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Table 1 Selected age-standardized characteristics of the Nurses’ Health Study participants throughout follow-up 6/2000-5/2006

From: The association of long-term exposure to PM2.5 on all-cause mortality in the Nurses’ Health Study and the impact of measurement-error correction

Characteristic

Mean (SD) or %

Na

108,767

Person-yearsa

628,186

Age (in years)a

69.0 (7.3)

Caucasian race

94

BMI (kg/m2)

25.8 (7.4)

Average PM2.5 over the previous 12 months

 

Spatio-temporal model

12.0 (2.8)

Nearest USEPA monitor

12.7 (3.1)

Smoking status

 

  Never

44

  Former

45

  Current

10

Pack-yearsb

24.3 (21.8)

Physical activity (MET hr/week)

 

  <3

23

  3 to <9

21

  9 to <18

18

  18 to <27

11

  > = 27 MET

19

Alternative Healthy Eating Index

175 (95)

Hypertension

53

Hypercholesterolemia

61

Diabetes

11

Individual level SES

 

     RN degree

73

     Housewife mother at age 16

64

     Professional or manager father at age 16

26

     Married

64

     Husband’s education

 

      less than high school

4

      high school

26

      greater than high school

35

Census tract SES

 

     Median home value ($1,000)

170.2 (124.9)

     Median income ($1,000)

63.4 (24.4)

  1. aValue not age adjusted.
  2. bAmong ever smokers only.