Table 2 Adjusted odds ratios (including 95% CI) of high-risk breast cancer in a cohort of 28 765 women diagnosed with breast cancer below the age of 70 years in Denmark, 1983–1999

From: The relation between socioeconomic and demographic factors and tumour stage in women diagnosed with breast cancer in Denmark, 1983–1999

 

Odds ratio

95% confidence limits

P -value

Age

  

<0.0001

 –44 years (per year)

0.95

0.94, 0.97

 

 45–69 years (per year)

1.003

0.997, 1.009

 

Highest attained education

  

0.0060

 Basic school/high school

1

  

 Vocational training

0.92

0.85, 0.98

 

 Higher education

0.88

0.80, 0.96

 

 Unknown

0.86

0.76, 0.98

 

Occupation

  

0.5249

 Higher functionary

1.04

0.93, 1.16

 

 Lower functionary

1.07

0.96, 1.20

 

 Skilled worker

1.14

0.99, 1.32

 

 Unskilled worker

1.06

0.94, 1.19

 

 Unemployed

1.01

0.91, 1.12

 

 Pensioner

1

  

Disposable income a

  

0.0020

 –99 999 DKK

1.22

1.10, 1.34

 

 100 000–129 999 DKK

1.12

1.02, 1.23

 

 130 000–164 999 DKK

1.11

1.02, 1.21

 

 165 000–DKK

1

  

Cohabiting status

  

0.54

 Living with partner

1

  

 Single

0.98

0.91, 1.05

 

Children living at home b

  

0.18

 0

1

  

 1

0.93

0.84, 1.04

 

 2–5

1.05

0.92, 1.21

 

Housing status

  

0.22

 Owner-occupied

1

  

 Rental

0.95

0.88, 1.03

 

Size of dwelling

  

0.35

 0–99 m2

1

  

 100–124 m2

0.99

0.91, 1.08

 

 125–149 m2

0.97

0.88, 1.07

 

 150–m2

0.92

0.84, 1.02

 

Degree of urbanicity

  

<0.001

 Capital area

0.93

0.84, 1.02

 

 Suburban area

0.85

0.78, 0.93

 

 Provincial cities

1

  

 Rural areas

1.10

1.02, 1.18

 

Mammography screening

  

<0.001

 Not available

1

  

 Availablec

0.57

0.51, 0.63

 

Comorbidity d

   

 0

1

 

0.27

 1

0.94

0.83, 1.06

 

 2+

1.14

0.92, 1.43

 
  1. High-risk breast cancer: tumor size >2.0 cm, positive axillary lymph nodes, high histologic grade and estrogen receptor negative; P-values from Wald's test.
  2. aHousehold disposable income in Danish crowns (DKK) after taxation and interest adjusted for number of persons in household.
  3. bChildren aged 0–17 years.
  4. cMammography screening was offered to all women aged 50–69 years living in Copenhagen municipality from 1991, Frederiksberg municipality from 1992 and Funen County from 1994.
  5. dPresence of these disorders as defined in Charlson index was defined as an in- or outpatient contact with one of the below diagnosis from 1978 to half a year prior to the diagnosis of breast cancer; Score 1: myocardial infarction, congestive heart failure, peripheral vascular disease, cerebrovascular disease, dementia, chronic pulmonary disease, connective tissue disease, ulcer disease, mild liver disease, diabetes type1, diabetes type2; Score 2: hemiplegia, moderate to severe renal disease, diabetes with end organ damage type1, diabetes with end organ damage type2; Score 3: moderate to severe liver disease; Score 6: AIDS; All cancer related diagnoses were excluded since first primary cancers only are in DBCG.
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