The association between indexes related to obesity and female breast cancer

Of the four common indexes of obesity, no significant differences were found between the breast-cancer case and control groups for waist to hip ratio (WHR) (χ² = 0.121, P = 0.727) or hip circumference (HC) (χ² = 1.169, P = 0.280), but there were significant differences in the distribution of BMI (χ² = 6.603, P = 0.010) and waist circumference (WC) (χ² = 7.255, P = 0.007) (Table 2).

Table 2

Distribution of obesity-related indexes between the female breast-cancer case and control groups

When the results were stratified by different menopausal status of the women in the breast-cancer case and control groups, there were no significant differences in BMI in the pre-menopausal group, WC in the post-menopausal group, and WHR and HC in both the pre-menopausal and post-menopausal groups. However, there were significant differences in BMI for the post-menopausal group (χ² = 9.645, P = 0.008), and WC for the pre-menopausal group (χ² = 4.701, P = 0.030) (Table 3).

Table 3

Association between obesity-related indexes and female breast cancer in patients with different menopausal status