Table 1. Characteristics of studies about radial scars and breast cancer included in the meta-analysis.
| Author | Year | Population | Design | Mean follow up time (Year) | Cases | Controls | ||
| Radial Scars | No radial scars | Radial scars | No radial scars | |||||
| Aroner [6] | 2013 | NHS | Nested case-control | 9.7 | 55 | 405 | 112 | 1680 |
| Kabat [29] | 2010 | Ca, USA, UK | Nested case-control | 15.4 | 13 | 602 | 21 | 603 |
| Berg [28] | 2008 | Mayo Clinic | Retrospective cohort | 15 | 52 | 669 | 387 | 8154 |
| Sanders [27] | 2006 | NBC | Retrospective cohort | 20.4 | 73 | 532 | 807 | 8144 |
| Shaaban [26] | 2002 | British | Case-control | 5.6 | 1 | 119 | 19 | 363 |
Notes: NHS: Nurses’ Health Studies; NBC: Nashville Breast Cohort; Ca: Canada; Cases: patients with subsequent breast cancer; Controls: patients without subsequent breast cancer.