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Table 2 Comparison of demographics of respondents with and without fixed line telephone and internet access

From: Is web interviewing a good alternative to telephone interviewing? Findings from the International Tobacco Control (ITC) Netherlands Survey

 

Web sample (n = 1,668)

Telephone sample (n = 404)

 

With telephone

(n = 1,438)

Without telephone

(n = 230)

Significance

tests

With internet

(n = 359)

Without internet

(n = 45)

Significance

tests

Gender (%)

  

χ2 = 0.15

  

χ2 = .74

Men

52.4

53.9

(df = 1)

55.8

48.8

(df = 1)

Women

47.6

46.1

 

44.2

51.2

 

Marital status (%)

  

χ2 = 39.63***

  

χ2 = 27.93***

Not married

41.5

63.3

(df = 3)

44.0

40.0

(df = 3)

Married

50.4

28.0

 

49.5

37.5

 

Widowed

2.2

1.4

 

2.5

20.0

 

Divorced

6.0

7.2

 

4.1

2.5

 

Educational level (%)

  

χ2 = 8.78*

  

χ2 = 26.29***

Low

51.9

43.0

(df = 3)

31.0

70.7

(df = 3)

Middle

34.9

37.2

 

50.0

24.4

 

High

12.5

18.8

 

15.2

2.4

 

No answer

0.7

1.0

 

3.8

2.4

 

Age (mean; SD)

43.3; 14.7

35.3; 12.3

t = -8.53***

41.1; 13.6

57.1; 17.4

t = 5.66***

  1. * p < 0.05
  2. ** p < 0.01
  3. *** p < 0.001