Bette J. Caan, DrPH

People

Kaiser Permanente Division of Research
2000 Broadway
Oakland, CA 94612

(510) 891-3719 (phone)
bette.caan@kp.org
Kaiser Permanente Researcher Profiles

Dr. Bette Caan is a senior research scientist and a nutritional epidemiologist at the Kaiser Permanente Northern California Division of Research. She has been at the Division of Research since 1983. Dr. Caan holds a master's degree in nutrition from Columbia University, a master's degree in epidemiology from the University of California, Berkeley, and a doctorate in public health nutrition from the University of California, Berkeley.

Dr. Caan directs a research program in the examination of modifiable lifestyle risk factors for the prevention and progression of cancer, with a focus on body composition and energy balance risk factors. Dr. Caan has expertise in the assessment of diet and body composition and the conduct of dietary intervention trials. She has authored or co-authored over 450 publications while a researcher at DOR. Her research publications cover a wide range of topics, primarily in nutrition and body size, cancer epidemiology, and women's health.

Dr. Caan is currently the Principal Investigator of several federally funded research projects including two large observational studies examining effects of body composition on breast and colorectal cancer outcomes; an intervention trial studying if strength training can reduce side effects of chemotherapy; and the LILAC Women's Health Initiative (WHI) Cancer Survivor Cohort, a cohort of 20,000 older women diagnosed with cancer during the WHI follow-up period currently being followed for recurrence and survival and survivorship outcomes. Dr. Caan has recently published several papers on the obesity paradox in cancer, advocating that body mass index (BMI) misclassifies patients with regard to adiposity; she is also in part responsible for identifying the obesity paradox. However, equally important in explaining the obesity paradox is that low muscle or sarcopenia is an important, underappreciated risk factor for poor survival, and that it is highly prevalent in normal-weight cancer patients.

Current Position(s):

Research Scientist III, Division of Research, Kaiser Permanente Northern California

Section Affiliations:

Primary Research Interests:

Dietary risk and anthropometric risk factors for cancer survival
Dietary intervention trials
Dietary and body composition measurement and assessment
Women’s health

Studies

Cancer and Body Composition Webinar Series

This monthly webinar series, attended by approximately 200 people from diverse disciplines, is ongoing and focuses on topics relevant to body composition and cancer. The Division of Research will host 10 webinar speakers who are prominent in the field; archive recordings; and write a paper summarizing advances in the field.
Investigator: Caan, Bette
Funder: National Cancer Institute

Body Composition and the Obesity Paradox in Clear-Cell Renal Cell Carcinoma

Aim 1: Determine associations among body mass index (BMI), body composition variables, and tumor subtype. The amount and quality of muscle, visceral adipose tissue, and subcutaneous adipose tissue will be derived from existing pre-surgical CT scans; and ccA/ccB subtypes will be derived from archived tumor specimens using NanoString. Aim 2. Identify body composition variables independently associated with ccRCC prognosis after accounting for tumor subtype. Multivariable models adjusting for demographics, BMI, comorbidities, and known prognostic factors will estimate how body composition variables are associated with disease progression, cancer-specific, and overall survival and whether these associations are modified or mediated by tumor subtype. Aim 3. Identify novel pathways through which body composition may affect prognosis.
Investigator: Caan, Bette
Funder: National Cancer Institute

Circulating Biomarker Consortium for Pancreatic Early Detection

This is a retrospective case-control study to examine the timing and magnitude of loss of muscle and adiposity prior to diagnosis of pancreatic cancer.
Investigator: Caan, Bette
Funder: Dana Farber Cancer Institute

Resistance Training to Reduce Chemotoxicity in Colon Cancer

The goal of this study is to test a randomized intervention of up to six months of home-based resistance training and protein supplementation versus a waitlist control. The intervention will begin during the first month of chemotherapy and continue through completion of treatment. The study will examine differences in chemotherapy outcomes, including reductions in dosing, treatment delays, and early discontinuation of treatment; differences in total combined number of moderate and severe grade 3 and 4 toxicities; and pre and post intervention differences in the pharmacokinetics of FOLFOX (colon cancer chemotherapy regimen), changes in body composition, functional status, and strength. If improving muscle mass through resistance training leads to a reduced risk of chemotoxicities, CT scans routinely performed for clinical diagnosis could be used to identify high-risk patients who will benefit from tailored exercise guidelines.
Investigator: Caan, Bette
Funder: National Cancer Institute

WHI Cancer Survivor Cohort

The primary goal of this research project is to create an infrastructure within WHI to build a resource for the study of molecular epidemiology and cancer survivorship. Cancer survivors will be followed annually with surveys; tumor tissue will be acquired; and methodological studies will be established to develop electronic linkages with HMO and Medicare data for treatment and outcomes.
Investigator: Caan, Bette
Funder: National Cancer Institute

MsFLASH: Living a Healthy Menopause

The aims of this study are: 1) Conduct a 4-arm, double-blind, placebo-controlled randomized trial among postmenopausal women with vaginitis symptoms (moderate/severe vaginal dryness, burning, itching, pain or dyspareunia in the absence of infection) to compare the efficacy of: (a) the probiotic Lactin V, (b) ultra-low dose vaginal estrogen, (Vagifem 10 mcg), and (c) the combination of Lactin V + Vagifem to (d) matching placebos for relief of vaginitis symptoms after 8 weeks of treatment using the most bothersome symptom score as the primary trial outcome. 2) Using the cases recruited for the trial and a group of matched controls (women without symptoms of postmenopausal vaginitis), conduct a case-control study to determine whether patterns of vaginal bacterial colonization, such as pro-inflammatory anaerobic species, differ among women with and without symptoms of postmenopausal vaginitis.
Investigator: Caan, Bette
Funder: National Institute on Aging

Exploring the Role of Sarcopenia in Obesity and Breast Cancer Survival

The aim of this study is to gain a better understanding of the role of sarcopenia and body composition in the relationship between obesity and risk of breast cancer progression. We propose to use existing CT scans performed as a part of regular clinical care in this novel application to examine: 1) levels of fat and muscle mass among newly diagnosed breast cancer patients to determine prevalence of sarcopenia among underweight, normal weight, overweight, mildly obese and morbidly obese breast cancer survivors; 2) relationships between categories of fat mass and lean muscle mass at diagnosis (including sarcopenic obesity) and breast tumor characteristics predictive of risk of recurrence and death including disease stage, subtype (ER, PR, and Her2 Neu status), and proliferation markers, 3) relationships between body composition and chemotoxicity; and 4) associations between categories of fat mass and muscle mass and breast cancer-specific and overall mortality.
Investigator: Caan, Bette
Funder: National Cancer Institute

Highlighted Publications

No results found matching criteria

Publications

Pre-Diagnosis Exercise and Cardiovascular Events in Primary Breast Cancer: Women's Health Initiative

Author(s): Okwuosa TM; Ray RM; Palomo A; Foraker RE; Johnson L; Paskett ED; Caan B; Jones LW

JACC CardioOncol. 2019 Sep;1(1):41-50. Epub 2019-09-24.

Current Position(s):

Section Affiliations:

Primary Research Interests:

Studies

Cancer and Body Composition Webinar Series

Body Composition and the Obesity Paradox in Clear-Cell Renal Cell Carcinoma

Circulating Biomarker Consortium for Pancreatic Early Detection

Resistance Training to Reduce Chemotoxicity in Colon Cancer

WHI Cancer Survivor Cohort

MsFLASH: Living a Healthy Menopause

Exploring the Role of Sarcopenia in Obesity and Breast Cancer Survival

Highlighted Publications

Publications

Pre-Diagnosis Exercise and Cardiovascular Events in Primary Breast Cancer: Women's Health Initiative

Individual- and neighborhood-level socioeconomic status and risk of aggressive breast cancer subtypes in a pooled cohort of women from Kaiser Permanente Northern California

Association of germline genetic variants with breast cancer-specific survival in patient subgroups defined by clinic-pathological variables related to tumor biology and type of systemic treatment

MRI based validation of abdominal adipose tissue measurements from DXA in postmenopausal women

Sarcopenia in the Older Adult With Cancer

Low-fat dietary pattern and breast cancer mortality by metabolic syndrome components: a secondary analysis of the Women's Health Initiative (WHI) randomised trial

Weight stability masks changes in body composition in colorectal cancer: a retrospective cohort study

Genetic architectures of proximal and distal colorectal cancer are partly distinct

The Role of Home-Based Exercise in Maintaining Skeletal Muscle During Preoperative Pancreatic Cancer Treatment

Alignment of dietary patterns with the Dietary Guidelines for Americans 2015-2020 and risk of all-cause and cause-specific mortality in the Women's Health Initiative Observational Study

Recruitment strategies and design considerations in a trial of resistance training to prevent dose-limiting toxicities in colon cancer patients undergoing chemotherapy

Authors Response

Cardiometabolic risk factors and survival after cancer in the Women's Health Initiative

Association of Prediagnostic Frailty, Change in Frailty Status, and Mortality After Cancer Diagnosis in the Women's Health Initiative

Re. "Association between low muscle mass and survival in incurable cancer patients: A systematic review"

Deep learning method for localization and segmentation of abdominal CT

Association of Low Muscle Mass and Low Muscle Radiodensity With Morbidity and Mortality for Colon Cancer Surgery

Dietary Intakes of Women's Health Initiative Long Life Study Participants Falls Short of the Dietary Reference Intakes

Myocardial infarction accelerates breast cancer via innate immune reprogramming

American Cancer Society guideline for diet and physical activity for cancer prevention

Evaluation of automated computed tomography segmentation to assess body composition and mortality associations in cancer patients

Prenatal Depression and Diet Quality During Pregnancy

Associations between nutritional factors and chemotherapy toxicity in older adults with solid tumors

Prediagnosis social support, social integration, living status, and colorectal cancer mortality in postmenopausal women from the women's health initiative

Lights on MsFLASH: a review of contributions

Sustained weight loss and risk of breast cancer in women ≥50 years: a pooled analysis of prospective data

Body Composition, Adherence to Anthracycline and Taxane-Based Chemotherapy, and Survival After Nonmetastatic Breast Cancer

It's Absolutely Relative: The Effect of Age on the BMI-Mortality Relationship in Postmenopausal Women

Guideline-concordant endometrial cancer treatment and survival in the Women's Health Initiative Life and Longevity After Cancer study

Post diagnosis loss of skeletal muscle, but not adipose tissue, is associated with shorter survival of patients with advanced pancreatic cancer

Statins as a free pass: Body mass index and other cardiovascular risk factors among lipid-lowering medication users and nonusers in the California Men's Health Study

Intentional weight loss, weight cycling, and endometrial cancer risk: a systematic review and meta-analysis

Adipose Tissue Distribution and Cardiovascular Disease Risk Among Breast Cancer Survivors

The Association of Abdominal Adiposity with Mortality in Patients with Stage I-III Colorectal Cancer

An Environmental Scan of Biopsychosocial and Clinical Variables in Cohort Studies of Cancer Survivors

The Effect of Reverse Causality and Selective Attrition on the Relationship Between Body Mass Index and Mortality in Postmenopausal Women

Association of Normal-Weight Central Obesity With All-Cause and Cause-Specific Mortality Among Postmenopausal Women

DNA repair and cancer in colon and rectum: novel players in genetic susceptibility

Body Composition and Cardiovascular Events in Patients With Colorectal Cancer: A Population-Based Retrospective Cohort Study

Muscle segmentation in axial computed tomography (CT) images at the lumbar (L3) and thoracic (T4) levels for body composition analysis

Facebook advertising for recruitment of midlife women with bothersome vaginal symptoms: A pilot study

Meta-analysis of 16 studies of the association of alcohol with colorectal cancer

Adipose Tissue Distribution and Survival Among Women with Nonmetastatic Breast Cancer

Sexual frequency and pain in a randomized clinical trial of vaginal estradiol tablets, moisturizer, and placebo in postmenopausal women

Bariatric Surgery is Associated With Reduced Risk of Breast Cancer in Both Premenopausal and Postmenopausal Women

Post-cancer diagnosis dietary inflammatory potential is associated with survival among women diagnosed with colorectal cancer in the Women's Health Initiative

The association of medical and demographic characteristics with sarcopenia and low muscle radiodensity in patients with nonmetastatic colorectal cancer

Genetic variant predictors of gene expression provide new insight into risk of colorectal cancer

Discovery of common and rare genetic risk variants for colorectal cancer

The evolution of body composition in oncology-epidemiology, clinical trials, and the future of patient care: facts and numbers

Mendelian randomization analysis of C-reactive protein on colorectal cancer risk

Non-alcoholic fatty liver disease and colorectal cancer survival

Diet-related inflammation and risk of prostate cancer in the California Men's Health Study

Differences in molecular features of triple-negative breast cancers based on the age at diagnosis

Screening for low muscularity in colorectal cancer patients: a valid, clinic-friendly approach that predicts mortality

Influence of smoking, body mass index and other factors on the preventive effect of nonsteroidal anti-inflammatory drugs on colorectal cancer risk

Novel Common Genetic Susceptibility Loci for Colorectal Cancer

Stratified probabilistic bias analysis for BMI-related exposure misclassification in postmenopausal women

Changes in Overall Diet Quality in Relation to Survival in Postmenopausal Women with Breast Cancer: Results from the Women's Health Initiative

Mendelian randomisation study of age at menarche and age at menopause and the risk of colorectal cancer

Muscle radiodensity and mortality in patients with colorectal cancer

The deterioration of muscle mass and radiodensity is prognostic of poor survival in stage I-III colorectal cancer: a population-based cohort study (C-SCANS)

The Obesity Paradox in Cancer: How Important Is Muscle?

A Mixed-Effects Model for Powerful Association Tests in Integrative Functional Genomics

Associations of pre-existing co-morbidities with skeletal muscle mass and radiodensity in patients with non-metastatic colorectal cancer

The Importance of Body Composition in Explaining the Overweight Paradox in Cancer-Counterpoint

The Plausibility of the Obesity Paradox in Cancer-Response-Reply to Point

The Comparative Effectiveness of Diabetes Prevention Strategies to Reduce Postpartum Weight Retention in Women With Gestational Diabetes Mellitus; The Gestational Diabetes' Effects on Moms (GEM) Cluster Randomized Controlled Trial.