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Table 1 Baseline characteristics of qualified studies in this meta-analysis

From: The Alu-insertion progesterone receptor gene polymorphism is not associated with breast cancer: a meta-analysis

Author

Year

Country

Ethnicity

Controls source

Mean age of control group

Cases, n

Controls, n

Manolitsas [36]

1997

England

Caucasian

population-based

292

220

Lancaster [25]

1998

America

Caucasian

hospital-based

68

101

Wang-Gohrke [23]

2000

Germany

Caucasian

population-based

42.9

559

554

Fabjani [24]

2002

Austria

Caucasian

population-based

155

106

Donaldson [26]

2002

America

Caucasian

population-based

23

60

Donaldson [26]

2002

America

African-American

population-based

61

81

Linhares [37]

2005

Brazil

Latino

population-based

50

49

Romano [38]

2007

Netherlands

Caucasian

hospital-based

167

31

Surekha [39]

2009

India

Indian

population-based

250

249

Gallegos-Arreola [22]

2015

Mexico

Indo - European mixed race

population-based

53.64

481

209