Association of age and BMI with QoL, use of specialist equipment in the home and social security
| QoL indicators and functional measures | Variable | Unadjusted models* | Adjusted models† |
| Regression coefficient (95% CI)‡ | Regression coefficient (95% CI)‡ | ||
| SF-12 PCS | BMI | −4.91 (−6.55 to 3.28) | −5.21 (−6.90 to 3.52) |
| Age | −2.44 (−4.03 to 0.85) | −2.14 (−3.73 to 0.54) | |
| SF-12 MCS | BMI | −0.49 (−2.07 to 1.09) | −0.40 (−2.06 to 1.26) |
| Age | 0.42 (−1.04 to 1.87) | 0.68 (−0.89 to 2.25) | |
| EQ-5D-5L score | BMI | −0.11 (−0.15 to 0.06) | −0.11 (−0.16 to 0.06) |
| Age | −0.08 (−0.12 to 0.03) | −0.07 (−0.11 to 0.02) | |
| EQ-5D-5L VAS | BMI | −7.08 (−10.38 to 3.79) | −7.73 (−11.10 to 4.36) |
| Age | −2.19 (−5.30 to 0.92) | −0.65 (−3.77 to 2.46) | |
| IWQOL-Lite physical function | BMI | 13.72 (10.28 to 17.17) | 14.20 (10.69 to 17.70) |
| Age | 5.77 (2.28 to 9.26) | 5.01 (1.75 to 8.27) | |
| IWQOL-Lite self-esteem | BMI | 5.09 (1.02 to 9.16) | 5.99 (1.86 to 10.12) |
| Age | −4.74 (−8.51 to 0.97) | −5.11 (−8.96 to 1.25) | |
| IWQOL-Lite sexual life | BMI | 5.56 (0.71 to 10.41) | 5.74 (0.82 to 10.67) |
| Age | 3.86 (−0.75 to 8.47) | 3.01 (−1.71 to 7.73) | |
| IWQOL-Lite public distress | BMI | 15.36 (11.72 to 19.00) | 16.07 (12.34 to 19.80) |
| Age | −2.78 (−6.57 to 1.02) | −3.04 (−6.51 to 0.44) | |
| IWQOL-Lite work | BMI | 9.54 (5.25 to 13.84) | 9.59 (5.16 to 14.02) |
| Age | 1.95 (−2.25 to 6.16) | 1.04 (−3.15 to 5.24) | |
| IWQOL total score | BMI | 10.31 (7.29 to 13.33) | 10.88 (7.79 to 13.97) |
| Age | 1.20 (−1.84 to 4.24) | 0.55 (−2.33 to 3.43) | |
| Use of aids or specialist equipment | BMI | 2.34 (1.62 to 3.39)* | 3.10 (1.94 to 4.95)* |
| Age | 2.65 (1.76 to 4.00)* | 3.10 (1.94 to 4.95)* | |
| Disability living allowance (caring) | BMI | 1.19 (0.82 to 1.73)* | 1.07 (0.72 to 1.59)* |
| Age | 1.54 (1.03 to 2.31)* | 1.62 (1.08 to 2.46)* | |
| Disability living allowance (mobility) | BMI | 1.18 (0.82 to 1.70)* | 1.13 (0.77 to 1.65)* |
| Age | 1.64 (1.10 to 2.45)* | 1.62 (1.08 to 2.44)* |
N ≥10 for all indicators and measures for which regression analyses were performed.
*Unadjusted models, including only the effect of BMI (per 10 kg/m2) or age (per 10 years) on QoL indicators and functional measures
†Adjusted models, including the effects of BMI (per 10 kg/m2) and age (per 10 years) on QoL indicators and functional measures, after adjusting additionally for sex, SIMD and smoking status
‡Regression coefficient (95% CI) is estimate (95% CI) for results from the linear regression and OR (95% CI) for results from the logistic regression. OR results are indicated with an asterisk mark (*).
BMI, body mass index; EQ-5D-5L, EuroQoL 5-level EQ172 5D version; IWQOL-Lite, Impact of Weight on Quality of Life-Lite; MCS, Mental Component Summary; QoL, quality of life; SF-12 PCS, 12-item Short Form Survey Physical Component Summary; SIMD, Scottish Index of Multiple Deprivation; VAS, Visual Analogue Scale.