Skip to main content

Table 1 Descriptive characteristics of breast cancer patients in WCHS with methylation data

From: An epigenome-wide analysis of socioeconomic position and tumor DNA methylation in breast cancer patients

 

Income (≤ 50,000) n = 245

Income (> 50,000) n = 314

Age at diagnosis

  

 Mean ± std

52.8 ± 11.4

50.5 ± 9.8

 45 below

63 (25.7)

85 (27.1)

 45–55

73 (29.8)

125 (39.8)

 56–65

81 (33.1)

86 (27.4)

 66–75

28 (11.4)

18 (5.7)

BMI (kg/m2)a

  

 Mean ± std

29.6 ± 8.3

27.5 ± 6.9

 < 25.0 (normal)

54 (22.7)

115 (37.1)

 25–29.9 (overweight)

73 (30.7)

97 (31.3)

 ≥ 30.0 (obesity)

111 (46.6)

98 (31.6)

Menopausal status

  

 Yes

108 (44.1)

180 (57.3)

 No

137 (55.9)

134 (42.7)

Family history

  

 Yes

40 (16.3)

61 (19.4)

 No

205 (83.7)

253 (80.6)

Age at first birthb

  

 Mean ± std

22.4 ± 5.6

26.9 ± 6.1

 20 below

68 (35.6)

25 (11.3)

 20–30

100 (52.4)

128 (57.9)

 30–40

22 (11.5)

66 (29.9)

 40 above

1 (0.5)

2 (0.9)

ER status

  

 Negative

62 (25.3)

67 (21.3)

 Positive

183 (74.7)

247 (78.7)

Race

  

 AA

180 (73.5)

120 (38.2)

 EA

65 (26.5)

194 (61.8)

Education

  

 Below high school

30 (12.2)

3 (0.9)

 High school or equal

97 (39.6)

57 (18.2)

 College

62 (25.3)

61 (19.4)

 College graduate

42 (17.1)

106 (33.8)

 Postgraduate and above

14 (5.7)

87 (27.7)

  1. WCHS, Women’s Circle of Health Study; BMI, body mass index; AA, African-American; EA, European American
  2. a7 cases in low family income group missing BMI information and 4 cases in higher family income group missing BMI information
  3. b54 cases in low family income group missing age at first birth information and 93 cases in higher family income group missing age at first birth information
Back to article page

Clinical Epigenetics

ISSN: 1868-7083

Contact us