomes from the Midwest Pediatric Surgery Consortium
    (Elsevier, 2018) Lal, Dave R.; Gadepalli, Samir K.; Downard, Cynthia D.; Minneci, Peter C.; Knezevich, Michelle; Chelius, Thomas H.; Rapp, Cooper T.; Bilmire, Deborah; Bruch, Steven; Burns, R. Carland; Deans, Katherine J.; Fallat, Mary E.; Fraser, Jason D.; Grabowski, Julia; Hebel, Ferdynand; Helmrath, Michael A.; Hirschl, Ronald B.; Kabre, Rashmi; Kohler, Jonathan; Landman, Matthew P.; Leys, Charles M.; Mak, Grace Z.; Ostlie, Daniel J.; Raque, Jessica; Rymeski, Beth; Saito, Jacqueline M.; St. Peter, Shawn D.; von Allmen, Daniel; Warner, Brad W.; Sato, Thomas T.; Surgery, School of Medicine
    Purpose Right sided aortic arch (RAA) is a rare anatomic finding in infants with esophageal atresia with or without tracheoesophageal fistula (EA/TEF). In the presence of RAA, significant controversy exists regarding optimal side for thoracotomy in repair of the EA/TEF. The purpose of this study was to characterize the incidence, demographics, surgical approach, and outcomes of patients with RAA and EA/TEF. Methods A multi-institutional, IRB approved, retrospective cohort study of infants with EA/TEF treated at 11 children's hospitals in the United States over a 5-year period (2009 to 2014) was performed. All patients had a minimum of one-year follow-up. Results In a cohort of 396 infants with esophageal atresia, 20 (5%) had RAA, with 18 having EA with a distal TEF and 2 with pure EA. Compared to infants with left sided arch (LAA), RAA infants had a lower median birth weight, (1.96 kg (IQR 1.54–2.65) vs. 2.57 kg (2.00–3.03), p = 0.01), earlier gestational age (34.5 weeks (IQR 32–37) vs. 37 weeks (35–39), p = 0.01), and a higher incidence of congenital heart disease (90% vs. 32%, p < 0.0001). The most common cardiac lesions in the RAA group were ventricular septal defect (7), tetralogy of Fallot (7) and vascular ring (5). Seventeen infants with RAA underwent successful EA repair, 12 (71%) via right thoracotomy and 5 (29%) through left thoracotomy. Anastomotic strictures trended toward a difference in RAA patients undergoing right thoracotomy for primary repair of their EA/TEF compared to left thoracotomy (50% vs. 0%, p = 0.1). Side of thoracotomy in RAA patients undergoing EA/TEF repair was not significantly associated with mortality, anastomotic leak, recurrent laryngeal nerve injury, recurrent fistula, or esophageal dehiscence (all p > 0.29). Conclusion RAA in infants with EA/TEF is rare with an incidence of 5%. Compared to infants with EA/TEF and LAA, infants with EA/TEF and RAA are more severely ill with lower birth weight and higher rates of prematurity and complex congenital heart disease. In neonates with RAA, surgical repair of the EA/TEF is technically feasible via thoracotomy from either chest. A higher incidence of anastomotic strictures may occur with a right-sided approach.
  • Thumbnail Image
    Item
    Initial Laparotomy Versus Peritoneal Drainage in Extremely Low Birthweight Infants With Surgical Necrotizing Enterocolitis or Isolated Intestinal Perforation: A Multicenter Randomized Clinical Trial
    (Wolters Kluwer, 2021) Blakely, Martin L.; Tyson, Jon E.; Lally, Kevin P.; Hintz, Susan R.; Eggleston, Barry; Stevenson, David K.; Besner, Gail E.; Das, Abhik; Ohls, Robin K.; Truog, William E.; Nelin, Leif D.; Poindexter, Brenda B.; Pedroza, Claudia; Walsh, Michele C.; Stoll, Barbara J.; Geller, Rachel; Kennedy, Kathleen A.; Dimmitt, Reed A.; Carlo, Waldemar A.; Cotten, C. Michael; Laptook, Abbot R.; Van Meurs, Krisa P.; Calkins, Kara L.; Sokol, Gregory M.; Sanchez, Pablo J.; Wyckoff, Myra H.; Patel, Ravi M.; Frantz, Ivan D., III.; Shankaran, Seetha; D'Angio, Carl T.; Yoder, Bradley A.; Bell, Edward F.; Watterberg, Kristi L.; Martin, Colin A.; Harmon, Carroll M.; Rice, Henry; Kurkchubasche, Arlet G.; Sylvester, Karl; Dunn, James C.Y.; Markel, Troy A.; Diesen, Diana L.; Bhatia, Amina M.; Flake, Alan; Chwals, Walter J.; Brown, Rebeccah; Bass, Kathryn D.; St. Peter, Shawn D.; Shanti, Christina M.; Pegoli, Walter, Jr.; Skarda, David; Shilyansky, Joel; Lemon, David G.; Mosquera, Ricardo A.; Peralta-Carcelen, Myriam; Goldstein, Ricki F.; Vohr, Betty R.; Purdy, Isabell B.; Hines, Abbey C.; Maitre, Nathalie L.; Heyne, Roy J.; DeMauro, Sara B.; McGowan, Elisabeth C.; Yolton, Kimberly; Kilbride, Howard W.; Natarajan, Girija; Yost, Kelley; Winter, Sarah; Colaizy, Tarah T.; Laughon, Matthew M.; Lakshminrusimha, Satyanarayana; Higgins, Rosemary D.; Eunice Kennedy Shriver National Institute of Child Health; Human Development Neonatal Research Network; Pediatrics, School of Medicine
    Objective: The aim of this study was to determine which initial surgical treatment results in the lowest rate of death or neurodevelopmental impairment (NDI) in premature infants with necrotizing enterocolitis (NEC) or isolated intestinal perforation (IP). Summary background data: The impact of initial laparotomy versus peritoneal drainage for NEC or IP on the rate of death or NDI in extremely low birth weight infants is unknown. Methods: We conducted the largest feasible randomized trial in 20 US centers, comparing initial laparotomy versus peritoneal drainage. The primary outcome was a composite of death or NDI at 18 to 22 months corrected age, analyzed using prespecified frequentist and Bayesian approaches. Results: Of 992 eligible infants, 310 were randomized and 96% had primary outcome assessed. Death or NDI occurred in 69% of infants in the laparotomy group versus 70% with drainage [adjusted relative risk (aRR) 1.0; 95% confidence interval (CI): 0.87-1.14]. A preplanned analysis identified an interaction between preoperative diagnosis and treatment group (P = 0.03). With a preoperative diagnosis of NEC, death or NDI occurred in 69% after laparotomy versus 85% with drainage (aRR 0.81; 95% CI: 0.64-1.04). The Bayesian posterior probability that laparotomy was beneficial (risk difference <0) for a preoperative diagnosis of NEC was 97%. For preoperative diagnosis of IP, death or NDI occurred in 69% after laparotomy versus 63% with drainage (aRR, 1.11; 95% CI: 0.95-1.31); Bayesian probability of benefit with laparotomy = 18%. Conclusions: There was no overall difference in death or NDI rates at 18 to 22 months corrected age between initial laparotomy versus drainage. However, the preoperative diagnosis of NEC or IP modified the impact of initial treatment.