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Table 1 Unweighted descriptive statistics of mobile and landline samples and mobile-only subsample

From: Surveying alcohol and other drug use through telephone sampling: a comparison of landline and mobile phone samples

 

Mobile sample

Landline sample

Mobile-only subsample

Combined sample (dual-frame)

Population estimate (census data)

N (unweighted)

1002

1012

295

2014

 

Gender

     

Male

52% (49%-55%)*

37% (34%-40%)

57% (51%-63%)*

56% (53%-58%)

49%

Age group

     

18-24

20% (18%-23%)*

3% (2%-5%)

23% (18%-28%)*

12% (10%-13%)

12%

25-39

33% (30%-36%)*

15% (13%-18%)

48% (42%-54%)*

24% (22%-26%)

27%

40-49

16% (14%-18%)

18% (16%-21%)

9% (6%-12%)*

17% (15%-19%)

18%

50-64

24% (21%-26%)*

31% (28%-34%)

16% (11%-20%)*

28% (26%-30%)

24%

65+

7% (5%-9%)*

32% (29%-34%)

4% (2%-7%)*

19% (18%-21%)

18%

Region

     

Metro

72% (69%-74%)*

64% (61%-67%)

70% (65%-75%)

68% (66%-70%)

68%

Education level

     

< year 10

5% (4%-7%)*

11% (9%-13%)

6% (3%-8%)*

8% (7%-9%)

 

Year 10

13% (11%-15%)*

19% (17%-22%)

14% (10%-18%)

16% (15%-18%)

 

Completed high school

21% (19%-24%)*

17% (15%-19%)

18% (14%-23%)

19% (17%-21%)

 

Trade qualification/diploma

24% (22%-27%)

24% (22%-27%)

31% (25%-36%)

24% (23%-26%)

 

Degree or higher

35% (33%-38%)*

28% (26%-31%)

31% (26%-36%)

32% (30%-34%)

 

Outcome variables

     

Current drinker (last 12 months)

83% (80%-85%)

82% (80%-84%)

79% (75%-84%)

  

Total alcohol volume estimate (standard drinks)

317 (286-349)

279 (248-311)

357 (298-416)

  

Risky drinking (5+std drinks)

57% (54%-60%)*

41% (38%-44%)

60% (55% - 66%)*

  

Very-risky drinking (11+ std drinks)

30% (27%-33%)*

16% (13%-18%)

36% (30%-41%)*

  

Recent cannabis use

12% (10%-13%)*

3% (2%-5%)

17% (13%-22%)*

  

Lifetime cannabis use

41% (38%-44%)*

29% (26%-31%)

49% (44%-55%)*

  

Current smoker

23% (21%-26%)*

14% (12%-16%)

34% (28%-39%)*

  
  1. * Significantly different from the landline sample (based on survey-derived 95% confidence intervals).