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Table 1 Cases and controls in Carolina Breast Cancer Study (CBCS) analytic datasets by race

From: Birthweight, parental age, birth order and breast cancer risk in African-American and white women: a population-based case–control study

  

African-American

White

Analytic dataset

Main exposure

Cases (%)

Controls (%)

Cases (%)

Controls (%)

CBCS, entire

Birth order

335 (100.0)

332 (100.0)

526 (100.0)

458 (100.0)

CBCS, born 1948 or later

 

131 (39.1)

135 (40.7)

235 (44.7)

181 (39.5)

   Maternal age dataset

Birth order, Maternal age

107 (31.9)

116 (34.9)

173 (32.9)

121 (26.4)

   Paternal age dataset

Paternal age

95 (28.4)

100 (30.1)

171 (32.5)

118 (25.8)

CBCS, NC born 1949 or later

 

99 (29.6)

96 (28.9)

112 (21.3)

85 (18.6)

   Birthweight, full dataset

Birthweight

86 (25.7)

89 (26.8)

110 (20.9)

78 (17.0)

   Birthweight, restricted dataset

Birthweight

49 (14.6)

37 (11.1)

98 (18.6)

63 (13.8)