Neoplasms

Skin and Connective Tissue Diseases

All Conditions

Breast Neoplasms

Non-proportional stratified sample of women diagnosed with interval or screen-detected breast cancers after participation in BreastScreen Norway. This sample will include under- or overdiagnosed cancers, as well as cancers that were not under- or overdiagnosed.

Women residing in Norway, born between 1927 and 1934 (inclusive). This cohort will include women who have attended screening and who have not attended screening.

Women aged 50-69, and practising family doctors aged 25-75, currently living in Norway.

Diagnosed with a cancer that was visible on prior mammograms

Under- or overdiagnosed cancer

Screening

Solveig Hofvind, PhD

This PhD project will describe tumour characteristics and survival associated with of under- and overdiagnosed breast cancers, the rate of overdiagnosis in BreastScreen Norway, and whether women and family doctors are aware of, and knowledgeable about, under- and overdiagnosis in breast cancer screening.

Mammographic screening among women aged 50-69 reduces breast cancer mortality but also carries some risk. This PhD project will study under- and overdiagnosis, two risks associated with mammographic screening, in BreastScreen Norway. Underdiagnosis can occur when a tumour is present but not detected as a result of screening, while overdiagnosis can occur when a woman is diagnosed with a slow growing cancer that would not become symptomatic during her lifetime.

This project will address the following topics and research questions using observational study methods.

Study 1: To determine whether tumour histopathology and survival differentially associated with potentially under- or overdiagnosed interval and screen-detected breast cancers.

* Do women with potentially underdiagnosed interval cancers have different tumour histopathology and survival than those whose interval cancers showed no signs at the prior screen?
* Do women with potentially overdiagnosed screen-detected cancer have different tumour histopathology and survival than those whose screen-detected cancer showed no signs at the prior screen?

Study 2: To estimate overdiagnosis in the screening program using individual-level data:

* What was the rate of overdiagnosis for women screened in the program during 1996-2003?
* How does adjusting for sociodemographic factors affect estimates of overdiagnosis?

Study 3: To describe awareness and knowledge about under- and overdiagnosis and breast screening in general:

* Are women aware of and knowledgeable about under- and overdiagnosis in breast screening?
* Are family doctors aware of and knowledgeable about breast screening, and under- and overdiagnosis? Are they confident in their ability to relay this information to their patients?

Study 1 is a quality improvement study and has approval from Personvernombudet (PVO 2016-4696). Study 2 has research ethics board (REK) approval (REK 2013/795), while REK approval will be sought for Study 3.

Under- and Overdiagnosis in BreastScreen Norway

Using a self-administered web-based questionnaire designed for this study, the investigators will analyse survey responses to determine whether self-reported age (categorised into 5-year age groups) is associated with awareness and knowledge of overdiagnosis. This will be done separately for women and family doctors.

Using a self-administered web-based questionnaire designed for this study, the investigators will analyse survey responses to determine whether self-reported formal education (none; primary school; high school; up to 4 years postsecondary; more than 4 years of postsecondary education) is associated with awareness and knowledge of overdiagnosis among women.

- Histopathological type (Ductal carcinoma in situ, invasive carcinoma of no special type, invasive lobular carcinoma)

- Crude and adjusted measures of overdiagnosis will be presented to show the amount and direction of confounding resulting from sociodemographic factors.

Agreement between awareness (yes versus no/incomplete) and knowledge (yes versus no/incomplete) of overdiagnosis

Extrastiftelsen

Cancer Registry of Norway

Digestive System Diseases

Symptoms and General Pathology

Carcinoma

Liver Cirrhosis

Carcinoma, Hepatocellular

Neoplasms, Glandular and Epithelial

Neoplasms by Histologic Type

Adenocarcinoma

Liver Neoplasms

Gastrointestinal Neoplasms

Digestive System Neoplasms

Gastrointestinal Diseases

Liver Diseases

This study will collect prospective longitudinal data to characterize rates and identify correlates of a) physical harms due to follow-up tests, b) financial harms, and c) inappropriate screening using electronic medical record data and manual chart review. The study will also use surveys and semi-structured interviews to characterize rates and identify correlates of screening-related psychological harms, e.g. cancer specific worry, situational anxiety, mood disturbances, and decisional regret. Lastly, investigators will create and disseminate a balance sheet of benefits and harms to inform patients, providers, healthcare organizations, payers, and policymakers about the role of hepatocellular carcinoma screening in patients with cirrhosis.

We will prospectively follow the cohort using electronic medical record to document the hepatocellular carcinoma screening process and characterize physical and financial harms related to positive or indeterminate screening results and burden of inappropriate screening. Patients are anticipated to undergo hepatocellular carcinoma screening every 6-12 months, so each patient will have \~4-8 screening encounters over the study duration. We will use manual chart review to determine intent of ultrasound exams (screening vs. diagnostic) and test results. Receipt of follow-up tests after positive or indeterminate screening results will be identified through electronic medical record extraction using Current Procedural Terminology (CPT) codes for CT, MRI, and biopsy.

Prospective Longitudinal Data

We will use surveys and semi-structured interviews to characterize psychological harms after positive or indeterminate screening tests. Patient surveys will include patient-reported scales to measure psychosocial factors at three times points: baseline, 1 month after screening result, and 4 months after screening result. Semi-structured interviews will be conducted via telephone to explore patient attitudes toward risk perception, test follow-up, competing demands, and "downstream harms", particularly financial issues (e.g., out-of-pocket costs, access to insurance, and juggling hepatocellular carcinoma screening process completion with competing demands-work and family).

Surveys and Semi-structured Interviews

Amit Singal, MD

This study leverage a multi-center randomized controlled trial assessing screening-related benefits (i.e. early tumor detection, treatment eligibility, and overall survival) among a racially and socioeconomically diverse population of patients with cirrhosis. However, the randomized controlled trial was not budgeted to assess hepatocellular carcinoma screening-related harms. The goal of this study is to quantify physical, financial, and psychosocial harms across three healthcare settings.

Leveraging a multi-center randomized controlled trial assessing screening benefits in a socioeconomically and racially diverse population of patients with cirrhosis followed in 3 healthcare settings over a 4-year period, this study aims to:

Aim 1: Assess the effect of hepatocellular carcinoma screening on a) physical harms due to follow-up tests, b) financial harms, and c) overdiagnosis in patients with severe liver dysfunction or comorbid illness, through electronic medical record data, manual chart review, and validated survey measures.

Aim 2: Assess the effect of hepatocellular carcinoma screening on screening-related psychosocial harms, e.g. cancer-specific worry, situational anxiety, mood disturbances, and decisional regret, through longitudinal validated measures and qualitative interviews.

Aim 3: Create and disseminate a balance sheet of benefits and harms to inform patients, providers, healthcare organizations, payers, and policymakers about the value of hepatocellular carcinoma screening in patients with cirrhosis.

Over a 4-year period, electronic medical record data will be used to compare screening-related physical and financial harms between patients undergoing and those not undergoing hepatocellular carcinoma screening. Psychosocial harms, as ascertained through longitudinal measurement of validated survey instruments and qualitative interviews, will be compared between patients with positive or indeterminate screening results and those with negative results or without any screening. Mixed-effect regression analysis will be used to determine if screening harms differed by factors at multiple levels including patient (e.g. degree of liver dysfunction), provider (e.g. subspecialty training), and healthcare organization (e.g. access to liver transplantation). This study will seamlessly complement data from the parent randomized controlled trial. By immediately translating these high quality data about hepatocellular carcinoma screening benefits and harms into a balance sheet, the investigators will facilitate patient-provider discussions, inform payer decisions about reimbursement, and guide policy decisions. These data are also crucial to identify modifiable and high-yield intervention targets and strategies to reduce hepatocellular carcinoma screening harms in the future.

Harms of Hepatocellular Carcinoma Surveillance

Harms of Hepatocellular Carcinoma Surveillance in Patients With Cirrhosis

Physical harms (contrast injury, radiation exposure, and biopsy complications) can result from screening or follow-up testing and extends beyond medical complications to include discomfort. A binary outcome (harm vs. no harm) will be defined for each person and each type of physical harm (contrast injury, radiation exposure, biopsy, and any physical harm). We will report the point estimate and 95% confidence interval for the proportion of patients with each type of harm in each arm, stratified by health system. Using an intention-to-treat principle, we will use Chi squared test to compare the proportion of patients with physical harms between the screening and usual care arms, with a secondary analysis stratified by health system. We will also perform a sensitivity analysis based on test intent, in which we will only include tests (and corresponding harms) performed as a direct result of hepatocellular carcinoma screening.

Financial harms may include anticipated or real costs of hepatocellular carcinoma screening and diagnostic evaluation including, indirect costs such as missed work, and opportunity costs such as distraction from other health-related activities. Financial harms will be summarized for each arm using descriptive analyses as average and range of costs per person. Degree of financial harms will be compared between the hepatocellular carcinoma screening and usual care arms using Student T test, with a secondary analysis stratified by health system. In a secondary analysis, a mixed-effect model approach will be employed to identify patient-, provider- and system-level factors associated with financial harm.

Defined as hepatocellular carcinoma diagnoses that are unlikely to have an effect on mortality, specifically among patients with: 1) significant comorbid conditions or 2) severe liver dysfunction, i.e. Child Pugh C cirrhosis, who are not candidates for liver transplantation, at hepatocellular carcinoma diagnosis. For the primary analysis, Chi squared test will be used to compare the proportion of patients with overdiagnosis between the screening arm and usual care arm, stratified by health system.

Patients will be divided into 4 categories: true positives, false positives, true negatives, and no screening. True positives will be defined as those who develop hepatocellular carcinoma within 6 months of the screening test; false positives as those who remain without hepatocellular carcinoma diagnosis during 6 months of follow-up; and true negatives as those with normal screening tests and without hepatocellular carcinoma diagnosis during 6 months of follow-up. Psychosocial harms (cancer-specific worry, situational anxiety, mood disturbances, and decisional regret) will be defined by change in survey scores from baseline and will be calculated at 1 month and 6 months for each patient.

As a secondary analysis, we will construct mixed-effect logistic regression models to identify patient-, provider-, and system-level factors associated with physical harms (contrast injury, radiation exposure, biopsy, and any physical harm). Models will include random effects for providers and health systems to account for potential correlation at different levels. Final models will include covariates identified by stepwise variable selection procedure and those considered clinically important a priori (BMI, race, liver dysfunction, and gastroenterology care). Statistical significance will be declared for p\<0.05.

We will construct a mixed regression model with the outcome being decisional regret and covariates including patient-, provider- and system-level factors. Decisional regret score, ranging from 0 to 100, will be analyzed as a continuous outcome. The mixed model will include random effects for providers and systems to account for correlation at different levels. The model will include covariates identified through stepwise variable selection and those considered clinically important a priori (age, gender, race and ethnicity, liver dysfunction).

Physical harms (contrast injury, radiation exposure, and biopsy complications) can result from screening or follow-up testing and extends beyond medical complications to include discomfort.

Study title	NCT ID	Conditions	Interventions	Eligibility	Organization
Under- and Overdiagnosis in BreastScreen Norway	NCT03852953	Breast Cancer	Under- or overd... Screening	25 Years - 75 Years	Cancer Registry of Norway
Under- and Overdiagnosis in BreastScreen Norway	NCT03852953	Breast Cancer	Under- or overd... Screening	25 Years - 75 Years	Cancer Registry of Norway
Harms of Hepatocellular Carcinoma Surveillance	NCT03756051	Carcinoma, Hepa...	Prospective Lon... Surveys and Sem...	21 Years -	University of Texas Southwestern Medical Center

Spots Global Cancer Trial Database for overdiagnosis