Table 1 Participant characteristics, stratified by age group.

From: Dietary glycaemic index and glycaemic load among Australian adults – results from the 2011–2012 Australian Health Survey

 

19–30 years

31–50 years

51–70 years

71 + years

1p value

n

1523

2345

1792

666

—

BMI (kg/m2)2

24.8 ± 4.8

26.9 ± 5.0

28.2 ± 5.1

27.2 ± 4.7

<0.001

Under weight (%)

3.5

1.1

1.2

1.5

<0.001

Normal weight (%)

55.8

37.7

26.9

30.0

Overweight (%)

29.0

38.8

40.5

45.1

Obese (%)

11.7

22.4

31.4

23.3

Male (%)

56.0

52.7

51.3

46.4

0.006

Living in urban area (%)

79.1

72.8

63.7

69.7

<0.001

Proportion in the highest SEIFA quintile (%)

23.3

25.3

22.5

19.2

0.013

Proportion in the highest decile of household income (%)3

10.6

14.8

12.7

2.8

<0.001

Born in Australia (%)

70.5

68.0

68.3

71.8

0.135

  1. Values were presented as mean ± SD for continuous variables and as percentages for categorical variables. Data were weighted to account for over- or under-sampling to enable representation of the general Australian population, and the n reported in the table represent the weighted sample. SEIFA - Socio-Economic Indexes for Areas, a measure of socioeconomic status defined by the Australian Bureau of Statistics, where a higher SEIFA indicate socio-economic advantage46.
  2. 1p values represent p for trend across age groups tested by linear regression for continuous variables, and for categorical variables the p values were tested by χ2 test.
  3. 2n = 1522, 2340, 1787, 649 respectively due to missing data.
  4. 3n = 1184, 2227, 1649, 598 respectively due to missing data.
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