Socioeconomic Deprivation and Invasive Breast Cancer Incidence by Stage at Diagnosis: A Possible Explanation to the Breast Cancer Social Paradox.

In this study, we assessed the influence of area-based socioeconomic deprivation on the incidence of invasive breast cancer (BC) in France, according to stage at diagnosis. All women from six mainland French departments, aged 15+ years, and diagnosed with a primary invasive breast carcinoma between 2008 and 2015 were included (n = 33,298). Area-based socioeconomic deprivation was determined using the French version of the European Deprivation Index. Age-standardized incidence rates (ASIR) by socioeconomic deprivation and stage at diagnosis were compared estimating incidence rate ratios (IRRs) adjusted for age at diagnosis and rurality of residence. Compared to the most affluent areas, significantly lower IRRs were found in the most deprived areas for all-stages (0.85, 95% CI 0.81-0.89), stage I (0.77, 95% CI 0.72-0.82), and stage II (0.84, 95% CI 0.78-0.90). On the contrary, for stages III-IV, significantly higher IRRs (1.18, 95% CI 1.08-1.29) were found in the most deprived areas. These findings provide a possible explanation to similar or higher mortality rates, despite overall lower incidence rates, observed in women living in more deprived areas when compared to their affluent counterparts. Socioeconomic inequalities in access to healthcare services, including screening, could be plausible explanations for this phenomenon, underlying the need for further research.

Socioeconomic and geographic disparities of breast cancer incidence according to stage at diagnosis in France.

PURPOSE: Low socioeconomic background (SB) has been associated with lower breast cancer (BC) incidence and higher BC mortality. One explanation of this paradox is the higher frequency of advanced BC observed in deprived women. However, it is still unclear if SB affects similarly BC incidence. This study investigated the link between SB and early/advanced BC incidence from Loire-Atlantique/Vendee Cancer registry data (France). MATERIALS AND METHODS: Fourteen thousand three hundred fifty three women living in the geographic area covered by the registry and diagnosed with a primary BC in 2008-2015 were included. SB was approached by a combination of two ecological indexes (French European Deprivation Index and urban/rural residence place). Mixed effects logistic and Poisson regressions were used, respectively, to estimate the odds of advanced (stage ≥ II) BC and the ratio of incidence rates of early (stage 0-I) and advanced BC according to SB, overall and by age group (< 50, 50-74, ≥ 75). RESULTS: Compared to women living in affluent-urban areas, women living in deprived-urban and deprived-rural areas had a higher proportion of advanced BC [respectively, OR = 1.11 (1.01-1.22), OR = 1.60 (1.25-2.06)] and lower overall (from - 6 to - 15%) and early (from - 9 to - 31%) BC incidences rates Advanced BC incidence rates were not influenced by SB. These patterns were similar in women under 75 years, especially in women living in deprived-rural areas. In the elderly, no association between SB and BC frequency/incidence rates by stage was found. CONCLUSION: Although advanced BC was more frequent in women living in deprived and rural areas, SB did not influence advanced BC incidence. Therefore, differences observed in overall BC incidence according to SB were only due to higher incidence of early BC in affluent and urban areas. Future research should confirm these results in other French areas.

Is survival rate lower after breast cancer in deprived women according to disease stage?

BACKGROUND: Socioeconomic deprivation has been associated with lower breast cancer (BC) survival, but the influence of stage at diagnosis on this association merits further study. Our aim was to investigate this association using the Loire-Atlantique/Vendee Cancer Registry (France). METHODS: Twelve-thousand seven-hundred thirty-eight women living in the area covered by the registry and diagnosed with invasive breast carcinoma between 2008 and 2015 were included in the study. They were censored at maximal 6 years. Deprivation was measured by the French European Deprivation Index. Excess hazard and net survival were estimated for deprivation level, stage and age at diagnosis using a flexible excess mortality hazard model. RESULTS: After adjustment by stage, women living in the most deprived areas had a borderline non-significant higher excess mortality hazard (+25% (95% CI: -3%; +62%)) compared to those living in the least deprived areas. Stage-adjusted 5-year net survival differed significantly between these two subgroups (respectively, 88.2% (95% CI:85.2%-90.5%) and 92.5% (95% CI:90.6%-93.9%)). CONCLUSION: BC survival remained lower in deprived areas in France, despite universal access to cancer care. Intensification of prevention measures could help to reduce advanced BC, responsible for the majority of deaths from BC. A better understanding of remaining social disparities is crucial to implement specific interventions.

Using ecological socioeconomic position (SEP) measures to deal with sample bias introduced by incomplete individual-level measures: inequalities in breast cancer stage at diagnosis as an example.

BACKGROUND: When studying the influence of socioeconomic position (SEP) on health from data where individual-level SEP measures may be missing, ecological measures of SEP may prove helpful. In this paper, we illustrate the best use of ecological-level measures of SEP to deal with incomplete individual level data. To do this we have taken the example of a study examining the relationship between SEP and breast cancer (BC) stage at diagnosis. METHODS: Using population based-registry data, all women over 18 years newly diagnosed with a primary BC in 2007 were included. We compared the association between advanced stage at diagnosis and individual SEP containing missing data with an ecological level SEP measure without missing data. We used three modelling strategies, 1/ based on patients with complete data for individual-SEP (n = 1218), or 2/ on all patients (n = 1644) using an ecological-level SEP as proxy for individual SEP and 3/ individual-SEP after imputation of missing data using an ecological-level SEP. RESULTS: The results obtained from these models demonstrate that selection bias was introduced in the sample where only patients with complete individual SEP were included. This bias is redressed by using ecological-level SEP to impute missing data for individual SEP on all patients. Such a strategy helps to avoid an ecological bias due to the use of aggregated data to infer to individual level. CONCLUSION: When individual data are incomplete, we demonstrate the usefulness of an ecological index to assess and redress potential selection bias by using it to impute missing individual SEP.

Are disparities of waiting times for breast cancer care related to socio-economic factors? A regional population-based study (France).

The increasing number of breast cancer cases may induce longer waiting times (WT), which can be a source of anxiety for patients and may play a role in survival. The aim of this study was to examine the factors, in particular socio-economic factors, related to treatment delays. Using French Cancer Registry databases and self-administered questionnaires, we included 1,152 women with invasive non-metastatic breast cancer diagnosed in 2007. Poisson regression analysis was used to identify WTs' influencing factors. For 973 women who had a malignant tissue sampling, the median of overall WT between the first imaging procedure and the first treatment was 44 days (9 days for pathological diagnostic WT and 31 days for treatment WT). The medical factors mostly explained inequalities in WTs. Socio-economic and behavioral factors had a limited impact on WTs except for social support which appeared to be a key point. Better identifying the factors associated with increase in WTs will make it possible to develop further interventional or prospective studies to confirm their causal role in delay and at last reduce disparities in breast cancer management.

Association between premenopausal progestogen use and postmenopausal hormonal therapy in the GAZEL cohort.

OBJECTIVES: The aim of this work was to verify the existence of and characterise the relationship between premenopausal progestogen use, subsequent use of estrogen-progestogen therapy (EPT) and risk factors for breast cancer, and to describe and analyse premenopausal progestogen use among women participating in a longitudinal study. METHODS: Data came from self-administered questionnaires mailed to 2254 pre- or peri-menopausal women aged 45 years or older participating in the French GAZEL cohort and followed for 10 years. Bivariate and multivariate analyses first examined the association between progestogen use and women's and physicians' characteristics. A generalised linear model was then used to analyse the association between progestogen use and EPT use, while taking into account factors associated with progestogen use. RESULTS: Thirty-six percent of the women had used progestogens before menopause: 56% of them 19-norpregnane derivatives, and 13% 17alpha hydroxyprogesterone derivatives. They were more likely to report breast pain, a family history of breast cancer and mood changes, to be thin, to consult a gynaecologist rather than a general practitioner, to consult a female physician, and to consult often. Of the 1756 women who had reached menopause, EPT users were more likely to have used progestogens premenopausally (adjusted RR: 1.2; 95% CI: 1.1-1.3). CONCLUSIONS: Physician characteristics play an important role in the use of progestogens before menopause. Our results also suggest that women using progestogens may have a higher risk of breast cancer, that is, that progestogen use may be a confounding rather than causal factor. The analyses concerning the relationship between EPT use and breast cancer risk must take progestogen use before menopause into account, as they do other confounding factors, such as age at menarche, parity, and use of oral contraceptives.

Hot flushes, common symptoms, and social relations among middle-aged nonmenopausal French women in the GAZEL cohort.

OBJECTIVE: Many symptoms, including hot flushes (HFs) may appear during the years preceding menopause. Hypotheses to explain these symptoms include biomedical, demographic, and cultural risk factors. Social relations are also associated with various aspects of health. The aim of this study was to analyze the association between social relations and the reporting of HFs and other common symptoms among middle-aged nonmenopausal French women taking into account other factors, including biomedical characteristics. DESIGN: Data came from self-administered questionnaires mailed to 1,180 pre- or perimenopausal women aged 45 to 54 years participating in the French GAZEL cohort. Bivariate and multivariate analyses examined the association between symptoms (HFs, general, psychological, osteoarticular, and breast symptoms) and three scores of social relations (social network, social relations, and satisfaction with social relations). RESULTS: After adjustment, low social support was associated with psychological symptoms (odds ratio [OR] = 2.65; 95% CI: 1.33-5.29) and unsatisfactory social relations were associated with psychological (OR = 2.04; 95% CI: 1.49-2.79) and breast symptoms (OR = 1.38; 95% CI: 1.03-1.84). HFs were not associated with social relations but were related to common symptoms (OR = 2.80; 95% CI: 1.94-4.03). Perimenopausal women were more likely to report HF than premenopausal women (OR = 2.63; 95% CI: 1.88-3.71). CONCLUSION: Social relations were associated with psychological and breast symptoms, but not with HFs. The strong association between common symptoms and HFs suggests that biomedical factors have a greater influence than social relations on the occurrence of HFs.

Identification of women at increased risk of osteoporosis: no need to use different screening tools at different ages.

OBJECTIVES: To assess and compare various approaches for selecting women for a bone mineral density (BMD) examination in three different age groups: (1) the most commonly recommended strategy, i.e., selection based on the presence of at least one major risk factor for osteoporosis (personal history of fracture, maternal history of hip fracture, low weight, early menopause), (2) by weight, and (3) calculation of an individual risk score based on the predictive equation (logistic regression model) including the factors most predictive of osteoporosis in each age group. METHODS: Data from three population-based samples of postmenopausal women of different ages 60-70 years (n=399), 70-80 years (n=392), and 80 years or older (n=3628). Within each age group, the value of these different approaches was primarily assessed in terms of their discriminant value (sensitivity and positive predictive value (PPV)) for osteoporosis. Other women besides osteoporotic women might also be considered at high risk of fracture (and hence treated), in particular osteopenic women (T-score<-1.5) with multiple risk factors for fracture. Hence, we also estimated and compared the overall number of selected women who might be considered at high risk of fracture after BMD testing, according to selection criteria. RESULTS: In each age group and classifying a similar percentage of women at high risk, use of weight as a tool for identifying osteoporotic women has a higher sensitivity and PPV than the currently recommended approach. Increasing the cutoff for weight increases sensitivity. However, identifying the majority (around 80%) of all osteoporotic women requires testing more than half the population. Combining weight with other factors into more complex risk scores usually does not significantly improve the discriminant value of the assessment. When similar percentages of women are selected, more women with osteopenia and multiple risk factors are identified when selection is based on usual referral criteria. However, since more osteoporotic women are identified after selection by weight (higher PPV for osteoporosis), the overall number of women who might be considered at high risk of fracture after BMD testing is higher after selection by weight. CONCLUSIONS: In each age group considered, selecting women for BMD testing based on weight is the simplest and most effective screening method for identifying osteoporotic women as well as other subgroups of women who might also be considered to be at high risk of fracture.

Mode of delivery and severe stress incontinence. a cross-sectional study among 2,625 perimenopausal women.

OBJECTIVE: To estimate the prevalence of severe stress urinary incontinence (SUI) among perimenopausal women and to examine potential obstetric risk factors. DESIGN: Mail survey of female volunteers for epidemiological research. SETTING: Postal questionnaire on SUI. POPULATION: Three thousand one hundred and fourteen women aged 49-61 years who comprised the GAZEL cohort. METHODS: Logistic regression using data from the entire cohort to estimate the impact of risk factors. A second logistic regression using data from women who had given birth included obstetric history. MAIN OUTCOME MEASURE: Prevalence of severe SUI defined by the response 'often' or 'all the time' to the question 'Does urine leak when you are physically active, cough or sneeze?' RESULTS: Two thousand six hundred and twenty-five women (85%) completed and returned the questionnaire The frequency of SUI reported in the preceding four weeks was as follows: 'never' 32%, 'occasionally' 28%, 'sometimes' 26%, 'often' 10% and 'all the time' 5%. Prevalence of severe SUI was lowest among nulliparous women (7%), but it was similar among parous women regardless of birth number (14-17%). The prevalence of severe SUI was not associated with mode of delivery (14% for women delivered by caesarean only vs 16% for vaginal births). Significant risk factors for severe SUI were high body mass index (BMI >30), diabetes mellitus, previous incontinence surgery, parity and first delivery under the age of 22 years. CONCLUSION: Previous pregnancy itself is a risk factor for severe SUI among women who reach the age of 50. In this age group the impact of the mode of delivery (spontaneous, forceps or caesarean) on severe SUI is slight.

Hormone therapy use among postmenopausal French women before the publication of the Women's Health Initiative study: duration of use and factors associated with discontinuation.

OBJECTIVE: Compliance with recent recommendations concerning hormone therapy (HT) requires that we understand the reasons why women receiving HT continue or stop their treatment. Our aim was to estimate the duration of HT use and analyze factors associated with its discontinuation during the period before the publication of articles challenging the safety of HT. DESIGN: With data from 3 mail questionnaires--at inclusion (in 1990), 3 years, and 6 years--we estimated the cumulative treatment continuation rate by the actuarial method and used the Cox model to analyze the factors associated with discontinuation. SETTING: French women participating in the GAZEL cohort of employees of the French national power and electricity company (Electricité de France-Gaz de France). PATIENT(S): One thousand eighty-three postmenopausal women who were ever-HT users. INTERVENTION(S): None. MAIN OUTCOME MEASURE(S): Discontinuation of HT. RESULT(S): A total of 91.6% of women consulted gynecologists, and 88% continued treatment 5 years after they had begun it. Those reporting hot flashes as a reason for taking HT and those younger than 45 years old at menopause were less likely to stop HT, as were women reporting alcohol use. CONCLUSION(S): Our results demonstrate the importance of providing information to physicians, primarily gynecologists, to ensure appropriate treatment of symptoms for menopausal women, especially those younger than 45 years old, while bearing their long-term health in mind.

Recombinant follicle-stimulating hormone versus human menopausal gonadotropin in the late follicular phase during ovarian hyperstimulation for in vitro fertilization.

OBJECTIVE: To study the effect of exogenous LH in the late follicular phase on ongoing pregnancies and at the different stages of IVF-ET (stimulation, fertilization, and implantation) in patients with low endogenous LH. DESIGN: Retrospective cohort study with modeling of the different phases of IVF-ET. SETTING: IVF center of the teaching hospital in Bordeaux, France. PATIENT(S): Women undergoing IVF and ICSI treatment. INTERVENTION(S): One group received recombinant FSH alone (FSH group) and the other received recombinant FSH and hMG in the late follicular phase (i.e., when the largest follicle reached 14 mm) (FSH/hMG group). MAIN OUTCOME MEASURE(S): Ongoing pregnancy, number of oocytes, and number of embryos. RESULT(S): The FSH/hMG group had a higher probability of having at least one oocyte (odds ratio [OR] = 2.75 [1.11-6.80]), of having at least one embryo after oocyte retrieval (OR = 2.84 [1.33-6.07]), and of ongoing pregnancy after ET (OR = 2.04 [0.83-5.01]), and globally had a higher probability of ongoing pregnancy (OR = 2.83 [1.19-6.71]). CONCLUSION(S): In ovarian hyperstimulation for IVF-ET, LH supplementation in the late follicular phase of women with low endogenous LH is beneficial for ongoing pregnancy by increasing the rate of success of all stages of the treatment.