Table 1 Characteristics of included studies
Study (year) | Country | Age (year) | Sample size (test group) | Diagnostic method | Study design | Follow-up (year) | Adjustment for covariance |
|---|---|---|---|---|---|---|---|
Alderman et al. [24] (1986) | USA | 50–74 | 1520 (427) | No report | Case-control | 1976–1980 | Age, estrogen use, and relative weight |
Hoffman et al. [16] (1993) | USA | ≥ 45 | 348 (174) | Radiographs | Case-control | 1987–1989 | Age, hospital of recruitment, age group, and number of live births |
Cumming et al. [12] (1993) | Australia | ≥ 65 | 308 (174) | No report | Case-control | 1990–1991 | Age, body mass index, history of hormone therapy use, et.. |
Michaelsson et al. [11] (2001) | Sweden | 50–81 | 4640 (1328) | No report | Case-control | 1993–1995 | Age, hormone therapy, parity, body mass index, etc. |
Huo et al. [10] (2003) | China | ≥ 50 | 354 (118) | Radiographs | Case-control | 1994–1996 | No report |
Bjørnerem et al. [9] (2011) | Norway | 50–94 | 3748 (335) | No report | Cohort | 1974–2008 | Age, height, body mass index, smoking, alcohol use, etc. |
Crandall [15] (2017) | USA | 50–79 | 92,980 (1185) | No report | Cohort | 1993–2005 | Age, race-ethnicity, smoking status, body mass index, etc. |