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  1. Article: Characterization and Valuation of the Uncertainty of Calibrated Parameters in Microsimulation Decision Models.

    Alarid-Escudero, Fernando / Knudsen, Amy B / Ozik, Jonathan / Collier, Nicholson / Kuntz, Karen M

    Frontiers in physiology

    2022  Volume 13, Page(s) 780917

    Abstract: Background: ...

    Abstract Background:
    Language English
    Publishing date 2022-05-09
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2564217-0
    ISSN 1664-042X
    ISSN 1664-042X
    DOI 10.3389/fphys.2022.780917
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Estimated US Cancer Deaths Prevented With Increased Use of Lung, Colorectal, Breast, and Cervical Cancer Screening.

    Knudsen, Amy B / Trentham-Dietz, Amy / Kim, Jane J / Mandelblatt, Jeanne S / Meza, Rafael / Zauber, Ann G / Castle, Philip E / Feuer, Eric J

    JAMA network open

    2023  Volume 6, Issue 11, Page(s) e2344698

    Abstract: Importance: Increased use of recommended screening could help achieve the Cancer Moonshot goal of reducing US cancer deaths.: Objective: To estimate the number of cancer deaths that could be prevented with a 10-percentage point increase in the use of ...

    Abstract Importance: Increased use of recommended screening could help achieve the Cancer Moonshot goal of reducing US cancer deaths.
    Objective: To estimate the number of cancer deaths that could be prevented with a 10-percentage point increase in the use of US Preventive Services Task Force (USPSTF)-recommended screening.
    Design, setting, and participants: This decision analytical model study is an extension of previous studies conducted for the USPSTF from 2018 to 2023. This study simulated contemporary cohorts of US adults eligible for lung, colorectal, breast, and cervical cancer screening.
    Exposures: Annual low-dose computed lung tomography among eligible adults aged 50 to 80 years; colonoscopy every 10 years among adults aged 45 to 75 years; biennial mammography among female adults aged 40 to 74 years; and triennial cervical cytology screening among female adults aged 21 to 29 years, followed by human papillomavirus testing every 5 years from ages 30 to 65 years.
    Main outcomes and measures: Estimated number of cancer deaths prevented with a 10-percentage point increase in screening use, assuming screening commences at the USPSTF-recommended starting age and continues throughout the lifetime. Outcomes were presented 2 ways: (1) per 100 000 and (2) among US adults in 2021; and they were expressed among the target population at the age of screening initiation. For lung cancer, estimates were among those who will also meet the smoking eligibility criteria during their lifetime. Harms from increased uptake were also reported.
    Results: A 10-percentage point increase in screening use at the age that USPSTF recommended screening commences was estimated to prevent 226 lung cancer deaths (range across models within the cancer site, 133-332 deaths), 283 (range, 263-313) colorectal cancer deaths, 82 (range, 61-106) breast cancer deaths, and 81 (1 model; no range available) cervical cancer deaths over the lifetimes of 100 000 persons eligible for screening. These rates corresponded with an estimated 1010 (range, 590-1480) lung cancer deaths prevented, 11 070 (range, 10 280-12 250) colorectal cancer deaths prevented, 1790 (range, 1330-2310) breast cancer deaths prevented, and 1710 (no range available) cervical cancer deaths prevented over the lifetimes of eligible US residents at the recommended age to initiate screening in 2021. Increased uptake was also estimated to generate harms, including 100 000 (range, 45 000-159 000) false-positive lung scans, 6000 (range, 6000-7000) colonoscopy complications, 300 000 (range, 295 000-302 000) false-positive mammograms, and 348 000 (no range available) colposcopies over the lifetime.
    Conclusions and relevance: In this decision analytical model study, a 10-percentage point increase in uptake of USPSTF-recommended lung, colorectal, breast, and cervical cancer screening at the recommended starting age was estimated to yield important reductions in cancer deaths. Achieving these reductions is predicated on ensuring equitable access to screening.
    MeSH term(s) Adult ; Humans ; Female ; Uterine Cervical Neoplasms/diagnosis ; Uterine Cervical Neoplasms/prevention & control ; Early Detection of Cancer/methods ; Mass Screening ; Breast Neoplasms/diagnosis ; Breast Neoplasms/prevention & control ; Lung Neoplasms/diagnosis ; Lung Neoplasms/prevention & control ; Lung ; Colorectal Neoplasms/diagnosis ; Colorectal Neoplasms/prevention & control
    Language English
    Publishing date 2023-11-01
    Publishing country United States
    Document type Journal Article
    ISSN 2574-3805
    ISSN (online) 2574-3805
    DOI 10.1001/jamanetworkopen.2023.44698
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  3. Article ; Online: NordICC Trial Results in Line With Expected Colorectal Cancer Mortality Reduction After Colonoscopy: A Modeling Study.

    van den Berg, Danica M N / Nascimento de Lima, Pedro / Knudsen, Amy B / Rutter, Carolyn M / Weinberg, David / Lansdorp-Vogelaar, Iris

    Gastroenterology

    2023  Volume 165, Issue 4, Page(s) 1077–1079.e2

    MeSH term(s) Humans ; Colonoscopy/methods ; Colorectal Neoplasms/diagnosis ; Early Detection of Cancer/methods ; Mass Screening/methods
    Language English
    Publishing date 2023-07-15
    Publishing country United States
    Document type Letter ; Research Support, N.I.H., Extramural ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 80112-4
    ISSN 1528-0012 ; 0016-5085
    ISSN (online) 1528-0012
    ISSN 0016-5085
    DOI 10.1053/j.gastro.2023.06.035
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Cost-Effectiveness Analysis of Screening for Pancreatic Cancer Among High-Risk Populations.

    Peters, Mary Linton B / Eckel, Andrew / Seguin, Claudia L / Davidi, Barak / Howard, David H / Knudsen, Amy B / Pandharipande, Pari V

    JCO oncology practice

    2023  Volume 20, Issue 2, Page(s) 278–290

    Abstract: Purpose: We evaluated the potential cost-effectiveness of combined magnetic resonance imaging (MRI) and endoscopic ultrasound (EUS) screening for pancreatic ductal adenocarcinoma (PDAC) among populations at high risk for the disease.: Methods: We ... ...

    Abstract Purpose: We evaluated the potential cost-effectiveness of combined magnetic resonance imaging (MRI) and endoscopic ultrasound (EUS) screening for pancreatic ductal adenocarcinoma (PDAC) among populations at high risk for the disease.
    Methods: We used a microsimulation model of the natural history of PDAC to estimate the lifetime health benefits, costs, and cost-effectiveness of PDAC screening among populations with specific genetic risk factors for PDAC, including
    Results: For men with relative risk (RR) 12.33 (
    Conclusion: Combined MRI/EUS screening may be a cost-effective approach for the highest-risk populations (among mutations considered, those with RR >12). However, for those with moderate risk (RR, 5-12), screening would only be cost-effective at higher WTP thresholds (eg, $200K USD/QALY) or with once-only screening.
    MeSH term(s) Humans ; Female ; Aged ; United States ; Middle Aged ; Cost-Effectiveness Analysis ; Cost-Benefit Analysis ; Early Detection of Cancer/methods ; Medicare ; Risk Factors ; Pancreatic Neoplasms/diagnosis
    Language English
    Publishing date 2023-12-12
    Publishing country United States
    Document type Journal Article
    ZDB-ID 3028198-2
    ISSN 2688-1535 ; 2688-1527
    ISSN (online) 2688-1535
    ISSN 2688-1527
    DOI 10.1200/OP.23.00495
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Ultrasound Surveillance of Small, Incidentally Detected Gallbladder Polyps: Projected Benefits by Sex, Age, and Comorbidity Level.

    Seguin, Claudia L / Davidi, Barak / Peters, Mary Linton B / Eckel, Andrew / Harisinghani, Mukesh G / Goiffon, Reece J / Knudsen, Amy B / Pandharipande, Pari V

    Journal of the American College of Radiology : JACR

    2023  Volume 20, Issue 10, Page(s) 1031–1041

    Abstract: Objective: Incidentally detected gallbladder polyps are commonly encountered when performing upper abdominal ultrasound. Our purpose was to estimate the life expectancy (LE) benefit of ultrasound-based gallbladder surveillance in patients with small (6- ... ...

    Abstract Objective: Incidentally detected gallbladder polyps are commonly encountered when performing upper abdominal ultrasound. Our purpose was to estimate the life expectancy (LE) benefit of ultrasound-based gallbladder surveillance in patients with small (6-7 to <10 mm), incidentally detected gallbladder polyps, accounting for patient sex, age, and comorbidity level.
    Methods: We developed a decision-analytic Markov model to evaluate hypothetical cohorts of women and men with small gallbladder polyps, with varying age (66-80 years) and comorbidity level (none, mild, moderate, severe). Drawing from current evidence, in the base case, we assumed no increased risk of gallbladder cancer in patients with small gallbladder polyps. To estimate maximal possible LE gains from surveillance, we assumed perfect cancer control consequent to 5 years of surveillance. We varied key assumptions including cancer risk and test performance characteristics in sensitivity analysis.
    Results: Projected LE gains from surveillance were <3 days across most cohorts and scenarios evaluated. For 66- and 80-year-olds with no comorbidities, LE gains were 1.46 and 1.45 days, respectively, for women, and 0.67 and 0.75 days for men. With 10 years of surveillance, LE gains increased to 2.94 days for 66-year-old women with no comorbidities (men: 1.35 days). If we assumed a 10% increase in gallbladder cancer risk among individuals with polyps, LE gains increased slightly to 1.60 days for 66-year-old women with no comorbidities (men: 0.74 days). Results were sensitive to test performance and surgical mortality.
    Discussion: Even under unrealistic, optimistic assumptions of cancer control, ultrasound surveillance of incidentally detected small gallbladder polyps provided limited benefit.
    MeSH term(s) Male ; Humans ; Female ; Aged ; Aged, 80 and over ; Infant ; Gallbladder Neoplasms/diagnostic imaging ; Gallbladder Neoplasms/epidemiology ; Gallbladder Neoplasms/surgery ; Polyps/diagnostic imaging ; Polyps/epidemiology ; Polyps/surgery ; Ultrasonography ; Comorbidity
    Language English
    Publishing date 2023-07-03
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, N.I.H., Extramural
    ZDB-ID 2274861-1
    ISSN 1558-349X ; 1546-1440
    ISSN (online) 1558-349X
    ISSN 1546-1440
    DOI 10.1016/j.jacr.2023.05.015
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  6. Article: Emulator-based Bayesian calibration of the CISNET colorectal cancer models.

    Pineda-Antunez, Carlos / Seguin, Claudia / van Duuren, Luuk A / Knudsen, Amy B / Davidi, Barak / de Lima, Pedro Nascimento / Rutter, Carolyn / Kuntz, Karen M / Lansdorp-Vogelaar, Iris / Collier, Nicholson / Ozik, Jonathan / Alarid-Escudero, Fernando

    medRxiv : the preprint server for health sciences

    2024  

    Abstract: Purpose: To calibrate Cancer Intervention and Surveillance Modeling Network (CISNET) 's SimCRC, MISCAN-Colon, and CRC-SPIN simulation models of the natural history colorectal cancer (CRC) with an emulator-based Bayesian algorithm and internally validate ...

    Abstract Purpose: To calibrate Cancer Intervention and Surveillance Modeling Network (CISNET) 's SimCRC, MISCAN-Colon, and CRC-SPIN simulation models of the natural history colorectal cancer (CRC) with an emulator-based Bayesian algorithm and internally validate the model-predicted outcomes to calibration targets.
    Methods: We used Latin hypercube sampling to sample up to 50,000 parameter sets for each CISNET-CRC model and generated the corresponding outputs. We trained multilayer perceptron artificial neural networks (ANN) as emulators using the input and output samples for each CISNET-CRC model. We selected ANN structures with corresponding hyperparameters (i.e., number of hidden layers, nodes, activation functions, epochs, and optimizer) that minimize the predicted mean square error on the validation sample. We implemented the ANN emulators in a probabilistic programming language and calibrated the input parameters with Hamiltonian Monte Carlo-based algorithms to obtain the joint posterior distributions of the CISNET-CRC models' parameters. We internally validated each calibrated emulator by comparing the model-predicted posterior outputs against the calibration targets.
    Results: The optimal ANN for SimCRC had four hidden layers and 360 hidden nodes, MISCAN-Colon had 4 hidden layers and 114 hidden nodes, and CRC-SPIN had one hidden layer and 140 hidden nodes. The total time for training and calibrating the emulators was 7.3, 4.0, and 0.66 hours for SimCRC, MISCAN-Colon, and CRC-SPIN, respectively. The mean of the model-predicted outputs fell within the 95% confidence intervals of the calibration targets in 98 of 110 for SimCRC, 65 of 93 for MISCAN, and 31 of 41 targets for CRC-SPIN.
    Conclusions: Using ANN emulators is a practical solution to reduce the computational burden and complexity for Bayesian calibration of individual-level simulation models used for policy analysis, like the CISNET CRC models. In this work, we present a step-by-step guide to constructing emulators for calibrating three realistic CRC individual-level models using a Bayesian approach.
    Language English
    Publishing date 2024-02-05
    Publishing country United States
    Document type Preprint
    DOI 10.1101/2023.02.27.23286525
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  7. Article ; Online: Black and White Differences in Colorectal Cancer Screening and Screening Outcomes: A Narrative Review.

    Rutter, Carolyn M / Knudsen, Amy B / Lin, Jennifer S / Bouskill, Kathryn E

    Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology

    2020  Volume 30, Issue 1, Page(s) 3–12

    Abstract: Racial disparities in colorectal cancer incidence are widely documented. There are two potential mechanisms for these disparities: differences in access to screening, including screening follow-up, and differences in underlying risk of colorectal cancer. ...

    Abstract Racial disparities in colorectal cancer incidence are widely documented. There are two potential mechanisms for these disparities: differences in access to screening, including screening follow-up, and differences in underlying risk of colorectal cancer. We reviewed the literature for evidence of these two mechanisms. We show that higher colorectal cancer incidence in blacks relative to whites emerged only after the dissemination of screening and describe evidence of racial disparities in screening rates. In contrast to the strong evidence for differences in colorectal cancer screening utilization, there is limited evidence for racial differences in adenoma prevalence. In general, black and white patients who are screened have similar adenoma prevalence, though there is some evidence that advanced adenomas and adenomas in the proximal colon are somewhat more likely in black than white patients. We conclude that higher rates of colorectal cancer incidence among black patients are primarily driven by lower rates of colorectal cancer screening. Our findings highlight the need to increase black patients' access to quality screening to reduce colorectal cancer incidence and mortality.
    MeSH term(s) Adenoma/ethnology ; Adenoma/prevention & control ; African Americans/statistics & numerical data ; Colorectal Neoplasms/ethnology ; Colorectal Neoplasms/prevention & control ; Health Status Disparities ; Humans ; Incidence ; Mass Screening/statistics & numerical data ; Outcome Assessment, Health Care/statistics & numerical data ; Risk Factors ; United States/epidemiology ; Whites/statistics & numerical data
    Language English
    Publishing date 2020-11-03
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S. ; Review
    ZDB-ID 1153420-5
    ISSN 1538-7755 ; 1055-9965
    ISSN (online) 1538-7755
    ISSN 1055-9965
    DOI 10.1158/1055-9965.EPI-19-1537
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  8. Article ; Online: Colorectal Cancer Screening in Young Adults.

    Knudsen, Amy B / Rutter, Carolyn M / Meester, Reinier G S / Lansdorp-Vogelaar, Iris / Zauber, Ann G / Kuntz, Karen M

    Annals of internal medicine

    2021  Volume 174, Issue 7, Page(s) 1039–1040

    MeSH term(s) Colonoscopy ; Colorectal Neoplasms/diagnosis ; Early Detection of Cancer ; Humans ; Young Adult
    Language English
    Publishing date 2021-07-02
    Publishing country United States
    Document type Letter ; Comment
    ZDB-ID 336-0
    ISSN 1539-3704 ; 0003-4819
    ISSN (online) 1539-3704
    ISSN 0003-4819
    DOI 10.7326/L21-0245
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  9. Article ; Online: Effectiveness and Cost-Effectiveness of Colorectal Cancer Screening With a Blood Test That Meets the Centers for Medicare & Medicaid Services Coverage Decision.

    van den Puttelaar, Rosita / Nascimento de Lima, Pedro / Knudsen, Amy B / Rutter, Carolyn M / Kuntz, Karen M / de Jonge, Lucie / Escudero, Fernando Alarid / Lieberman, David / Zauber, Ann G / Hahn, Anne I / Inadomi, John M / Lansdorp-Vogelaar, Iris

    Gastroenterology

    2024  

    Abstract: Background & aims: A blood-based colorectal cancer (CRC) screening test may increase screening participation. However, blood tests may be less effective than current guideline-endorsed options. The Centers for Medicare & Medicaid Services (CMS) covers ... ...

    Abstract Background & aims: A blood-based colorectal cancer (CRC) screening test may increase screening participation. However, blood tests may be less effective than current guideline-endorsed options. The Centers for Medicare & Medicaid Services (CMS) covers blood tests with sensitivity of at least 74% for detection of CRC and specificity of at least 90%. In this study, we investigate whether a blood test that meets these criteria is cost-effective.
    Methods: Three microsimulation models for CRC (MISCAN-Colon, CRC-SPIN, and SimCRC) were used to estimate the effectiveness and cost-effectiveness of triennial blood-based screening (from ages 45 to 75 years) compared to no screening, annual fecal immunochemical testing (FIT), triennial stool DNA testing combined with an FIT assay, and colonoscopy screening every 10 years. The CMS coverage criteria were used as performance characteristics of the hypothetical blood test. We varied screening ages, test performance characteristics, and screening uptake in a sensitivity analysis.
    Results: Without screening, the models predicted 77-88 CRC cases and 32-36 CRC deaths per 1000 individuals, costing $5.3-$5.8 million. Compared to no screening, blood-based screening was cost-effective, with an additional cost of $25,600-$43,700 per quality-adjusted life-year gained (QALYG). However, compared to FIT, triennial stool DNA testing combined with FIT, and colonoscopy, blood-based screening was not cost-effective, with both a decrease in QALYG and an increase in costs. FIT remained more effective (+5-24 QALYG) and less costly (-$3.2 to -$3.5 million) than blood-based screening even when uptake of blood-based screening was 20 percentage points higher than uptake of FIT.
    Conclusion: Even with higher screening uptake, triennial blood-based screening, with the CMS-specified minimum performance sensitivity of 74% and specificity of 90%, was not projected to be cost-effective compared with established strategies for colorectal cancer screening.
    Language English
    Publishing date 2024-03-18
    Publishing country United States
    Document type Journal Article
    ZDB-ID 80112-4
    ISSN 1528-0012 ; 0016-5085
    ISSN (online) 1528-0012
    ISSN 0016-5085
    DOI 10.1053/j.gastro.2024.02.012
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  10. Article ; Online: Estimated Reductions in Opioid Overdose Deaths With Sustainment of Public Health Interventions in 4 US States.

    Chhatwal, Jagpreet / Mueller, Peter P / Chen, Qiushi / Kulkarni, Neeti / Adee, Madeline / Zarkin, Gary / LaRochelle, Marc R / Knudsen, Amy B / Barbosa, Carolina

    JAMA network open

    2023  Volume 6, Issue 6, Page(s) e2314925

    Abstract: Importance: In 2021, more than 80 000 US residents died from an opioid overdose. Public health intervention initiatives, such as the Helping to End Addiction Long-term (HEALing) Communities Study (HCS), are being launched with the goal of reducing ... ...

    Abstract Importance: In 2021, more than 80 000 US residents died from an opioid overdose. Public health intervention initiatives, such as the Helping to End Addiction Long-term (HEALing) Communities Study (HCS), are being launched with the goal of reducing opioid-related overdose deaths (OODs).
    Objective: To estimate the change in the projected number of OODs under different scenarios of the duration of sustainment of interventions, compared with the status quo.
    Design, setting, and participants: This decision analytical model simulated the opioid epidemic in the 4 states participating in the HCS (ie, Kentucky, Massachusetts, New York, and Ohio) from 2020 to 2026. Participants were a simulated population transitioning from opioid misuse to opioid use disorder (OUD), overdose, treatment, and relapse. The model was calibrated using 2015 to 2020 data from the National Survey on Drug Use and Health, the US Centers for Disease Control and Prevention, and other sources for each state. The model accounts for reduced initiation of medications for OUD (MOUDs) and increased OODs during the COVID-19 pandemic.
    Exposure: Increasing MOUD initiation by 2- or 5-fold, improving MOUD retention to the rates achieved in clinical trial settings, increasing naloxone distribution efforts, and furthering safe opioid prescribing. An initial 2-year duration of interventions was simulated, with potential sustainment for up to 3 additional years.
    Main outcomes and measures: Projected reduction in number of OODs under different combinations and durations of sustainment of interventions.
    Results: Compared with the status quo, the estimated annual reduction in OODs at the end of the second year of interventions was 13% to 17% in Kentucky, 17% to 27% in Massachusetts, 15% to 22% in New York, and 15% to 22% in Ohio. Sustaining all interventions for an additional 3 years was estimated to reduce the annual number of OODs at the end of the fifth year by 18% to 27% in Kentucky, 28% to 46% in Massachusetts, 22% to 34% in New York, and 25% to 41% in Ohio. The longer the interventions were sustained, the better the outcomes; however, these positive gains would be washed out if interventions were not sustained.
    Conclusions and relevance: In this decision analytical model study of the opioid epidemic in 4 US states, sustained implementation of interventions, including increased delivery of MOUDs and naloxone supply, was found to be needed to reduce OODs and prevent deaths from increasing again.
    MeSH term(s) Humans ; Analgesics, Opioid/toxicity ; COVID-19/epidemiology ; Drug Overdose/epidemiology ; Drug Overdose/prevention & control ; Drug Overdose/drug therapy ; Naloxone/therapeutic use ; Opiate Overdose/epidemiology ; Opioid-Related Disorders/epidemiology ; Opioid-Related Disorders/prevention & control ; Opioid-Related Disorders/drug therapy ; Pandemics ; Practice Patterns, Physicians' ; Public Health
    Chemical Substances Analgesics, Opioid ; Naloxone (36B82AMQ7N)
    Language English
    Publishing date 2023-06-01
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ISSN 2574-3805
    ISSN (online) 2574-3805
    DOI 10.1001/jamanetworkopen.2023.14925
    Database MEDical Literature Analysis and Retrieval System OnLINE

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