Area-level socio-economic status (SES) predictors of health status: multiple linear regression analyses with and without individual SES variables
Health outcomes# | Subjects n | Multiple logistic regression models¶ | |||||||||
Area-level SES only | Area-level and individual SES | ||||||||||
R2 | Factor 1 | Factor 2 | R2 | Factor 1 | Factor 2 | ||||||
β±se | p-value | β±se | p-value | β±se | p-value | β±se | p-value | ||||
Asthma or rhinitis | |||||||||||
SF-12 PCS | 404 | 0.04 | −2.28±0.53 | <0.0001 | 0.84±0.53 | 0.11 | 0.22 | −1.36±0.55 | 0.01 | 0.79±0.50 | 0.12 |
Severity of asthma score | 404 | 0.01 | 0.61±0.27 | 0.02 | −0.13±0.27 | 0.62 | 0.13 | 0.21±0.29 | 0.46 | −0.13±0.26 | 0.62 |
FEV1 % pred | 218 | 0.03 | −0.35±1.12 | 0.76 | −3.59±1.17 | 0.002 | 0.03 | 0.21±1.28 | 0.87 | −2.95±1.24 | 0.02 |
Asthma alone | |||||||||||
SF-12 PCS | 341 | 0.05 | −2.28±0.59 | 0.0001 | 1.16±0.59 | 0.05 | 0.22 | −1.40±0.61 | 0.02 | 1.04±0.56 | 0.06 |
Severity of asthma score | 341 | 0.01 | 0.63±0.29 | 0.03 | −0.31±0.29 | 0.27 | 0.14 | 0.31±0.30 | 0.30 | −0.33±0.28 | 0.24 |
FEV1 % pred | 186 | 0.03 | −0.44±1.22 | 0.72 | −3.41±1.30 | 0.01 | 0.04 | −0.13±1.37 | 0.92 | −2.62±1.37 | 0.06 |
Asthma QoL score+ | 340 | 0.06 | 3.83±0.78 | <0.0001 | −0.24±0.78 | 0.76 | 0.23 | 2.58±0.80 | 0.001 | −0.06±0.73 | 0.94 |
SF-12 PCS: Short Form-12 Physical Component Scale; FEV1: forced expiratory volume in one second; % pred: % predicted; QoL: quality of life. #: a higher SF-12 PCS equates with a better health status, a higher severity of asthma score and asthma QoL score equate with poorer status; ¶: reported R2 is adjusted to take into account number of predictors in model, models with individual SES include all of the variables listed in table 5⇑; +: one asthma subject with missing data for QoL score.