Relationship of Age at First Live Birth, Parity and Duration of Breast Feeding with Non Familial Breast Cancer in Pakistani Women. A Study of the Cancer Research Group Pakistan.

Abstract

Background and objectives; This multicenter case control study is being conducted at seven different centers in Pakistan in order to find out the association and relationship of different hormonal and reproductive factors with breast cancer. These factors have been identified either as risk factors or protective factors for breast cancer in other communities but not in Pakistani women. Preliminary results from four centers are being reported here.Method; Patients attending these cancer treatment centers were interviewed by the trained medical personals and the findings were recorded in a proforma. Age and area matched unrelated controls were randomly selected and interviewed with same questions and findings were recorded in a corresponding proforma. SPSS version 11.5 was used for statistical analysis.Results; From June, 2008 to May, 2009 six hundred eighty eight cases were compared with an equal number of controls. Median age of cases was 47 years (26-70 years) and controls 47.5 years (25-71 years). One hundred ninety eight of cases (28.78%) and 208 of controls (30.23 %) gave first full term live birth before the age of 20. Sixty two cases (09.01%) and 38 controls (5.52%) gave first full term live birth after the age of 30. Seventy one cases and 65 controls were nulliparous.Fifty cases (07.27%) and 51 controls (07.41%) had only one child whereas 104 (15.12%) cases and 118 controls (17.15%) had more then 7 children.Breast feeding duration was more then 24 months in 410 (72.31%) of all women who had more then 1 child. Duration of breast feeding in cases Vs. control in women with 2-4 children, 5-7 children and more then 7 children was similar. Statistical analysis reveals that first live birth below the age of 20 and duration of breast feeding of greater then 24 months duration are not associated as protective factors in this patient population. Odds ratio of 1.35, 95% CI; 1.01-1.70 and 1.014, 95% CI; 0.80-1.22 respectively. Age at first live birth after 30 years of age seems to be positively associated with breast cancer. Odds ratio of 1.75, 95% CI; 1.15-2.65. These results do not support the young age at first full term pregnancy and prolonged duration of breast feeding as protective factors against the breast cancer.Key Words: Breast Cancer, Breast feeding, Parity, Risk Factor Citation Information: Cancer Res 2009;69(24 Suppl):Abstract nr 2071.

Risk Factors of Breast Cancer in the Eastern Mediterranean Region: A Systematic Review and Meta-Analysis

“…Finally, thirty (Aboudaoud, 1971;Henquin et al, 1994;Potashnik et al, 1999;Nustas et al, 2002;Alothaimeen et al, 2004;Gilani and Kamal, 2004;Yavari et al, 2005;Fakri et al, 2006;Lerner et al, 2006;Shaham et al, 2006;Faheem et al, 2007;Shema et al, 2007;Naieni et al, 2007;Mahouri et al, 2007;Katz et al, 2008;Peled et al, 2008;Montazeri et al, 2008;Saadat et al, 2008;Saleh et al, 2008;Ahmad et al, 2009;Calderon et al, 2009;Majid et al, 2009;Awatef et al, 2010;Abdulbari et al, 2010;Bidgoli et al, 2011;Ghiasvand et al, 2011;Hajian and Ahangar, 2011;Javed et al, 2011;Kloong et al, 2011;Tehranian et al, 2011) eligible studies included in the meta-analysis after quality assessment (Table 2 and Figure 1). Twenty five case-control studies, one nested case-control and four cohort studies were included.…”