Table 1.
Demographic and clinical characteristics of the sample by age group
| Whole sample (n = 8555a) | Age groups | |||
|---|---|---|---|---|
| Under 65 (n = 6403b) | Over 65 (n = 2152c) | p value | ||
| Women (%) | 51.4 | 52.7 | 47.5 | <0.001 |
| Mean age (years ± SD) | 48.9 ± 18.9 | 40.3 ± 13.0 | 74.7 ± 6.5 | <0.001 |
| Education level (%): Less than Year 12 |
27.9 | 24.4 | 38.2 | <0.001 |
| Year 12 or equivalent | 24.3 | 23.5 | 26.5 | |
| More than Year 12 | 47.7 | 52.0 | 35.0 | |
| Race (%): Mexican-American |
20.3 | 21.7 | 16.1 | <0.001 |
| Non-Hispanic White | 52.0 | 47.8 | 64.5 | |
| Non-Hispanic Black | 20.4 | 22.3 | 15.0 | |
| Other | 7.3 | 8.2 | 4.4 | |
| Mean FI (± SD) | 0.13 ± 0.12 | 0.10 ± 0.10 | 0.22 ± 0.13 | <0.001 |
| Metabolic syndrome (%) | 29.5 | 24.1 | 45.5 | <0.001 |
| Mean waist circumference (cm ± SD) | 98.0 ± 15.3 | 97.3 ± 15.7 | 100.4 ± 13.6 | <0.001 |
| HDL level (mg/dL ± SD) | 54.9 ± 16.5 | 54.7 ± 16.5 | 55.6 ± 16.5 | <0.05 |
| TG level (mg/dL ± SD) | 148.1 ± 122.9 | 147.5 ± 133.6 | 149.8 ± 83.7 | 0.61 |
| SBP (mm Hg ± SD) | 124.8 ± 20.2 | 120.2 ± 16.8 | 138.6 ± 23.1 | <0.001 |
| DBP (mm Hg ± SD) | 69.2 ± 13.7 | 70.6 ± 12.4 | 65.1 ± 16.3 | <0.001 |
| FBG level (mg/dL ± SD) | 104.9 ± 35.1 | 102.0 ± 35.2 | 113.3 ± 33.5 | <0.001 |
FI frailty index, HDL high-density lipoprotein, TG triglyceride, SBP systolic blood pressure, DBP diastolic blood pressure, FBG fasting blood glucose, SD standard deviation
a n = 8469 for HDL level, n = 4106 for TG level, n = 8294 for SBP and DBP, n = 4118 for FBG level
b n = 6336 for HDL level, n = 3067 for TG level, n = 6220 for SBP and DBP, n = 3078 for FBG level
c n = 2133 for HDL level, n = 1039 for TG level, n = 2074 for SBP and DBP, n = 1040 for FBG level