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Table 1 Selected Demographic, Lifestyle, and Clinical Characteristics of Women's Health Study Participants: By Quartiles of State-Level Median Household Income

From: Cardiovascular inflammation in healthy women: multilevel associations with state-level prosperity, productivity and income inequality

  

Quartiles of State-Level Median Household Income a,b

 

WHS Participants c

N = 24,664

$20,136-$24,807

$25,257-$27,854

$28,706-$31,183

$32,181-$41,721

Demographic

     

Age, median (IQR), y

53 (49-59)

53 ± 0.1

53 ± 0.1

53 ± 0.1

52 ± 0.1

NH-White d

23,419 (95)

95

95

97

93

Non-White

1,245 (5)

5

5

3

7

   Hispanic

216 (1)

1.0

1.3

0.4

1.0

   Non-Hispanic Black

422 (2)

2.2

1.5

1.1

2.3

   Asian/Pacific Islander

327 (1)

0.5

0.9

0.8

2.4

   Other/unknown race/ethnicity

280 (1)

1.3

1.1

0.9

1.3

Lowest income (< $19,999)

1,207 (4.9)

6.6

5.6

5.1

3.5

2 ($20,000-29,999)

2,379 (9.7)

11.8

11.3

10.4

6.8

3 ($30,000-39,999)

3,426 (13.9)

15.8

16.0

14.9

10.5

4 ($40,000-49,999)

4,091 (16.6)

18.9

17.8

16.9

14.5

5 ($50,000-99,999)

10,303 (41.8)

36.8

39.3

41.5

45.8

Highest income ($100,000+)

3,258 (13.2)

10.1

10.0

11.1

18.9

Lifestyle

     

Current smoker

2,848 (12)

13

12

11

11

Exercise rarely/never

9,121 (37)

42

37

36

36

Median Daily Caloric intake, median (IQR), kCal

1675 (1350-2053)

1673 ± 10

1660 ± 6

1680 ± 6

1682 ± 6

Clinical Covariates

     

HDL-C, median (IQR), mg/dL

52 (43-62)

50 ± 0.3

51 ± 0.2

52 ± 0.2

53 ± 0.2

LDL-C, median (IQR), mg/dL

121 (100-144)

122 ± 0.7

121 ± 0.4

121 ± 0.4

121 ± 0.4

BMI, median (IQR), kg/m2

24.9 (22.5-28.3)

25.1 ± 0.1

24.8 ± 0.1

25.1 ± 0.1

24.6 ± 0.1

Systolic blood pressure category, mean ± SD, mmHg

124 ± 14

124 ± 14

123 ± 14

124 ± 14

123 ± 14

Percent with diabetes

737 (3)

4

3

3

3

Clinical Outcome Variables

     

hsCRP, median (IQR), mg/L

2.0 (0.8-4.4)

2.4 ± 0.1

2.2 ± 0.1

2.0 ± 0.1

1.8 ± 0.1

sICAM, median (IQR), ng/ml

343 (301-394)

351 ± 2

343 ± 1

343 ± 1

338 ± 1

Fibrinogen, median (IQR), mg/dL

351 (307-403)

355 ± 2

351 ± 1

350 ± 1

349 ± 1

  1. Abbreviations: BMI, Body Mass Index; IQR, inter-quartile range.
  2. a Median household income measured from 1990 U.S. Decennial Census. State-level quartiles are based on ranges of the 50 United States plus the District of Columbia.
  3. b Values are median ± standard error or mean ± standard deviation when appropriate.
  4. c Figures are No.(%) unless otherwise noted.
  5. d "Non-White" includes Black, Asian/Pacific Islander, and American Indian/Native American/Alaska Native.
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BMC Public Health

ISSN: 1471-2458

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