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Table 1 Participant demographics, anthropometric, metabolic, physical activity characteristics and cardiorespiratory fitness (n=402)

From: Daily physical activity predicts degree of insulin resistance: a cross-sectional observational study using the 2003–2004 National Health and Nutrition Examination Survey

Variable

Final Cohort

Range

Excluded Individuals

 

Mean ± Linearized SE (n=402)

(n=402)

Mean ± Linearized SE (n=481)

Sex (%)

   

 Male

53.0

 

49.0

 Female

47.0

 

51.0

Race (%)

   

 Non-Hispanic white

74.0

 

68.0*

 Non-Hispanic black

10.0

 

14.0*

 Mexican American

10.0

 

8.0*

 Other

7.0

 

10.0*

Smoking Status

   

 Smokers

29.0

 

37.0

 Non-smokers

71.0

 

63.0

Age (yrs.)

32.6 ± 0.56

18–49

34.0 ± 0.51*

Mass (kg)

79.7 ± 1.16

42.8–156.7

82.8 ± 0.95

BMIa (kg/m2)

26.9 ± 0.26

16.0–50.1

28.3 ± 0.29*

Body Fat (%)

31.2 ± 0.40

12.2–51.8

33.2 ± 0.42*

Fasting glucose (mmol/L)

5.1 ± 0.03

3.8–12.1

 

Fasting insulin (μU/mL)

9.4 ± 0.49

2.0–61.2

 

HOMA–IRb

2.1 ± 0.11

0.2–17.3

 

Average MVPAc (min)

32.1 ± 1.23

0.0–134.0

 

Estimated VO2maxd (ml/kg/min)

39.7 ± 0.54

21.4–78.9

 
  1. a body mass index.
  2. b homeostatic model assessment of insulin resistance.
  3. c moderate-to-vigorous physical activity.
  4. d maximal oxygen consumption.
  5. *Statistically significant difference between final cohort (n=402) with valid measures of HOMA-IR, cardiorespiratory fitness, and physical activity and those excluded due to missing or invalid data.