Do socio-demographic factors influence mammography use of French women? Analysis of a French cross-sectional survey

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Abstract
The aim of this study was to analyse the independent role of socio-demographic factors on the use of mammography according to whether or not an organized breast cancer screening programme exists. The study sample of 2825 women aged 40–74 years was drawn from a cross-sectional population-based survey of French households. Among these women 46% lived in districts that offered a screening programme and 63% reported undergoing mammography in the previous 2 years. Living in a district that offered a screening programme was associated with increased use of mammography. According to both univariate and multivariate analysis, several socio-demographic characteristics, such as high monthly household income or high education level, increased the probability of using mammography. However, three factors had a major positive impact on its use: (1) having had a gynaecological examination in the previous 2 years, (2) living in a district where a screening programme was available, and (3) age. There was a significant interaction between the factors 2 and 3. Between 40 and 60 years, age had the same impact on the use of mammography whether or not women lived in a district with a screening programme. After the age of 60 years, the use of mammography collapsed among women living in a district without a screening programme and remained frequent among women living in the district that offered such a programme. Even if the overall level of mammography screening was high and the existence of a screening programme maintained a high level of mammography use among older women, the programme should target better the women of underprivileged spheres and reinforce the role of the general practitioner; in particular for women not followed by a gynaecologist.