Recent changes in breast cancer incidence and risk factor prevalence in San Francisco Bay area and California women: 1988 to 2004.

Theresa H Keegan, Ellen T. Chang, Esther M. John, Pamela L. Horn-Ross, Margaret R. Wrensch, Sally L. Glaser, Christina A. Clarke

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

INTRODUCTION: Historically, the incidence rate of breast cancer among non-Hispanic white women living in the San Francisco Bay area (SFBA) of California has been among the highest in the world. Substantial declines in breast cancer incidence rates have been documented in the United States and elsewhere during recent years. In light of these reports, we examined recent changes in breast cancer incidence and risk factor prevalence among non-Hispanic white women in the SFBA and other regions of California. METHODS: Annual age-adjusted breast cancer incidence and mortality rates (1988 to 2004) were obtained from the California Cancer Registry and analyzed using Joinpoint regression. Population-based risk factor prevalences were calculated using two data sources: control subjects from four case-control studies (1989 to 1999) and the 2001 and 2003 California Health Interview Surveys. RESULTS: In the SFBA, incidence rates of invasive breast cancer increased 1.3% per year (95% confidence interval [CI], 0.7% to 2.0%) in 1988-1999 and decreased 3.6% per year (95% CI, 1.6% to 5.6%) in 1999-2004. In other regions of California, incidence rates of invasive breast cancer increased 0.8% per year (95% CI, 0.4% to 1.1%) in 1988-2001 and decreased 4.4% per year (95% CI, 1.4% to 7.3%) in 2001-2004. In both regions, recent (2000-2001 to 2003-2004) decreases in invasive breast cancer occurred only in women 40 years old or older and in women with all histologic subtypes and tumor sizes, hormone receptor-defined types, and all stages except distant disease. Mortality rates declined 2.2% per year (95% CI, 1.8% to 2.6%) from 1988 to 2004 in the SFBA and the rest of California. Use of estrogen-progestin hormone therapy decreased significantly from 2001 to 2003 in both regions. In 2003-2004, invasive breast cancer incidence remained higher (4.2%) in the SFBA than in the rest of California, consistent with the higher distributions of many established risk factors, including advanced education, nulliparity, late age at first birth, and alcohol consumption. CONCLUSION: Ongoing surveillance of breast cancer occurrence patterns in this high-risk population informs breast cancer etiology through comparison of trends with lower-risk populations and by highlighting the importance of examining how broad migration patterns influence the geographic distribution of risk factors.

Original languageEnglish (US)
JournalBreast cancer research : BCR
Volume9
Issue number5
StatePublished - 2007
Externally publishedYes

Fingerprint

San Francisco
Breast Neoplasms
Incidence
Confidence Intervals
Hormones
Population
Birth Order
Mortality
Information Storage and Retrieval
Progestins
Parity
Health Surveys
Alcohol Drinking
Registries
Case-Control Studies
Neoplasms
Estrogens
Interviews
Education

ASJC Scopus subject areas

  • Medicine(all)

Cite this

Recent changes in breast cancer incidence and risk factor prevalence in San Francisco Bay area and California women : 1988 to 2004. / Keegan, Theresa H; Chang, Ellen T.; John, Esther M.; Horn-Ross, Pamela L.; Wrensch, Margaret R.; Glaser, Sally L.; Clarke, Christina A.

In: Breast cancer research : BCR, Vol. 9, No. 5, 2007.

Research output: Contribution to journalArticle

Keegan, Theresa H ; Chang, Ellen T. ; John, Esther M. ; Horn-Ross, Pamela L. ; Wrensch, Margaret R. ; Glaser, Sally L. ; Clarke, Christina A. / Recent changes in breast cancer incidence and risk factor prevalence in San Francisco Bay area and California women : 1988 to 2004. In: Breast cancer research : BCR. 2007 ; Vol. 9, No. 5.
@article{20c3b358455042e1befa27423423ace9,
title = "Recent changes in breast cancer incidence and risk factor prevalence in San Francisco Bay area and California women: 1988 to 2004.",
abstract = "INTRODUCTION: Historically, the incidence rate of breast cancer among non-Hispanic white women living in the San Francisco Bay area (SFBA) of California has been among the highest in the world. Substantial declines in breast cancer incidence rates have been documented in the United States and elsewhere during recent years. In light of these reports, we examined recent changes in breast cancer incidence and risk factor prevalence among non-Hispanic white women in the SFBA and other regions of California. METHODS: Annual age-adjusted breast cancer incidence and mortality rates (1988 to 2004) were obtained from the California Cancer Registry and analyzed using Joinpoint regression. Population-based risk factor prevalences were calculated using two data sources: control subjects from four case-control studies (1989 to 1999) and the 2001 and 2003 California Health Interview Surveys. RESULTS: In the SFBA, incidence rates of invasive breast cancer increased 1.3{\%} per year (95{\%} confidence interval [CI], 0.7{\%} to 2.0{\%}) in 1988-1999 and decreased 3.6{\%} per year (95{\%} CI, 1.6{\%} to 5.6{\%}) in 1999-2004. In other regions of California, incidence rates of invasive breast cancer increased 0.8{\%} per year (95{\%} CI, 0.4{\%} to 1.1{\%}) in 1988-2001 and decreased 4.4{\%} per year (95{\%} CI, 1.4{\%} to 7.3{\%}) in 2001-2004. In both regions, recent (2000-2001 to 2003-2004) decreases in invasive breast cancer occurred only in women 40 years old or older and in women with all histologic subtypes and tumor sizes, hormone receptor-defined types, and all stages except distant disease. Mortality rates declined 2.2{\%} per year (95{\%} CI, 1.8{\%} to 2.6{\%}) from 1988 to 2004 in the SFBA and the rest of California. Use of estrogen-progestin hormone therapy decreased significantly from 2001 to 2003 in both regions. In 2003-2004, invasive breast cancer incidence remained higher (4.2{\%}) in the SFBA than in the rest of California, consistent with the higher distributions of many established risk factors, including advanced education, nulliparity, late age at first birth, and alcohol consumption. CONCLUSION: Ongoing surveillance of breast cancer occurrence patterns in this high-risk population informs breast cancer etiology through comparison of trends with lower-risk populations and by highlighting the importance of examining how broad migration patterns influence the geographic distribution of risk factors.",
author = "Keegan, {Theresa H} and Chang, {Ellen T.} and John, {Esther M.} and Horn-Ross, {Pamela L.} and Wrensch, {Margaret R.} and Glaser, {Sally L.} and Clarke, {Christina A.}",
year = "2007",
language = "English (US)",
volume = "9",
journal = "Breast Cancer Research",
issn = "1465-5411",
publisher = "BioMed Central",
number = "5",

}

TY - JOUR

T1 - Recent changes in breast cancer incidence and risk factor prevalence in San Francisco Bay area and California women

T2 - 1988 to 2004.

AU - Keegan, Theresa H

AU - Chang, Ellen T.

AU - John, Esther M.

AU - Horn-Ross, Pamela L.

AU - Wrensch, Margaret R.

AU - Glaser, Sally L.

AU - Clarke, Christina A.

PY - 2007

Y1 - 2007

N2 - INTRODUCTION: Historically, the incidence rate of breast cancer among non-Hispanic white women living in the San Francisco Bay area (SFBA) of California has been among the highest in the world. Substantial declines in breast cancer incidence rates have been documented in the United States and elsewhere during recent years. In light of these reports, we examined recent changes in breast cancer incidence and risk factor prevalence among non-Hispanic white women in the SFBA and other regions of California. METHODS: Annual age-adjusted breast cancer incidence and mortality rates (1988 to 2004) were obtained from the California Cancer Registry and analyzed using Joinpoint regression. Population-based risk factor prevalences were calculated using two data sources: control subjects from four case-control studies (1989 to 1999) and the 2001 and 2003 California Health Interview Surveys. RESULTS: In the SFBA, incidence rates of invasive breast cancer increased 1.3% per year (95% confidence interval [CI], 0.7% to 2.0%) in 1988-1999 and decreased 3.6% per year (95% CI, 1.6% to 5.6%) in 1999-2004. In other regions of California, incidence rates of invasive breast cancer increased 0.8% per year (95% CI, 0.4% to 1.1%) in 1988-2001 and decreased 4.4% per year (95% CI, 1.4% to 7.3%) in 2001-2004. In both regions, recent (2000-2001 to 2003-2004) decreases in invasive breast cancer occurred only in women 40 years old or older and in women with all histologic subtypes and tumor sizes, hormone receptor-defined types, and all stages except distant disease. Mortality rates declined 2.2% per year (95% CI, 1.8% to 2.6%) from 1988 to 2004 in the SFBA and the rest of California. Use of estrogen-progestin hormone therapy decreased significantly from 2001 to 2003 in both regions. In 2003-2004, invasive breast cancer incidence remained higher (4.2%) in the SFBA than in the rest of California, consistent with the higher distributions of many established risk factors, including advanced education, nulliparity, late age at first birth, and alcohol consumption. CONCLUSION: Ongoing surveillance of breast cancer occurrence patterns in this high-risk population informs breast cancer etiology through comparison of trends with lower-risk populations and by highlighting the importance of examining how broad migration patterns influence the geographic distribution of risk factors.

AB - INTRODUCTION: Historically, the incidence rate of breast cancer among non-Hispanic white women living in the San Francisco Bay area (SFBA) of California has been among the highest in the world. Substantial declines in breast cancer incidence rates have been documented in the United States and elsewhere during recent years. In light of these reports, we examined recent changes in breast cancer incidence and risk factor prevalence among non-Hispanic white women in the SFBA and other regions of California. METHODS: Annual age-adjusted breast cancer incidence and mortality rates (1988 to 2004) were obtained from the California Cancer Registry and analyzed using Joinpoint regression. Population-based risk factor prevalences were calculated using two data sources: control subjects from four case-control studies (1989 to 1999) and the 2001 and 2003 California Health Interview Surveys. RESULTS: In the SFBA, incidence rates of invasive breast cancer increased 1.3% per year (95% confidence interval [CI], 0.7% to 2.0%) in 1988-1999 and decreased 3.6% per year (95% CI, 1.6% to 5.6%) in 1999-2004. In other regions of California, incidence rates of invasive breast cancer increased 0.8% per year (95% CI, 0.4% to 1.1%) in 1988-2001 and decreased 4.4% per year (95% CI, 1.4% to 7.3%) in 2001-2004. In both regions, recent (2000-2001 to 2003-2004) decreases in invasive breast cancer occurred only in women 40 years old or older and in women with all histologic subtypes and tumor sizes, hormone receptor-defined types, and all stages except distant disease. Mortality rates declined 2.2% per year (95% CI, 1.8% to 2.6%) from 1988 to 2004 in the SFBA and the rest of California. Use of estrogen-progestin hormone therapy decreased significantly from 2001 to 2003 in both regions. In 2003-2004, invasive breast cancer incidence remained higher (4.2%) in the SFBA than in the rest of California, consistent with the higher distributions of many established risk factors, including advanced education, nulliparity, late age at first birth, and alcohol consumption. CONCLUSION: Ongoing surveillance of breast cancer occurrence patterns in this high-risk population informs breast cancer etiology through comparison of trends with lower-risk populations and by highlighting the importance of examining how broad migration patterns influence the geographic distribution of risk factors.

UR - http://www.scopus.com/inward/record.url?scp=45149125181&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=45149125181&partnerID=8YFLogxK

M3 - Article

C2 - 20210979

AN - SCOPUS:45149125181

VL - 9

JO - Breast Cancer Research

JF - Breast Cancer Research

SN - 1465-5411

IS - 5

ER -