Do Demographic Profiles of Listed and Unlisted Households Differ? Results of a Nationwide Telephone Survey
Table 1
Odds ratios (OR) and 95% confidence intervals (CI) for association between demographic characteristics and having an unlisted telephone number.
Demographic
Unlisted
Listed
Unadjusted
Adjusteda
Characteristic
%
%
OR
95% CI
OR
95% CI
Gender
Male
458
56.9
2165
54.5
1.00
1.00
Female
347
43.1
1807
45.5
0.91
0.78–1.06
0.89
0.76–1.04
Age
18–34
179
22.4
508
12.9
1.59
1.30–1.94
1.61
1.31–1.97
35–50
408
51.1
1840
46.7
1.00
1.00
51–65
211
26.4
1589
40.4
0.60
0.50–0.72
0.62
0.52–0.74
Country of birth
Australia
593
73.8
3194
80.5
1.00
1.00
Other
210
26.2
774
19.5
1.46
1.23–1.74
1.38
1.14–1.68
Main language
English
780
97.0
3902
98.2
1.00
1.00
Other
24
3.0
70
1.8
1.72
1.07–2.74
1.00
0.60–1.66
Highest education
High school or less
286
35.6
1473
37.2
1.00
1.00
Trade certificate/diploma
195
24.2
1126
28.5
0.89
0.73–1.09
0.91
0.75–1.12
Bachelor degree or higher
323
40.2
1358
34.3
1.23
1.03–1.46
1.17
0.97–1.41
Socioeconomic statusb
Highest quintile
228
28.3
1102
27.7
1.00
1.00
4th quintile
207
25.7
998
25.1
1.00
0.82–1.23
1.05
0.85–1.31
3rd quintile
165
20.5
798
20.1
1.00
0.80–1.25
1.22
0.96–1.55
2nd quintile
110
13.7
698
17.6
0.76
0.60–0.97
1.00
0.76–1.30
Lowest quintile
95
11.8
376
9.5
1.22
0.94–1.59
1.44
1.07–1.94
Remotenessc
Major city
553
68.7
2371
59.7
1.00
1.00
Inner regional
173
21.5
1127
28.4
0.66
0.55–0.79
0.68
0.56–0.84
Outer regional
69
8.6
409
10.3
0.72
0.55–0.95
0.64
0.47–0.87
Remote/very remote
10
1.2
65
1.6
0.66
0.34–1.29
0.56
0.27–1.17
State
Victoria
173
21.5
677
17.1
1.00
1.00
New South Wales
189
23.5
1002
25.2
0.74
0.59–0.93
0.72
0.57–0.92
Queensland
93
11.5
437
11.0
0.83
0.63–1.10
0.75
0.56–1.00
Western Australia
241
29.9
1430
36.0
0.66
0.53–0.82
0.63
0.50–0.78
South Australia
27
3.4
83
2.1
1.27
0.80–2.03
1.01
0.62–1.65
Australian Capital Territory
17
2.1
72
1.8
0.92
0.53–1.61
1.08
0.60–1.93
Tasmania
11
1.4
41
1.0
1.05
0.53–2.09
1.61
0.76–3.43
Northern Territory
54
6.7
230
5.8
0.92
0.65–1.29
0.80
0.56–1.14
Mutually adjusted analysis.
bBased on Socio-Economic Indexes For Areas Index of Relative Socio-Economic Disadvantage (SEIFA IRSD); highest quintile comprises least disadvantaged.
cBased on Accessibility/Remoteness Index of Australia (ARIA+).
