Table 1: Odds ratios (OR) and 95% confidence intervals (CI) for association between demographic characteristics and having an unlisted telephone number.

DemographicUnlistedListedUnadjustedAdjusteda
Characteristic % %OR95% CIOR95% CI

Gender
 Male45856.9216554.51.001.00
 Female34743.1180745.50.910.78–1.060.890.76–1.04
Age
 18–3417922.450812.91.591.30–1.941.611.31–1.97
 35–5040851.1184046.71.001.00
 51–6521126.4158940.40.600.50–0.720.620.52–0.74
Country of birth
 Australia59373.8319480.51.001.00
 Other21026.277419.51.461.23–1.741.381.14–1.68
Main language
 English78097.0390298.21.001.00
 Other243.0701.81.721.07–2.741.000.60–1.66
Highest education
 High school or less28635.6147337.21.001.00
 Trade certificate/diploma19524.2112628.50.890.73–1.090.910.75–1.12
 Bachelor degree or higher32340.2135834.31.231.03–1.461.170.97–1.41
Socioeconomic statusb
 Highest quintile22828.3110227.71.001.00
 4th quintile20725.799825.11.000.82–1.231.050.85–1.31
 3rd quintile16520.579820.11.000.80–1.251.220.96–1.55
 2nd quintile11013.769817.60.760.60–0.971.000.76–1.30
 Lowest quintile9511.83769.51.220.94–1.591.441.07–1.94
Remotenessc
 Major city55368.7237159.71.001.00
 Inner regional17321.5112728.40.660.55–0.790.680.56–0.84
 Outer regional698.640910.30.720.55–0.950.640.47–0.87
 Remote/very remote101.2651.60.660.34–1.290.560.27–1.17
State
 Victoria17321.567717.11.001.00
 New South Wales18923.5100225.20.740.59–0.930.720.57–0.92
 Queensland9311.543711.00.830.63–1.100.750.56–1.00
 Western Australia24129.9143036.00.660.53–0.820.630.50–0.78
 South Australia273.4832.11.270.80–2.031.010.62–1.65
 Australian Capital Territory172.1721.80.920.53–1.611.080.60–1.93
 Tasmania111.4411.01.050.53–2.091.610.76–3.43
 Northern Territory546.72305.80.920.65–1.290.800.56–1.14

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+).