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Table 1 Demographic Characteristics of Consenters and Non-consenters (N = 25,541)

From: Consent to data linkage in a large online epidemiological survey of 18–23 year old Australian women in 2012–13

Variables

N

 

Consenters

N = 17,684

Non-consenters

N = 7857

Chi-square

p value

Recruitment

 Facebook

20,120

%

67

33

< 0.01

 Other Web activities

1032

%

70

30

 Referral

959

%

71

29

 Traditional media

562

%

77

23

 Fashion promotion

2842

%

84

16

Incentive and data linkage information

 1. AUD50 with basic information

13,664

%

61

39

< 0.01

 2. Leggings with basic and additional information

11,877

%

79

21

Age group

 18 to 20 years

13,432

%

68

32

< 0.01

 21 to 23 years

12,109

%

70

30

Area of residence

 Major cities

14,800

%

76

24

< 0.01

 Inner regional

3341

%

75

25

 Outer regional

1358

%

75

25

 Remote or very remote

237

%

70

30

 Missing area

5805

%

47

53

Highest level of education

 Less than Year 12

2123

%

68

32

0.51

 Year 12

11,014

%

69

31

 Certificate or diploma

6822

%

70

30

 University

5565

%

69

31

Managing on available income is

 Impossible

1208

%

67

33

< 0.01

 Difficult all the time

5253

%

71

29

 Difficult some of the time

9000

%

70

30

 Not too bad

7331

%

68

32

 Easy

2708

%

69

31

Partnered

 No partner

18,577

%

69

31

0.02

 Partner

6627

%

70

30

Living with parents

 Yes

13,282

%

68

32

< 0.01

 No

12,247

%

71

29

Living with other adults

 Yes

4577

%

73

27

< 0.01

 No

20,952

%

68

32

  1. Missing was less than 2% for consenters and non-consenters for all variables except area of residence.