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[Breast cancer mortality trend in Portugal (1955-2002)].
Acta Med Port 2007 Mar-Apr; 20(2):139-44AM

Abstract

INTRODUCTION

In the last decade there were significant changes in breast cancer mortality that is declining since the 90 s in several countries. The aim of this study was to quantify the variation of the female breast cancer mortality rates, in Portugal and in different regions of the country, considering the changes in the trends.

PATIENTS AND METHODS

Breast cancer mortality rates and the number of deaths were obtained from the World Health Organization, for the years from 1955 to 2002, and the number of deaths and population in each region were obtained from the publication Risco de Morrer em Portugal. Age-standardized rates were computed by the direct method, using the European standard population. Joinpoint regression analyses were performed to identify the years in which changes in trends have occurred, and to estimate the annual percent changes in each period, for the age groups 35-74, 35-44, 45-54, 55-64 and 65-74 years. The annual variation was computed for each Portuguese region from 1990 to 2002.

RESULTS

Breast cancer mortality rates increased 1.55%/year (95% Confidence Interval (CI): 1.43 to 1.68) between 1955 and 1992 and changed -2.02%/year (95%CI: -2.81 to -1.31) from 1992 to 2002 in women aged 35 to 74 years. No significant differences were observed in the joinpoints or the estimated annual percent changes across age strata. At a regional level, the mortality trends between 1990 and 2002 were inversely associated with the rates at the beginning of this period (r= -0.74, p <0.001), the larger decline being observed in Lisbon, with rates varying -3.58%/ year (95% CI: -5.30 to -1.48).

CONCLUSION

A decrease in breast cancer mortality has been observed in Portugal in the early 90 s, with an estimated annual percent change of -2%/year in the last decade. The decline in mortality correlated positively with the rates at the beginning of the period.

Authors+Show Affiliations

Serviço de Higiene e Epidemiologia, Faculdade de Medicina da Universidade do Porto, Porto, Brazil.No affiliation info availableNo affiliation info available

Pub Type(s)

English Abstract
Journal Article

Language

por

PubMed ID

17868519

Citation

Bastos, Joana, et al. "[Breast Cancer Mortality Trend in Portugal (1955-2002)]." Acta Medica Portuguesa, vol. 20, no. 2, 2007, pp. 139-44.
Bastos J, Barros H, Lunet N. [Breast cancer mortality trend in Portugal (1955-2002)]. Acta Med Port. 2007;20(2):139-44.
Bastos, J., Barros, H., & Lunet, N. (2007). [Breast cancer mortality trend in Portugal (1955-2002)]. Acta Medica Portuguesa, 20(2), pp. 139-44.
Bastos J, Barros H, Lunet N. [Breast Cancer Mortality Trend in Portugal (1955-2002)]. Acta Med Port. 2007;20(2):139-44. PubMed PMID: 17868519.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - [Breast cancer mortality trend in Portugal (1955-2002)]. AU - Bastos,Joana, AU - Barros,Henrique, AU - Lunet,Nuno, Y1 - 2007/06/11/ PY - 2007/9/18/pubmed PY - 2007/11/6/medline PY - 2007/9/18/entrez SP - 139 EP - 44 JF - Acta medica portuguesa JO - Acta Med Port VL - 20 IS - 2 N2 - INTRODUCTION: In the last decade there were significant changes in breast cancer mortality that is declining since the 90 s in several countries. The aim of this study was to quantify the variation of the female breast cancer mortality rates, in Portugal and in different regions of the country, considering the changes in the trends. PATIENTS AND METHODS: Breast cancer mortality rates and the number of deaths were obtained from the World Health Organization, for the years from 1955 to 2002, and the number of deaths and population in each region were obtained from the publication Risco de Morrer em Portugal. Age-standardized rates were computed by the direct method, using the European standard population. Joinpoint regression analyses were performed to identify the years in which changes in trends have occurred, and to estimate the annual percent changes in each period, for the age groups 35-74, 35-44, 45-54, 55-64 and 65-74 years. The annual variation was computed for each Portuguese region from 1990 to 2002. RESULTS: Breast cancer mortality rates increased 1.55%/year (95% Confidence Interval (CI): 1.43 to 1.68) between 1955 and 1992 and changed -2.02%/year (95%CI: -2.81 to -1.31) from 1992 to 2002 in women aged 35 to 74 years. No significant differences were observed in the joinpoints or the estimated annual percent changes across age strata. At a regional level, the mortality trends between 1990 and 2002 were inversely associated with the rates at the beginning of this period (r= -0.74, p <0.001), the larger decline being observed in Lisbon, with rates varying -3.58%/ year (95% CI: -5.30 to -1.48). CONCLUSION: A decrease in breast cancer mortality has been observed in Portugal in the early 90 s, with an estimated annual percent change of -2%/year in the last decade. The decline in mortality correlated positively with the rates at the beginning of the period. SN - 1646-0758 UR - https://www.unboundmedicine.com/medline/citation/17868519/[Breast_cancer_mortality_trend_in_Portugal__1955_2002_]_ L2 - http://www.actamedicaportuguesa.com/revista/index.php/amp/article/view/845/521 DB - PRIME DP - Unbound Medicine ER -