Table 1

Comparative demographic and eating disorder features for the 2005 and 2008 surveys

2005

2008


Non-Indigenous

Indigenous

Non-Indigenous

Indigenous



n = 2962

n = 85

n = 2964

n = 70



n (%)

χ2, df = 1

p

n (%)

χ2, df = 1

p


Female

1498 (51)

55 (65)

6.60

0.01

1519 (54)

36 (51)

0.001

0.80

Regular binge eating1,

2204 (6.9%)

14 (17%)

11.4

0.001f3

143 (4.8%)

6 (8.5%)

2.06

0.16f3

Regular subjective binge eating1,2

-

-

-

-

53 (1.9%)

4 (5.7%)

5.56

0.04f3

Regular1 dieting2

132 (4.5%)

8 (9.4%)

4.6

0.06

97 (3.3%)

4 (5.7%)

1.33

0.29f3

Regular1 purging2

45 (1.5%)

2 (2.4%)

n.a.

29 (1.0%)

1 (1.4%)

n.a

n.a

Unemployed or out of work for

-

-

-

126 (4.3%)

4 (5.7%)

0.36

0.35

health reasons

Mean (SD)

df, t

p

Mean (SD)

df, t

p


Age/years

45.3 (18.8)

39.2 (16.7)

3045, 2.9

0.003

46.0 (8.9)

37.4 (18.3)

3032, 3.8

< 0.001

BMI/kg/m2 (n = 2813)

26.1 (5.3)

26.6 (5.6)

2811, -.99

0.32

26.5 (5.3)

28.1 (5.6)

2754, -2.1

0.04

Median (IQ range)

Z

p

Median (IQ range)

Z

p


Annual income/x$10 K

> 5-6 (> 3-4, > 8)

> 4-5 (> 2-3, > 8)

-2.9

0.003

> 6-8 (> 3-4, > 10)

> 8-10 (> 3-4, > 10)

-0.45

0.65

Highest Education4

5 (3, 7)

4 (3, 7)

-0.22

0.826

5 (3, 7)

5 (2, 6)

-2.01

0.04

Weight/shape importance

0 (0, 3)

1 (0, 4)

-3.5

0.001

3 (0, 4)

2 (0, 4)

-1.03

0.30

Days out of role

0 (0, 0)

0 (0, 2)

-2.2

0.032

-

-

-

-


All results were adjusted for cluster sampling and weighted according to census data.

1. Current and regular was defined as the behavior occurring at least weekly over the three months prior to the interview;

2. Binge eating was described as episodes of overeating, namely eating an unusually large amount of food in one go and at the time feeling that the eating was out of control, (i.e. it could not be prevented or stopped) [16]; Subjective binge eating was when others might not agree the amount of food was unusually large [14]; Purging was described as a weight control method comprising the use of laxatives, diuretics (water tablets), or self-induced vomiting; Strict dieting was described as "going on a very strict diet", and fasting as "eating hardly anything at all for a time", both for the purpose of weight or shape control;

3. f = Fishers exact statistic

4. Highest education: 1 = still at school, 2 = Left school at 15 years or less, 3 = Left school after age 15 but still studying, 4 = Trade qualification/apprenticeship, 5 = Certificate/Diploma - one year full time or less, 6 = Certificate/Diploma - more than one year full time, 7 = Bachelor degree or higher.

Hay and Carriage BMC Public Health 2012 12:233   doi:10.1186/1471-2458-12-233

Open Data