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Table 1 Characteristics of 54,304 study participants at baseline and NOx concentrations and traffic at their residences

From: Air pollution from traffic and cancer incidence: a Danish cohort study

Characteristic

No. (%)

Mean/median (5th-95th percentile)

Age at enrolment (years)

 

56.7/56.2 (50.7-64.2)

Gender

  

   Male

25869 (47.6%)

 

   Female

28435 (52.4%)

 

Length of education (years)

  

   < 8

17996 (33.1%)

 

   8-10

24994 (46.0%)

 

   > 10

11255 (20.7%)

 

Sport activity in leisure time

  

   No

25149 (46.3%)

 

   Yes

29123 (53.6%)

 

   Hours/week among active

 

2.4/2.0 (0.5-7.0)

Body mass index

 

26.1/25.5 (20.4-33.4)

Fruit intake (g/day)

 

176.6/140.3 (19.0-467.4)

Vegetable intake (g/day)

 

173.2/157.8 (47.8-352.7)

Alcohol intake

  

   Abstainers

1256 (2.3%)

 

   Drink alcohol

53048 (97.7%)

 

   Amount of alcohol (g/day)a

 

20.0/13.3 (1.1-65.0)

Hormone replacement therapyb

  

   Never

11835 (41.6%)

 

   Ever

16328 (57.4%)

 

   Duration of use (years)c

 

7.9/6.0 (2.0-20.0)

Smoking

  

   Never

19081 (35.1%)

 

   Former

15600 (28.7%)

 

   Current

19557 (36.0%)

 

   Intensity (g/day)d

 

16.3/14.8 (3.8-34.4)

   Duration (years)d

 

29.5/33.0 (6.0-46.0)

Environmental tobacco smoke

  

   No/low

19268 (35.5%)

 

   High

34768 (64.0%)

 

NOx at front door e (μg/m3)

 

28.4/21.9 (14.8-69.4)

Major roadf within 50 m

  

   No

49813 (91.7%)

 

   Yes

4491 (8.3%)

 

Traffic load within 200 m

(103 vehicle km/day)

 

4.7/2.6 (0.28-15.5)

  1. a Among those drinking alcohol
  2. b For 28,163 women for whom there was information on both present and past use
  3. c Among ever users
  4. d Smoking intensity and duration among ever smokers
  5. e Time-weighted average for the period 1 January 1971 to the censoring date
  6. f More than 10,000 vehicles per day