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Table 4 Unadjusted numbers, proportions and relative risks adjusted for current age for variables associated with having missing data for mother's highest education level, by survey mode

From: Non-response to a life course socioeconomic position indicator in surveillance: comparison of telephone and face-to-face modes

  Telephone (n = 2999) Face-to-face (n = 2893) Face-to-face EWP (n = 2206)
  Unadjusted Adjusted Unadjusted Adjusted Unadjusted Adjusted
  n % (RR, 95% CI) n % (RR, 95% CI) n % (RR, 95% CI)
Sex          
   Male 308 21.0 (1.00) 183 12.9 (1.00) 145 13.6 (1.00)
   Female 295 19.2 (0.89, 0.78–1.03) 169 11.5 (0.86, 0.70–1.06) 132 11.6 (0.84, 0.66–1.06)
Country of birth          
   Australia 431 18.5 (1.00) 239 11.1 (1.00) 187 11.2 (1.00)
   UK/Ireland 112 33.9 (1.43, 1.20–1.70)** 63 19.0 (1.33, 1.02–1.73) 51 19.8 (1.36, 1.02–1.82)
   Other 59 17.8 (0.83, 0.64–1.07) 49 12.5 (0.93, 0.67–1.27) 39 13.9 (1.00, 0.69–1.44)
Marital status          
   Married/de facto 418 20.6 (1.00) 213 11.1 (1.00) 176 11.5 (1.00)
   Separated/divorced/widowed 118 29.3 (1.14, 0.97–1.33) 94 21.3 (1.47, 1.19–1.82)** 64 20.1 (1.30, 1.02–1.65)
   Never married 67 11.9 (0.88, 0.65–1.20) 45 8.4 (1.29, 0.82–2.03) 36 10.2 (1.71, 1.04–2.83)
Area of residence          
   Metropolitan 426 19.2 (1.00) 244 11.6 (1.00) 185 11.6 (1.00)
   Country 176 22.6 (1.12, 0.96–1.30) 108 13.7 (1.13, 0.89–1.44) 91 14.8 (1.22, 0.94–1.59)
Highest education level          
   Bachelor degree or higher 33 6.2 (1.00) 7 1.5 (1.00) 6 1.6 (1.00)
   Certificate/Diploma 87 15.8 (2.37, 1.57–3.56)** 57 8.2 (5.00, 2.29–10.89)** 40 7.4 (4.20, 1.68–10.48)*
   Trade/Apprenticeship 78 21.5 (3.11, 2.06–4.70)** 58 13.9 (7.87, 3.62–17.13)** 45 14.0 (6.98, 2.79–17.45)**
   Left school after age 15 223 21.8 (3.44, 2.35–5.02)** 129 13.9 (8.55, 4.01–18.24)** 103 14.9 (8.15, 3.32–19.98)**
   Left school at age 15 or younger 181 37.4 (4.32, 2.93–6.38)** 101 28.6 (12.54, 5.78–27.20)** 83 29.1 (11.25, 4.53–27.94)**
   Still at school 0 0.0 (-) 0 0.0 (-) 0 0.0 (-)
Gross annual household income          
   More than $60,000 137 12.2 (1.00) 46 4.6 (1.00) 37 4.7 (1.00)
   $40,001 to $60,000 90 16.5 (1.27, 0.97–1.67) 50 9.7 (2.05, 1.26–3.34)* 42 10.7 (2.20, 1.26–3.84)*
   $20,001 to $40,000 127 23.1 (1.53, 1.20–1.95)* 68 13.0 (2.40, 1.51–3.80)** 46 12.1 (2.02, 1.17–3.49)
   Up to $20,000 146 32.1 (1.86, 1.45–2.38)** 119 23.1 (3.64, 2.36–5.61)** 90 23.7 (3.27, 1.97–5.42)**
   Not stated 102 31.7 (2.33, 1.80–3.01)** 69 20.5 (3.81, 2.40–6.05)** 62 22.7 (3.93, 2.31–6.68)**
Employment status          
   Full time employed 178 14.3 (1.00) 88 7.6 (1.00) 63 7.3 (1.00)
   Part time/casual employed 101 18.0 (1.25, 0.98–1.59) 35 6.9 (0.90, 0.59–1.37) 26 6.9 (0.92, 0.56–1.53)
   Unemployed/unable to work 47 28.2 (1.91, 1.43–2.55)** 19 18.7 (2.83, 1.57–5.08)* 10 21.1 (3.20, 1.53–6.70)*
   Home duties 61 22.3 (1.35, 1.03–1.77) 49 14.6 (1.60, 1.09–2.37) 37 14.4 (1.50, 0.94–2.41)
   Retired 202 34.7 (1.62, 1.26–2.08)** 138 23.2 (1.82, 1.19–2.77)* 123 23.2 (1.69, 1.02–2.81)
   Student 11 7.9 (0.72, 0.31–1.71) 11 7.7 (1.43, 0.59–3.43) 10 10.2 (1.97, 0.77–5.05)
   Not stated 4 12.3 (-) 13 23.1 (2.47, 1.48–4.13)* 7 25.7 (2.77, 1.37–5.58)*
Occupation          
   Manager/Administrator/Professional 89 13.2 (1.00) 21 3.7 (1.00) 18 4.1 (1.00)
   Associate professional 43 16.6 (1.26, 0.90–1.77) 24 11.3 (2.98, 1.72–5.18)** 18 11.4 (2.59, 1.41–4.77)*
   Tradesperson/Advanced clerical or service 113 23.5 (1.67, 1.30–2.15)** 76 12.4 (3.08, 1.94–4.89)** 59 12.5 (2.75, 1.64–4.58)**
   Intermediate clerical/service/sales/production/transport 150 20.9 (1.64, 1.29–2.09)** 90 13.0 (3.51, 2.22–5.53)** 73 13.8 (3.36, 2.02–5.57)**
   Elementary clerical, sales, service/labourer 159 26.1 (2.13, 1.68–2.69)** 91 16.1 (4.46, 2.82–7.05)** 66 16.3 (3.90, 2.32–6.55)**
   Not stated/Home duties/Student/Never worked 48 19.0 (1.44, 1.06–1.95) 51 20.4 (4.93, 3.03–8.03)** 43 22.2 (4.56, 2.66–7.82)**
  1. * p < 0.01 ** p < 0.001