Table 1.
Characteristics of studies with breast cancer incidence as an outcome
| Author, year (location) | Incidence measure | Socioeconomic measure (number of groups) | Covariates | Population | Data source | Study design | Statistical method |
|---|---|---|---|---|---|---|---|
| Meijer et al.17, 2013 (Denmark) | Not specified | Education (3), household income (4), occupation (10) | Age, invitation to mammography screening, marital status, residential factors | 1 539 162 women | Statistics Denmark, National Cancer Register | Cohort study | Shared frailty model |
| Beiki et al.14, 2012 (Sweden) | Invasive | Education (3) | Age, ethnicity, parent’s ethnicity | 4 553 484 women | National Cancer Registry, LISA database, Multi-Generation Register, Cause of Death Register | Cohort study | Poisson model |
| Petracci et al.18, 2011 (Italy) | Invasive | Education (3) | Age, family history of breast cancer, previous breast biopsies, age at first birth, age at menarche, physical activity, alcohol, BMI | 2523 women with breast cancer and 2504 control subjects | Structured interviews at major hospitals in six Italian regions | Case-control study | Logistic model |
| Villeneuve et al.20, 2011 (France) | Invasive and in situ combined | Education (4) | Age, study area, hormone replacement therapy, family history of breast cancer, history of benign breast disease, parity, age at first birth, duration of breastfeeding, age at menarche, BMI | 1230 women with breast cancer and 1315 control subjects | Structured interviews at hospitals in two French regions | Case-control study | Logistic model |
| Larsen et al.16, 2011 (Denmark) | Not specified | Education (3), income (4), occupation (7) | Age, hormone replacement therapy, parity, age at first birth, alcohol, BMI | 23 111 women | National Cancer Registry, IDA database, Diet, Cancer & Health cohort study | Cohort study | Cox proportional hazard model |
| Carlsen et al.15, 2008 (Denmark) | Invasive | Education (3), household income (3), occupation (6) | Age, time period | 1 589 789 women | National Cancer Register, National Patient Register, IDA database, Central Population Register | Cohort study | Poisson regression |
| Vidarsdottir et al.19, 2008 (Iceland) | Not specified | Education (3) | Age, time period | 58 505 women | The 1981 Census, National Cancer Registry | Cohort study | SIR |
| Hussain et al.38, 2008 (Sweden) | Invasive and in situ separately | Education (4) | Age, time period, family history of breast cancer, parity, age at first birth, residential factors | 1 571 511 women | National Family-Cancer Database, Cause of Death Register | Cohort study | Cox proportional hazard model |