Skip to main content

Table 1 Main characteristics of the included studies in our-analysis

From: Does hypothyroidism increase the risk of breast cancer: evidence from a meta-analysis

Study Year Region Sample Median/Mean age Follow-up Study design NOS
(years) (years)
Adami 1978 Sweden 358 64 1 Case-control 7
Kalache 1982 UK 2352 NA 11 Case-control 6
Hoffman 1984 Sweden 1665 47.2 21.9 Cohort 8
Brinton 1984 USA 2612 NA 4 Case-control 7
Moseson 1993 Canada 1101 54 4 Case-control 7
Smyth 1996 Ireland 400 57.2 ± 1.4 1 Case-control 7
Shering 1996 Ireland 350 NA NA Case-control 7
Talamini 1997 Italy 5157 55 3 Case-control 7
Simon 2002 USA 9257 NA 4 Case-control 6
Turken 2003 Prague 250 63 4 Case-control 6
Kuijpens 2005 Netherlands 2775 50.5 9 Cohort 8
Cristofanilli 2005 USA 2224 51.6 ± 12.6 3 Case-control 6
Sandhu 2009 Canada 179,462 74.9 ± 7 10 Cohort 8
Hellevik 2009 Norwegian 29,691 ≥20 9 Cohort 7
Ditsch 2010 Germany 130 58.6 ± 13.5 NA Case-control 7
Grani 2012 Italy 380 59 5 Case-control 7
Søgaard 2016 Danish 61,873 71 35 Cohort 7
Weng 2018 USA 103,466 53.3 NA Case-control 8
Kim 2019 Korea 67,416 ≥40 4 Cohort 8
\