In the patient's shoes: The impact of hospital proximity and volume on stage I endometrial cancer care patterns and outcomes.

OBJECTIVE: To compare the impact of travel burden and hospital volume on care patterns and outcomes in stage I endometrial cancer. METHODS: This retrospective cohort study identified patients from the National Cancer Database with stage I epithelial endometrial carcinoma who underwent hysterectomy between 2012 and 2020. Patients were categorized into: lowest quartiles of travel distance and hospital surgical volume for endometrial cancer (Local) and highest quartiles of distance and volume (Travel). Primary outcome was overall survival. Secondary outcomes were surgery route, lymph node (LN) assessment method, length of stay (LOS), 30-day readmission, and 30- and 90-day mortality. Results were stratified by tumor recurrence risk. Outcomes were compared using propensity-score matching. Propensity-adjusted survival was evaluated using Kaplan-Meier curves and compared using log-rank tests. Cox models estimated hazard ratios for death. Sensitivity analysis using modified Poisson regressions was performed. RESULTS: Among 36,514 patients, 51.4% were Local and 48.6% Travel. The two cohorts differed significantly in demographics and clinicopathologic characteristics. Upon propensity-score matching (p < 0.05 for all), more Travel patients underwent minimally invasive surgery (88.1%vs79.1%) with fewer conversions to laparotomy (2.0%vs2.6%), more sentinel (20.5%vs11.3%) and fewer traditional LN assessments (58.1vs61.7%) versus Local. Travel patients had longer intervals to surgery (≥30 days:56.7%vs50.1%) but shorter LOS (<2 days:76.9%vs59.8%), fewer readmissions (1.9%vs2.7%%), and comparable 30- and 90-day mortality. OS and HR for death remained comparable between the matched groups. CONCLUSIONS: Compared to surgery in nearby low-volume hospitals, patients with stage I epithelial endometrial cancer who travelled longer distances to high-volume centers experienced more favorable short-term outcomes and care patterns with comparable long-term survival.

Shifting trends and sicker patients: Reassessing hysterectomy performed for benign indications by gynecologic oncologists.

OBJECTIVE: To assess trends and differences in patient characteristics, complications, and distributions of hysterectomy for benign indications by benign gynecologists (BG) and gynecologic oncologists (GO). METHODS: This retrospective cohort study identified patients undergoing hysterectomy for benign indications using the National Surgical Quality Improvement Program data from 2014 to 2021. Exclusions were made for gynecologic or disseminated cancers, ascites, non-gynecologic surgeons, and cesarean hysterectomies. Primary outcome was major (≥Grade 3) 30-day complications, categorized into any complications, wound, cardiovascular and pulmonary, renal, infectious, andthromboembolic complications. Thirty-day readmissions, reoperations, and mortality were also analyzed. Propensity score matching was performed in a 1:1 match of GO to BG patients and was compared. Linear regressions assessed trends. RESULTS: Among 198,767 patients, 18% (n = 37,707) underwent hysterectomy for benign indications with GO. GO patients exhibited more risk factors for complications and differed significantly from BG patients in comorbidities and perioperative characteristics. Overall, GO patients had higher major complication rates (3.1% vs 2.2%, p < 0.001) and for several other composite complications. After matching, compared to BG, GO-performed hysterectomies had similar rates of major complications (3.0% vs 3.0%, p = 0.55) and no differences in other composite complications, except fewer reoperations (1.2 % vs 1.5%, p < 0.01) and wound complications (0.4% vs 0.5%, p = 0.02) in GO patients. Over the eight years, the percentage of GO-performed hysterectomy (ß = 0.41, R2 = 0.71,p < 0.01) increased significantly whereas BG-performed surgeries decreased by the same magnitude. BG had a significant decrease in frail patients (ß = -0.47, R2 = 0.90, p < 0.01), but GO did not (ß = -0.36, R2 = 0.38, p = 0.10). CONCLUSIONS: GO are performing more hysterectomies for benign indications on higher-risk patients. However, on a matched cohort, risks of major complications were similar between GO and BG.

The activity advantage: Objective measurement of preoperative activity is associated with postoperative recovery and outcomes in patients undergoing surgery with gynecologic oncologists.

OBJECTIVE: To examine the association between objectively-measured preoperative physical activity with postoperative outcomes and recovery milestones in patients undergoing gynecologic oncology surgeries. METHODS: Prospective cohort study of patients undergoing surgery with gynecologic oncologists who wore wearable actigraphy rings before and after surgery from 03/2021-11/2023. Exposures encompassed preoperative activity intensity (moderate- and vigorous-intensity metabolic equivalent of task-minutes [MAVI MET-mins] over seven days) and level (average daily steps over seven days). Intensity was categorized as <500, 500-1000, and >1000 MAVI MET-mins; level categorized as <8000 and ≥8000 steps/day. Primary outcome was 30-day complications. Secondary outcomes included reaching postoperative goal (≥70% of recommended preoperative intensity and level thresholds) and return to baseline (≥70% of individual preoperative intensity and level). RESULTS: Among 96 enrolled, 87 met inclusion criteria, which constituted 39% (n = 34) with <500 MET-mins and 56.3% (n = 49) with <8000 steps preoperatively. Those with <500 MET-mins and <8000 steps had higher ECOG scores (p = 0.042 & 0.037) and BMI (p = 0.049 & 0.002) vs those with higher activity; all other perioperative characteristics were similar between groups. Overall, 29.9% experienced a 30-day complication, 29.9% reached postoperative goal, and 64.4% returned to baseline. On multivariable models, higher activity was associated with lower odds of complications: 500-1000 MET-mins (OR = 0.26,95%CI = 0.07-0.92) and >1000 MET-mins (OR = 0.25,95%CI = 0.07-0.94) vs <500 MET-mins; ≥8000 steps (OR = 0.25,95%CI = 0.08-0.73) vs <8000 steps. Higher preoperative activity was associated fewer days to reach postoperative goal. CONCLUSION: Patients with high preoperative activity are associated with fewer postoperative complications and faster attainment of recovery milestones. Physical activity may be considered a modifiable risk factor for adverse postoperative outcomes.

Increasing physical activity among older adults with gynecologic cancers: a qualitative study.

PURPOSE: The purpose of this study was to gain an understanding of older gynecologic cancer patients' preferences and opinions related to physical activity during chemotherapy, including interventions to promote physical activity. METHODS: Gynecologic cancer patients 60 years or older receiving chemotherapy at a single institution within the last 12 months completed questionnaires and a semi-structured interview asking about their preferences for physical activity interventions aimed at promoting physical activity while receiving treatment. RESULTS: Among the 30 gynecologic cancer patients surveyed and interviewed, a majority agreed with the potential usefulness of a physical activity intervention during chemotherapy (67%) and most reported they would be willing to use an activity tracker during chemotherapy (73%). They expressed a preference for an aerobic activity intervention such as walking, indicated a desire for education from their clinical team on the effects physical activity can have on treatment symptoms, and stated a need for an intervention that could be accessed from anywhere and anytime. Additionally, they emphasized a need for an intervention that considered their treatment symptoms as these were a significant barrier to physical activity while on chemotherapy. CONCLUSION: In this study of older gynecologic cancer patients receiving chemotherapy, most were open to participating in a virtually accessible and symptom-tailored physical activity intervention to promote physical activity during chemotherapy.

Low serum creatinine levels are associated with major post-operative complications in patients undergoing surgery with gynecologic oncologists.

OBJECTIVE: Serum creatinine is a byproduct of muscle metabolism, and low creatinine is postulated to be associated with diminished muscle mass. This study examined the association between low pre-operative serum creatinine and post-operative outcomes. METHODS: This retrospective cohort study utilized the 2014-2021 National Surgical Quality Improvement Program to identify patients undergoing surgery with gynecologic oncologists. Patients with missing pre-operative creatinine, end-stage renal disease, sepsis, septic shock, dialysis, or pregnancy were excluded. Pre-operative creatinine was categorized into markedly low (≤0.44 mg/dL), mildly low (0.45-0.64 mg/dL), normal (0.65-0.84 mg/dL), and four categories of elevated levels (0.85-1.04, 1.05-1.24, 1.25-1.44, and ≥1.45 mg/dL). Outcomes included major (≥Grade 3) 30-day complications, categorized into any complications, wound, cardiovascular and pulmonary, renal, infectious, and thromboembolic complications. Also examined were 30-day readmissions, reoperations, and mortality. Logistic regressions assessed the association between creatinine and complications, with stratification by albumin and sensitivity analysis with propensity score matching. RESULTS: Among 84 786 patients, 0.8% had markedly low, 19.6% mildly low, and 50.2% normal creatinine; the remainder had elevated creatinine. As creatinine decreased, the risks of major complications increased in a dose-dependent manner on univariable and multivariable analyses. A total of 9.6% (n=63) markedly low patients experienced major complications, second to creatinine ≥1.45 mg/dL (9.9%, n=141). On multivariable models, both markedly and mildly low creatinine were associated with higher odds of major complications (OR 1.715, 95% CI 1.299 to 2.264 and OR 1.093, 95% CI 1.001 to 1.193) and infections (OR 1.575, 95% CI 1.118 to 2.218 and OR 1.165, 95% CI 1.048 to 1.296) versus normal. Markedly low creatinine had similar ORs to creatinine ≥1.45 mg/dL and was further associated with higher odds of cardiovascular and pulmonary complications (OR 2.301, 95% CI 1.300 to 4.071), readmissions (OR 1.403, 95% CI 1.045 to 1.884), and mortality (OR 2.718, 95% CI 1.050 to 7.031). After albumin stratification, associations persisted for markedly low creatinine. Propensity-weighted analyses demonstrated congruent findings. CONCLUSIONS: Low creatinine levels are associated with major post-operative complications in gynecologic oncology in a dose-dependent manner. Low creatinine can offer useful information for pre-operative risk stratification, surgical counseling, and peri-operative management.

Use of topic modeling to assess research trends in the journal Gynecologic Oncology.

STUDY OBJECTIVE: There is scant research identifying thematic trends within medical research. This work may provide insight into how a given field values certain topics. We assessed the feasibility of using a machine learning approach to determine the most common research themes published in Gynecologic Oncology over a thirty-year period and to subsequently evaluate how interest in these topics changed over time. METHODS: We retrieved the abstracts of all original research published in Gynecologic Oncology from 1990 to 2020 using PubMed. Abstract text was processed through a natural language processing algorithm and clustered into topical themes using latent Dirichlet allocation (LDA) prior to manual labeling. Topics were investigated for temporal trends. RESULTS: We retrieved 12,586 original research articles, of which 11,217 were evaluable for subsequent analysis. Twenty-three research topics were selected at the completion of topic modeling. The topics of basic science genetics, epidemiologic methods, and chemotherapy experienced the greatest increase over the time period, while postoperative outcomes, reproductive age cancer management, and cervical dysplasia experienced the greatest decline. Interest in basic science research remained relatively constant. Topics were additionally reviewed for words indicative of either surgical or medical therapy. Both surgical and medical topics saw increasing interest, with surgical topics experiencing a greater increase and representing a higher proportion of published topics. CONCLUSIONS: Topic modeling, a type of unsupervised machine learning, was successfully used to identify trends in research themes. The application of this technique provided insight into how the field of gynecologic oncology values the components of its scope of practice and therefore how it may choose to allocate grant funding, disseminate research, and participate in the public discourse.

Postoperative complications in women with ovarian cancer stratified by cytoreductive surgery outcome.

OBJECTIVE: To compare 30-day postoperative complications for patients with advanced ovarian cancer who underwent resection to no gross residual disease versus optimal and suboptimal cytoreduction. METHODS: A retrospective cohort study of women drawn from the National Surgical Quality Improvement Program who underwent cytoreductive surgery for advanced ovarian cancer between 2014 and 2019 was performed. Exposure of interest was extent of surgical resection defined as no gross residual disease; residual disease <1 cm (optimal); and residual disease >1 cm (suboptimal). Primary outcome was postoperative complication. Associations were examined with bivariable tests and multivariable logistic regression. RESULTS: A total of 2248 women underwent cytoreductive surgery; 68.4% (n = 1538) underwent resection to no gross residual disease, 22.4% (n = 504) had an optimal, and 9.2% (n = 206) had a suboptimal cytoreduction. Optimal cytoreduction patients had the highest rates of any postoperative complication (35.5%, p < 0.001). They also had the longest operative times and procedures that were most surgically complex (203 min, 43.6 relative value units, both p < 0.05). However, patients who underwent optimal cytoreduction did not have increased odds of major complications (adjusted odds ratio: 1.20, 95% confidence interval: 0.91-1.58). CONCLUSION: Patients who underwent optimal cytoreduction had more postoperative complications, required the most operating room time, and represented more complex surgeries compared with suboptimal cytoreduction or resection to no gross residual disease.

Characterization of pre-operative anemia in patients undergoing surgery by a gynecologic oncologist and association with post-operative complications.

OBJECTIVE: Anemia is prevalent in patients with gynecologic cancers and is associated with increased peri-operative morbidity. We aimed to characterize risk factors for pre-operative anemia and describe outcomes among patients undergoing surgery by a gynecologic oncologist to identify potential areas for impactful intervention. METHODS: We analyzed major surgical cases performed by a gynecologic oncologist in the National Surgical Quality Improvement Program (NSQIP) database from 2014 to 2019. Anemia was defined as hematocrit <36%. Demographic characteristics and peri-operative variables for patients with and without anemia were compared using bivariable tests. Odds of peri-operative complications in patients stratified by pre-operative anemia were calculated using logistic regression models. RESULTS: Among 60 017 patients undergoing surgery by a gynecologic oncologist, 23.1% had pre-operative anemia. Women with ovarian cancer had the highest rate of pre-operative anemia at 39.7%. Patients with advanced-stage cancer had a higher risk of anemia than early-stage disease (42.0% vs 16.3%, p≤0.001). In a logistic regression model adjusting for potential demographic, cancer-related, and surgical confounders, patients with pre-operative anemia had increased odds of infectious complications (odds ratio (OR) 1.16, 95% CI 1.07 to 1.26), thromboembolic complications (OR 1.39, 95% CI 1.15 to 1.68), and blood transfusion (OR 5.78, 95% CI 5.34 to 6.26). CONCLUSIONS: There is a high rate of anemia in patients undergoing surgery by a gynecologic oncologist, particularly those with ovarian cancer and/or advanced malignancy. Pre-operative anemia is associated with increased odds of peri-operative complications. Interventions designed to screen for and treat anemia in this population have the potential for significant impact on surgical outcomes.

Enrollment of Racial and Ethnic Minoritized Groups in Gynecologic Oncology Clinical Trials: A Review of the Scope of the Problem, Contributing Factors, and Strategies to Improve Inclusion.

Racial inequities are well-documented across the gynecologic oncology care continuum, including the representation of racial and ethnic minoritized groups (REMGs) in gynecologic oncology clinical trials. We specifically reviewed the scope of REMG disparities, contributing factors, and strategies to improve inclusion. We found systematic and progressively worsening under-enrollment of REMGs, particularly of Black and Latinx populations. In addition, race/ethnicity data reporting is poor, yet a prerequisite for accountability to recruitment goals. Trial participation barriers are multifactorial, and successful remediation likely requires multi-level strategies. More rigorous, transparent data on trial participants and effectiveness studies on REMG recruitment strategies are needed to improve enrollment.

Timing and duration of bevacizumab treatment and survival in patients with recurrent ovarian, fallopian tube, and peritoneal cancer: a multi-institution study.

Bevacizumab has demonstrated significant benefit in recurrent ovarian, fallopian tube and peritoneal cancer (OC), but its optimal position within the sequence of systemic therapies remains controversial. Since rebound progression after bevacizumab has been observed in other cancers, and because bevacizumab is incorporated in several regimens used in the recurrent setting, the duration of treatment may impact survival. We sought to identify whether earlier bevacizumab exposure is associated with prolonged bevacizumab therapy and survival by conducting a multi-institution retrospective study of recurrent OC patients treated with bevacizumab from 2004-2014. Multivariate logistic regression identified factors associated with receiving more than six bevacizumab cycles. Overall survival by duration and ordinal sequence of bevacizumab therapy were evaluated using logrank testing and Cox regression. In total, 318 patients were identified. 89.1% had stage III or IV disease; 36% had primary platinum resistance; 40.5% received two or fewer prior chemotherapy regimens. Multivariate logistic regression demonstrated that primary platinum sensitivity (Odds Ratio (OR) 2.34, p = 0.001) or initiating bevacizumab at the first or second recurrence (OR 2.73, p < 0.001) were independently associated with receiving more than six cycles of bevacizumab. Receiving more cycles of bevacizumab was associated with improved overall survival whether measured from time of diagnosis (logrank p < 0.001), bevacizumab initiation (logrank p < 0.001), or bevacizumab discontinuation (logrank p = 0.017). Waiting one additional recurrence to initiate bevacizumab resulted in a 27% increased hazard of death (Hazard Ratio (HR) 1.27, p < 0.001) by multivariate analysis. In conclusion, patients with primary platinum sensitive disease who received fewer prior lines of chemotherapy were able to receive more cycles of bevacizumab, which was associated with improved overall survival. Survival worsened when bevacizumab was initiated later in the ordinal sequence of therapies.

Sleep and gynecological cancer outcomes: opportunities to improve quality of life and survival.

Sleep is important for immune function, metabolic function and physical repair. Sleep is more commonly disrupted in women compared with men and is disrupted by surgery, chemotherapy, and cancer itself, making gynecological oncology patients at higher risk of insomnia and sleep disruption. Insomnia and sleep disruption are linked to increased pain, poorer quality of life, depression, and anxiety which can all negatively affect patient outcomes. A number of environmental, behavioral, and pharmacological interventions have been investigated to improve patient sleep and aid in the recovery process. It is vital to understand and address patient sleep quality in order to give patients the highest quality care and improve outcomes.

Association between cystoscopy at the time of hysterectomy performed by a gynecologic oncologist and delayed urinary tract injury.

OBJECTIVE: Guidance regarding the use of cystoscopy at the time of hysterectomy is lacking in gynecologic oncology. We compare the rate of delayed urinary tract injury in women who underwent cystoscopy at the time of hysterectomy performed by a gynecologic oncologist for benign or malignant indication with those who did not. METHODS: This was a retrospective cohort study of patients who had a hysterectomy performed by a gynecologic oncologist recorded in the National Surgical Quality Improvement Program between January 2014 and December 2017. The primary outcome was delayed urinary tract injury in the 30-day post-operative period. Secondary outcomes were operative time and urinary tract infection rate. The exposure of interest was cystoscopy at the time of hysterectomy and bivariable tests were used to examine associations. RESULTS: We identified 33 355 women who underwent hysterectomy for benign (41%; n=13 621) or malignant (59%; n=19 734) indications performed by a gynecologic oncologist. Surgical approach was open (39%; n=12 974), laparoscopic or robotic-assisted laparoscopic (55%; n=18 272), and vaginal or vaginally-assisted (6%; n=2109). Overall, 12% of women (n=3873) underwent cystoscopy at the time of surgery; cystoscopy was more commonly performed in laparoscopic (15%; n=2829) and vaginal (12%; n=243) approaches than with open hysterectomy (6%; n=801) (p<0.001). There was no difference in the rate of delayed urinary tract injury in patients who underwent cystoscopy at the time of surgery compared with those who did not (0.4% vs 0.3%, p=0.32). However, patients who underwent cystoscopy were more likely to be diagnosed with a urinary tract infection (3% vs 2%, RR 1.3, 95% CI 1.1 to 1.6). In cases where cystoscopy was performed, median operative time was increased by 9 min (137 vs 128 min, p<0.001). CONCLUSION: Cystoscopy at the time of hysterectomy performed by a gynecologic oncologist does not result in a lower rate of delayed urinary tract injury compared with no cystoscopy.

Survival and Surgical Approach among Women with Advanced Ovarian Cancer Treated with Neoadjuvant Chemotherapy.

STUDY OBJECTIVE: To evaluate the effect of surgical approach on overall survival (OS) for women with advanced, epithelial ovarian cancer (EOC) after neoadjuvant chemotherapy (NACT) and determine the sociodemographic and clinical factors associated with surgical approach. DESIGN: The primary exposure was surgical approach to interval cytoreduction, minimally invasive versus open, and was evaluated by intention to treat. Primary outcome was OS. Associations were examined using Chi-squared tests, Wilcoxon rank sum tests, and multivariate logistic regression. Survival analysis was performed with Kaplan-Meier methods and Cox proportional hazards. SETTING: The National Cander Database was used to identify eligible patients. PATIENTS: Women diagnosed with stage IIIC/IV EOC from 2010-2016. INTERVENTIONS: Patients were included if they were treated with NACT within 90 days of diagnosis before interval cytoreductive surgery (CRS). MEASUREMENTS AND MAIN RESULTS: A total of 8085 women were identified; 6713 (83%) underwent open interval CRS, and 1372 (17%) underwent minimally invasive interval CRS. The proportion undergoing minimally invasive CRS after NACT increased from 2% in 2010 to 11% in 2016, a nearly 6-fold increase. There was no difference in OS between women who underwent minimally invasive and open interval CRS (median OS 36.5 vs 35.2 months, HR 0.94, 95% CI, 0.86-1.04). After adjusting for demographic and clinical variables, including age, race, ethnicity, income, and Charlson/Deyo score, no difference in OS was observed (HR 0.95, 95% CI, 0.86-1.04). Women of older age (OR 1.35, 95% CI, 1.05-1.74) and Hispanic ethnicity (OR 1.46, 95% CI, 1.14-1.88) had increased odds of receiving minimally invasive CRS after NACT, whereas low income (<$38000/year) women had decreased odds (OR 0.76, 95% CI, 0.60-0.97, p = .03). Length of stay differed for patients undergoing minimally invasive versus open interval CRS (3 vs 5 days, p <.01), but there was no difference in need for postoperative readmission. CONCLUSIONS: Minimally invasive CRS has similar survival outcomes to open CRS among women with EOC who have undergone NACT.

The Invisible Hand of Industry.

Over the last decades, federal funding for medical research has decreased, while industry funding has increased. The majority of clinical trials are now industry funded. Involvement of industry raises documented concerns of reporting and publication bias, data suppression, and conclusions that may more favorably align with funder motivations rather than study results. However, industry involvement may also lead to scientific innovation, efficiency, and a more rapid timeline to bring new developments to patients. Through a careful review of a manuscript, the reader can understand the nature of industry involvement and interpret the results in this context.

Survival after Minimally Invasive Radical Hysterectomy for Early-Stage Cervical Cancer.

BACKGROUND: Minimally invasive surgery was adopted as an alternative to laparotomy (open surgery) for radical hysterectomy in patients with early-stage cervical cancer before high-quality evidence regarding its effect on survival was available. We sought to determine the effect of minimally invasive surgery on all-cause mortality among women undergoing radical hysterectomy for cervical cancer. METHODS: We performed a cohort study involving women who underwent radical hysterectomy for stage IA2 or IB1 cervical cancer during the 2010-2013 period at Commission on Cancer-accredited hospitals in the United States. The study used inverse probability of treatment propensity-score weighting. We also conducted an interrupted time-series analysis involving women who underwent radical hysterectomy for cervical cancer during the 2000-2010 period, using the Surveillance, Epidemiology, and End Results program database. RESULTS: In the primary analysis, 1225 of 2461 women (49.8%) underwent minimally invasive surgery. Women treated with minimally invasive surgery were more often white, privately insured, and from ZIP Codes with higher socioeconomic status, had smaller, lower-grade tumors, and were more likely to have received a diagnosis later in the study period than women who underwent open surgery. Over a median follow-up of 45 months, the 4-year mortality was 9.1% among women who underwent minimally invasive surgery and 5.3% among those who underwent open surgery (hazard ratio, 1.65; 95% confidence interval [CI], 1.22 to 2.22; P=0.002 by the log-rank test). Before the adoption of minimally invasive radical hysterectomy (i.e., in the 2000-2006 period), the 4-year relative survival rate among women who underwent radical hysterectomy for cervical cancer remained stable (annual percentage change, 0.3%; 95% CI, -0.1 to 0.6). The adoption of minimally invasive surgery coincided with a decline in the 4-year relative survival rate of 0.8% (95% CI, 0.3 to 1.4) per year after 2006 (P=0.01 for change of trend). CONCLUSIONS: In an epidemiologic study, minimally invasive radical hysterectomy was associated with shorter overall survival than open surgery among women with stage IA2 or IB1 cervical carcinoma. (Funded by the National Cancer Institute and others.).

Natural language processing with machine learning to predict outcomes after ovarian cancer surgery.

OBJECTIVE: To determine if natural language processing (NLP) with machine learning of unstructured full text documents (a preoperative CT scan) improves the ability to predict postoperative complication and hospital readmission among women with ovarian cancer undergoing surgery when compared with discrete data predictors alone. METHODS: Medical records from two institutions were queried to identify women with ovarian cancer and available preoperative CT scan reports who underwent debulking surgery. Machine learning methods using both discrete data predictors (age, comorbidities, preoperative laboratory values) and natural language processing of full text reports (preoperative CT scans) were used to predict postoperative complication and hospital readmission within 30 days of surgery. Discrimination was measured using the area under the receiver operating characteristic curve (AUC). RESULTS: We identified 291 women who underwent debulking surgery for ovarian cancer. Mean age was 59, mean preoperative CA125 value was 610 U/ml and albumin was 3.9 g/dl. There were 25 patients (8.6%) who were readmitted and 45 patients (15.5%) who developed postoperative complications within 30 days. Using discrete features alone, we were able to predict postoperative readmission with an AUC of 0.56 (0.54-0.58, 95% CI); this improved to 0.70 (0.68-0.73, 95% CI) (p < 0.001) with the addition of NLP of preoperative CT scans. CONCLUSIONS: Natural language processing with machine learning improved the ability to predict postoperative complication and hospital readmission among women with ovarian cancer undergoing surgery.

Discrepancies between author- and industry-reported disclosures of financial relationships at an annual gynecologic oncology research meeting.

OBJECTIVE: Trillions of dollars pass to physicians from industry-related businesses annually, leading to many opportunities for financial conflicts of interest. The Open Payments Database (OPD) was created to ensure transparency. We describe the industry relationships as reported in the OPD for presenters at the 2019 Society of Gynecologic Oncology (SGO) Annual Meeting and evaluate concordance between author disclosures of their financial interests and information provided by the OPD. METHODS: This is an observational, cross-sectional study. Disclosure data were collected from authors with oral and featured abstract presentations in the 2019 SGO annual conference. These disclosures were compared to data available for each author in the 2018 OPD, which included the amount and nature of industry payments. RESULTS: We examined the disclosures of 301 authors who met inclusion criteria. Of 161 authors who had disclosure statements on their presentations,147 reported "no disclosures," and 14 disclosed industry relationships. The remaining 140 did not list any disclosure information. Sixty percent (184/301) of authors had industry relationships in the 2018 OPD, including 173 of 287 (60.3%) of authors who either reported no disclosures or did not have disclosure data available in their presentations. These transactions totaled over 43 million USD from 122 different companies, with most payments (46%) categorized as "Research or Associated Research." Accurate disclosure reporting was associated with receiving higher payments or research payments, and being a presenting author. CONCLUSIONS: Most authors at the SGO annual conference did not correctly disclose their industry relationships when compared with their entries in the OPD.

Utilization and Treatment Patterns of Cytoreduction Surgery and Intraperitoneal Chemotherapy in the United States.

INTRODUCTION: Cytoreductive surgery (CRS) and intraperitoneal chemotherapy (IPC) is an effective treatment option for selected patients with peritoneal metastases (PM), but national utilization patterns are poorly understood. The objectives of this study were to (1) describe population-based trends in national utilization of CRS/IPC; (2) define the most common indications for the procedure; and (3) characterize the types of hospitals performing the procedure. METHODS: The National Inpatient Sample (NIS) was used to identify patients from 2006 to 2015 who underwent CRS/IPC, and to calculate national estimates of procedural frequency and oncologic indication. Hospitals performing CRS/IPC were classified based on size and teaching status. RESULTS: The estimated annual number of CRS/IPC cases increased significantly from 189 to 1540 (p < 0.001). Overall, appendiceal cancer was the most common indication (25.7%), followed by ovarian cancer (23.3%), colorectal cancer (22.5%), and unspecified PM (15.0%). Remaining cases (13.5%) were performed for other indications. Most cases were performed in large teaching hospitals (65.9%), compared with smaller teaching hospitals (25.1%), large non-teaching hospitals (5.3%), or small non-teaching hospitals (3.2%). Patients were more likely to undergo CRS/IPC without a diagnosis based on level I evidence (appendiceal, ovarian, or colorectal) at large non-academic hospitals (odds ratio 2.00, 95% confidence interval 1.18-3.38, p = 0.010) compared with large academic hospitals. CONCLUSIONS: Utilization of CRS/IPC is increasing steadily in the US, is performed at many types of facilities, and often for a variety of indications that are not supported by high-level evidence. Given associated morbidity of CRS/IPC, a national registry dedicated to cases of IPC is necessary to further evaluate use and outcomes.

Minimally Invasive Surgery Rate as a Quality Metric for Endometrial Cancer.

STUDY OBJECTIVE: To determine the frequency with which Commission on Cancer-accredited hospitals met a metric of ≥80% minimally invasively performed hysterectomies for endometrial cancer and to compare the clinical outcomes of hospitals meeting this metric with those that did not. DESIGN: Retrospective cohort study. SETTING: Hospitals caring for ≥20 endometrial cancer patients per year recorded in the National Cancer Database in 2015 were included. PATIENTS: Women who had undergone hysterectomy for endometrial cancer and had an epithelial histology, a Charlson comorbidity score of 0, and stage I to III disease. INTERVENTION: Patient characteristics, patterns of care, and outcomes were compared between hospitals performing ≥80% minimally invasive hysterectomies and hospitals not meeting this metric. MEASUREMENTS AND MAIN RESULTS: The hospitals (n = 510) treated 20 670 women with endometrial cancer. In 283 (55%) hospitals ≥80% of hysterectomies were minimally invasively performed (high-minimally invasive surgery [MIS] hospitals, overall MIS rate 89%). In the 227 hospitals that did not meet this metric, 61% of hysterectomies for endometrial cancer were performed using a minimally invasive approach. In high-MIS hospitals, patients were more likely to be white (87% vs 82%, p<.001), privately insured (53% vs 49%, p <.001), and have stage I disease (84% vs 82%, p = .002) and an endometrioid histology (79% vs 76%, p <.001). Surgery was more often performed robotically (80% vs 71%), and conversion to laparotomy was less likely (1.5% vs 3.2%, adjusted odds ratio [aOR], 0.47; 95% confidence interval [CI], 0.39-0.57) (both p <.001). Patients treated at high-MIS hospitals were more likely to have undergone lymph node assessment at the time of surgery (76% vs 69%; aOR, 1.43; 95% CI, 1.35-1.53) and been discharged on the same or next day (74% vs 57%; aOR, 2.27; 95% CI, 2.13-2.42) and were less likely to have an unplanned 30-day readmission (1.8% vs 2.9%; aOR, 0.64; 95% CI, 0.53-0.77). CONCLUSION: An MIS rate of ≥80% for endometrial cancer is feasible on a national scale and is associated with other hospital-level measurements of high-quality care.

How Can Pelvic MRI with Diffusion-Weighted Imaging Help My Pregnant Patient?

The purpose of this review is to explain how diffusion-weighted imaging (DWI) is used during magnetic resonance imaging (MRI) exams in pregnant patients for specific maternal indications, including evaluation of acute pelvic pain, adnexal masses, cancer diagnosis and staging, and morbidly adherent placenta. While ultrasound is often the appropriate initial imaging for evaluating a pregnant patient, MRI can be helpful when a pelvic ultrasound is indeterminate. MRI has advantages in that it does not use ionizing radiation and has shown no known deleterious effects to the fetus. The use of gadolinium-based contrast is controversial during pregnancy. DWI is a functional sequence performed during an MRI exam, which is valuable in the absence of gadolinium contrast, and can increase the visibility of inflammation, abscesses, and tumors. Case examples will be presented to demonstrate the utility and added value of DWI over conventional anatomic T1- and T2-weighted imaging in diagnosis of maternal disease in the pregnant patient's pelvis.