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Table 2 Proportion of people living in mobile only households by selected demographic, health conditions, and health related risk factors from 2006 to 2008

From: Sampling and coverage issues of telephone surveys used for collecting health information in Australia: results from a face-to-face survey from 1999 to 2008

  

2006

  

2007

  

2008

 

Test for trend

 

n

% (95% CI)

P value1

n

% (95% CI)

P value1

n

% (95% CI)

P value1

P value2

DEMOGRAPHICS

          

Gender

  

0.007

  

< 0.001

  

0.149

 

Male

92/1460

6.3 (5.2 - 7.7)

 

109/1222

8.9 (7.4 - 10.6)

 

131/1382

9.4 (8.0 - 11.1)

 

0.002

Female

62/1509

4.1 (3.2 - 5.2)

 

68/1285

5.3 (4.2 - 6.7)

 

114/1433

7.9 (6.6 - 9.4)

 

< 0.001

Age Groups

  

< 0.001

  

< 0.001

  

< 0.001

 

15 to 29 years

73/708

10.4 (8.3 - 12.8)

 

73/587

12.7 (10.2 - 15.7)

 

114/571

17.9 (15.2 - 20.9)

 

< 0.001

30 to 44 years

47/777

6.1 (4.7 - 8.1)

 

67/644

10.5 (8.4 - 13.2)

 

76/693

11.0 (8.9 - 13.6)

 

0.001

45 years and over

34/1485

2.3 (1.6 - 3.2)

 

38/1276

3.0 (2.2 - 4.0)

 

43/1420

3.0 (2.2 - 4.0)

 

0.213

Country of Birth

  

0.935

  

0.001

  

< 0.001

 

Australia

116/2197

5.3 (4.4 - 6.3)

 

152/1911

8.0 (6.8 - 9.3)

 

209/2110

9.9 (8.7 - 11.3)

 

< 0.001

UK & Ireland

17/354

4.9 (3.1 - 7.7)

 

5/242

1.9 #

 

6/296

2.1 (1.0 - 4.5)

 

0.040

Other

21/418

5.0 (3.3 - 7.5)

 

20/354

5.8 (3.8 - 8.7)

 

29/409

7.0 (4.9 - 9.8)

 

0.218

Marital status a

  

< 0.001

  

< 0.001

  

< 0.001

 

Married/defacto

66/1862

3.5 (2.8 - 4.5)

 

53/1534

3.5 (2.7 - 4.5)

 

111/1765

6.3 (5.2 - 7.5)

 

< 0.001

Separated/divorced

24/248

9.6 (6.5 - 13.9)

 

36/227

16.0 (11.8 - 21.3)

 

27/237

11.3 (7.8 - 15.9)

 

0.560

Widowed

3/156

1.6 #

 

4/141

3.1 #

 

5/149

3.6 (1.6 - 7.9)

 

0.286

Never married

62/694

8.9 (7.0 - 11.2)

 

83/602

13.8 (11.3 - 16.8)

 

101/661

15.2 (12.6 - 18.1)

 

< 0.001

Educational Attainment b

  

0.007

  

< 0.001

  

0.002

 

None to secondary schooling

81/1385

5.8 (4.7 - 7.2)

 

107/1234

8.7 (7.2 - 10.4)

 

134/1281

10.4 (8.9 - 12.2)

 

< 0.001

Trade qualifications,

Certificate, Diploma

64/1086

5.8 (4.6 - 7.4)

 

60/843

7.1 (5.6 - 9.1)

 

82/1015

8.1 (6.6 - 9.9)

 

0.042

Bachelor Degree or higher

10/488

2.1 (1.1 - 3.8)

 

10/428

2.4 (1.3 - 4.3)

 

27/514

5.2 (3.6 - 7.5)

 

0.005

Area of residence

  

0.089

  

< 0.001

  

< 0.001

 

Metropolitan

101/2123

4.8 (3.9 - 5.8)

 

107/1847

5.8 (4.8 - 7.0)

 

160/2152

7.4 (6.4 - 8.6)

 

< 0.001

Country

53/846

6.3 (4.8 - 8.1)

 

70/660

10.6 (8.5 - 13.2)

 

84/663

12.6 (10.3 - 15.4)

 

< 0.001

Annual household income

  

0.001

  

0.001

  

0.001

 

Up to $20,000

25/387

6.5 (4.4 - 9.4)

 

38/335

11.2 (8.3 - 15.1)

 

34/342

9.8 (7.1 - 13.4)

 

0.105

$20,001-$40,000

42/509

8.2 (6.1 - 10.9)

 

33/437

7.6 (5.5 - 10.5)

 

44/431

10.2 (7.7 - 13.4)

 

0.297

$40,001-$60,000

24/451

5.3 (3.6 - 7.8)

 

28/383

7.2 (5.0 - 10.2)

 

41/353

11.7 (8.8 - 15.5)

 

< 0.001

$60,001-$80,000

11/350

3.1 (1.7 - 5.4)

 

22/274

8.0 (5.3 - 11.8)

 

23/326

7.0 (4.7 - 10.3)

 

0.027

$80,001 or more

20/675

2.9 (1.9 - 4.5)

 

22/600

3.7 (2.5 - 5.5)

 

42/784

5.4 (4.0 - 7.2)

 

0.018

Not stated

33/597

5.6 (4.0 - 7.7)

 

34/477

7.2 (5.2 - 9.9)

 

61/580

10.4 (8.2 - 13.1)

 

0.002

Work status c

  

< 0.001

  

< 0.001

  

< 0.001

 

Work full time

69/1109

6.2 (4.9 - 7.8)

 

76/920

8.2 (6.6 - 10.2)

 

109/1091

10.0 (8.4 - 11.9)

 

0.001

Work part time

30/566

5.2 (3.7 - 7.4)

 

27/455

5.9 (4.1 - 8.5)

 

40/494

8.2 (6.1 - 10.9)

 

0.055

Home Duties

16/272

5.7 (3.5 - 9.2)

 

28/255

10.9 (7.7 - 15.4)

 

26/227

11.6 (8.1 - 16.5)

 

0.019

Unemployed

16/79

20.9 (13.4 - 31.1)

 

22/76

28.6 (19.7 - 39.6)

 

19/77

24.1 (15.9 - 34.8)

 

0.634

Retired

3/578

0.6 #

 

6/505

1.2 (0.6 - 2.6)

 

10/575

1.8 (1.0 - 3.2)

 

0.068

Student

9/220

4.1 (2.2 - 7.6)

 

9/217

4.2 (2.2 - 7.7)

 

23/227

10.0 (6.7 - 14.6)

 

0.009

Other/Not working because

of work related injury

11/104

10.8 (6.2 - 18.2)

 

10/79

12.3 (6.8 - 21.3)

 

15/123

12.3 (7.6 - 19.3)

 

0.735

SEIFA IRSD Quintiles d

  

0.001

  

< 0.001

  

< 0.001

 

Lowest/low (most

disadvantaged)

90/1293

7.0 (5.7 - 8.5)

 

118/1124

10.5 (8.9 - 12.4)

 

159/1247

12.7 (11.0 - 14.7)

 

< 0.001

Middle

25/578

4.3 (2.9 - 6.3)

 

31/496

6.3 (4.5 - 8.8)

 

31/520

5.9 (4.2 - 8.3)

 

0.314

High/Highest (least

disadvantaged)

39/1088

3.6 (2.6 - 4.9)

 

25/882

2.8 (1.9 - 4.1)

 

55/1048

5.3 (4.1 - 6.8)

 

0.017

HEALTH CONDITIONS

AND HEALTH RELATED

RISK FACTORS

          

Diabetes

13/197

6.4 (3.8 - 10.8)

0.413

6/168

3.3 (1.5 - 7.3)

0.051

24/214

11.0 (7.5 - 15.9)

0.181

0.053

Arthritis

18/694

2.6 (1.6 - 4.0)

< 0.001

27/595

4.6 (3.2 - 6.5)

0.006

31/707

4.3 (3.1 - 6.1)

< 0.001

0.092

Osteoporosis

2/184

1.3 #

0.013

6/168

3.3 (1.5 - 7.3)

0.051

3/158

2.1 #

0.002

0.618

Asthma (current)

37/364

10.1 (7.4 - 13.6)

< 0.001

31/290

10.7 (7.7 - 14.8)

0.009

47/385

12.1 (9.2 - 15.8)

0.009

0.377

Smoking status e

  

< 0.001

  

< 0.001

  

< 0.001

 

Non/Ex smoker

78/2357

3.3 (2.7 - 4.1)

 

87/2009

4.3 (3.5 - 5.3)

 

138/2264

6.1 (5.2 - 7.2)

 

< 0.001

Current smoker

76/611

12.4 (10.1 - 15.3)

 

90/495

18.2 (15.1 - 21.9)

 

106/551

19.2 (16.2 - 22.7)

 

0.002

Body mass index (BMI) f

  

0.058

  

< 0.001

  

0.049

 

Underweight <18.5

3/64

4.8 #

 

14/76

18.9 (11.7 - 29.1)

 

4/63

5.7 #

 

0.998

Normal 18.5-24.9

65/1144

5.7 (4.5 - 7.2)

 

79/925

8.5 (6.9 - 10.5)

 

99/1005

9.8 (8.2 - 11.8)

 

< 0.001

Overweight 25.0-29.9

28/848

3.3 (2.3 - 4.7)

 

47/769

6.1 (4.6 - 8.0)

 

52/820

6.4 (4.9 - 8.2)

 

0.005

Obese 30.0+

33/565

5.9 (4.2 - 8.2)

 

20/471

4.2 (2.7 - 6.4)

 

46/560

8.3 (6.3 - 10.8)

 

0.081

Overall

154/2969

5.2 (4.5 - 6.1)

 

177/2507

7.1 (6.1 - 8.1)

 

244/2816

8.7 (7.7 - 9.8)

 

< 0.001

  1. 1 p values that are bold denotes statistical significance at the 0.05 level from the X2 test for that variable;
  2. 2 p values that are bold denotes statistical significance at the 0.05 level from the X2 test for trend for the 2006 to 2008 time period for that category; CI confidence interval of proportion
  3. a10 cases missing for 2006, 4 cases missing for 2007 and 7 cases missing for 2008; b9 cases missing for 2006, 1 case missing for 2007 and 9 cases missing for 2008; c42 cases missing for 2006, 1 case missing for 2007 and 10 cases missing for 2008; d10 cases missing for 2006, 5 cases missing for 2007; e2 cases missing for 2006, 2 cases missing for 2007; f348 cases missing for 2006, 265 cases missing for 2007 and 369 cases for 2008
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