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Table 1 Demographic characteristics of breast cancer patients and controls

From: Methylation of WT1, CA10 in peripheral blood leukocyte is associated with breast cancer risk: a case-control study

Characteristics

No. of Controls(%)

No. of Cases (%)

P Value

Age

 Mean ± SD

51.85 ± 10.31

51.75 ± 9.39

 

  < 40

82(14.7)

41(10.2)

0.02

 40-

333(59.8)

274(68.2)

  ≥ 60

142(25.5)

87(21.6)

BMI

  ≤ 18.5

35(6.3)

14(3.5)

0.12

 18.5-

274(49.2)

211(52.5)

  ≥ 24.0

248(44.5)

177(44.0)

Urban and Rural Status

 Rural

236(42.4)

232(57.7)

< 0.01

 Urban

321(57.6)

170(42.3)

Education Level

 Primary School or Below

162(29.1)

98(24.4)

0.27

 Middle School

175(31.4)

135(33.6)

 Senior School and Higher

220(39.5)

169(42.0)

Occupation Type a

 White Collar

273(49.0)

233(58.2)

0.01

 Blue Collar

284(51.0)

169(41.8)

Ethnicity

 Han

529(95.0)

386(96.0)

0.27

 Other

28(5.0)

16(4.0)

  1. a The white collar occupation referred to people work that need mental rather than physical effort, such as office, doctor, accountant, business, teacher, etc.; the blue collar occupation referred to people work as manual labor, such as worker, farmer, cleaner, etc.