Table 3.
Logistic Odds Ratio of ADL disability by BMI and WC, respectively, among the females oldest old, Chinese Longitudinal Healthy Longevity Survey, China, 2011 (n=3192).
| Variables | Un-adjusted | Model 1 | Model 2 | Model 3 |
|---|---|---|---|---|
| BMI (<20 kg/m2, n=1817 ) | ||||
| Lowest | 1.61 (1.28-2.03) | 1.51 (1.18-1.93) | 1.34 (0.97-1.84) | 1.42 (1.02-1.97) |
| lower | 1.34 (1.07-1.69) | 1.32 (1.04-1.69) | 1.25 (0.91-1.70) | 1.26 (0.92-1.73) |
| low | 1.00 reference | 1.00 reference | 1.00 reference | 1.00 reference |
| BMI (>=20 kg/m2, n=1375) | ||||
| high | 1.00 reference | 1.00 reference | 1.00 reference | 1.00 reference |
| higher | 0.72 (0.55-0.95) | 0.83 (0.62-1.11) | 0.82 (0.58-1.16) | 0.88 (0.61-1.26) |
| Highest | 0.84 (0.64-1.10) | 1.06 (0.79-1.41) | 1.04 (0.73-1.47) | 1.07 (0.74-1.54) |
| WC (<80 centimeter, n=1774) | ||||
| Lowest | 1.68 (1.33-2.12) | 1.49 (1.16-1.90) | 1.47 (1.07-2.03) | 1.47 (1.06-2.04) |
| lower | 1.25 (0.99-1.57) | 1.22 (0.95-1.56) | 1.22 (0.89-1.68) | 1.19 (0.86-1.65) |
| low | 1.00 reference | 1.00 reference | 1.00 reference | 1.00 reference |
| WC (>=80 centimeter, n=1418) | ||||
| high | 1.00 reference | 1.00 reference | 1.00 reference | 1.00 reference |
| higher | 0.85 (0.64-1.12) | 0.90 (0.67-1.22) | 0.94 (0.66-1.35) | 0.92 (0.64-1.33) |
| Highest | 0.76 (0.59-0.99) | 0.98 (0.74-1.31) | 1.02 (0.72-1.43) | 0.98 (0.69-1.41) |
Abbreviations: ADL, activities of daily living; BMI, body mass index; CI, confidence interval; OR, odds ratio; WC, waist circumference.
Data was shown as OR (95% CI), and the group ‘low ’ and ‘high’ were used as reference group.
Range for body mass index (BMI): lowest 12.01 to <16.65; lower 16.65 to <18.26; low 18.26 to <20,0; high 20.0 to <21.43; higher 21.43 to <23.67; highest 23.67 to <=44.06.
Range for waist circumference (WC): lowest 51 to <68; lower 68 to <74; low 74 to <80; high 80 to <84; higher 84 to <90, highest 90 to<=130;
Model 1: adjustment for age, education, nationality, marital status; Model 2: additionally adjusted for living arrangement, smoking, drinking, physical activities, leisure activities and resilience; Model 3: additionally adjusted for self-rated health status, cognitive impairment, SBP, DBP, the prevalence of heart diseases, stroke, respiratory disease, cancer and bone joint disease.
Similar results were obtained when BMI and WC were both included in models.