Table 5 Multiple regression of predictors of WHOQOL-OLD: ONS OMNIBUS and Ethnibus (ﬁnal model) R e s e a r c h r e p o r t ONS Omnibus Unstandardised B Standardised b 95% CI (Two-tailed t test) 95% CI (Two-tailed t test) Ethnibus Unstandardised B Standardised b Independent predictor variables Block 1 Self-rated active ageing Block 2 QoL domain self-ratings QOL: health QoL: social relationships QoL: independence, control over life, freedom QoL: home and neighbourhood QoL: psychological and emotional well- being QoL: ﬁnancial circumstances QoL: leisure and social activities Block 3 Total number of different social activities done in last month (out of listed eight) Total number of relatives, friends, neighbours who would help with practical tasks Block 4 Self-rated health status, compared to others of same age ADL total score (sum of ability to: walk 400 yards, do heavy housework, shop/ carry heavy bags, steps/stairs) Block 5 Age Sex Marital status Block 6 Housing tenure Constant R2 Adjusted R2 Anova F statistic, p value 1.272 0.105 0.650 0.053 1.143 0.089 1.591 0.123 0.106 0.007 1.931 0.138 0.629 0.047 1.428 0.123 0.561 0.090 0.089 0.081 2.332 2.220 0.115 0.039 0.078 0.048 1.261 0.053 0.703 0.067 0.884 0.075 115.284 0.466 0.448 26.728 0.0001 1.360 to 1.148( 0.166) 0.868 NS 0.219 p Value 2.325 to ( 2.373) 0.018 0.650 to 1.949 (0.982) 0.326 NS 2.283 to 0.004 ( 1.971) 0.049 NS 2.811 to 0.370 ( 2.561) 0.011 0.671 3.191 to ( 3.012) 0.003 1.695 to 0.437 ( 1.159) 0.247 2.565 to ( 2.469) 0.014 0.292 0.021 to 1.100 (2.042) 0.042 0.014 to 0.164 (2.319) 0.021 1.260 3.403 to ( 4.275) 0.0001 0.172 to 0.401 (0.788) 0.431 NS 0.203 to 0.046 ( 1.233) 0.218 NS 0.360 to 2.881 (1.529)0.127 NS 1.451 to 0.046 ( 1.1.845) 0.066 NS 1.706 to 0.062 ( 2.114)0.035 0.064 0.011 0.496 0.066 0.559 0.075 0.341 0.045 0.911 0.121 0.548 0.071 0.244 0.032 0.823 0.118 0.500 0.103 0.031 0.031 0.559 0.085 0.169 0.092 0.173 0.097 0.402 0.031 0.099 0.012 0.406 0.073 0.087 0.048 2.270 0.004 100.058 p Value 0.705 to 0.578 ( 0.195) 0.845 NS 1.235 to 0.243 ( 1.320) 0.187 NS 0.192 to 1.311 (1.463) 0.144 NS 0.418 to 1.100 (0.884) 0.377 NS 1.707 to 0.114 ( 2.247)0.025 0.278 to 1.373 (1.304) 0.193 NS 0.982 to 0.495 ( 0.649) 0.517 NS 0.105 1.540 to ( 2.253) 0.025 0.017 to 0.983 (2.036) 0.042 0.071 to 0.132 (0.594) 0.553 NS 1.350 to 0.232 ( 1.389) 0.166 NS 0.388 to 0.050 ( 1.515) 0.131 NS 0.346 to 0.001 ( 1.957) 0.051 NS 0.690 to 0.888 (0.248) 0.804 NS 0.953 to 0.142 ( 1.457) 0.146 NS 1.689 to 0.886( 0.614)0.540 NS ADL, activities of daily living; NS, not signiﬁcant; QOL, Quality of Life. the QoL survey at baseline) were comparable with population estimates from the last census. However, non-response is still a cause for concern. The QoL follow-up sample, by its longitu- dinal design, reﬂected the healthy survivors. Also, although the sampling approach of the Ethnibus survey was statistically robust, it used focused enumeration. There is no other practical methodology for attempting to obtain representative samples of people in ethnic minority groups in national samples. This study reported that Ethnibus respondents obtained poorer (worse) QOL scores than the other sample respondents, with the OPQOL, CASP-19 and WHOQOL-OLD. This is not unexpected given that people in ethnic minority groups are often more J Epidemiol Community Health 2011;65:273e280. doi:10.1136/jech.2009.087668 279