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Table 1 Comparison of breast cancer risk factors in cabin crew vs. the general population

From: Prevalence of risk factors for breast cancer in German airline cabin crew: a cross-sectional study

Risk factor

Study population (95% confidence interval)

General population*

Body height (cm)

169.3 (169.0-169.6)

166.3

Body mass index (kg/m2)

21.8 (21.7-21.9)

24.3

Duration of OC use (years)

11.1 (10.7-11.5)

9.1

Physical activity (h/week)

3.9 (3.7-4.0)

2.6

Alcohol consumption

  

% consuming over 10 g/day

41.9

14.5

Avg. daily consumption (g)

10.6 (9.9-11.2)

6.0

Smoking

  

% of daily smokers

12.6

28.1

Avg. cigarettes per day

7.9 (7.0-8.7)

12.7

Reproductive factors

  

Nulliparity1 (%)

57.1 (54.4-59.8)

16.1

Age at first birth (years)

32.1 (31.7-32.4)

25.5

Birth rate (no. of children)

0.62 (0.58-0.67)

1.34

  1. *age adjusted.
  2. 1) only considering women aged 45 years and older.