Characteristics of the study participants and their rank order correlations with frailty status and allostatic load (n=876)
| Characteristic | Mean (SD), median (IQR) or number (%) | Correlation with frailty status† | Correlation with allostatic load† |
|---|---|---|---|
| IQ at age 11 years, mean (SD) | 100.9 (14.5) | −0.126*** | −0.164*** |
| Female, n (%) | 443 (50.6) | −0.002 | −0.071* |
| Father in professional/managerial social class, n (%) | 229 (26.0) | 0.097** | 0.100** |
| Home environmental deprivation score at age 11 years | −0.16 (−0.38 to 0.15) | −0.028 | 0.009 |
| Professional/managerial social class, n (%) | 502 (57.1) | 0.142*** | 0.149*** |
| Has degree, n (%) | 132 (15.1) | −0.161*** | −0.181*** |
| Allostatic load, median (IQR) | 3 (2–5) | 0.248*** | – |
| Frailty status, n (%) | – | 0.248*** | |
| Not frail | 404 (46.0) | ||
| Prefrail | 410 (46.8) | ||
| Frail | 62 (7.06) | ||
| Smoking status | 0.079* | 0.147*** | |
| Never | 386 (44.0) | ||
| Ex | 384 (43.8) | ||
| Current | 106 (12.1) | ||
| Alcohol units per week, n (%) | −0.074* | −0.070* | |
| None | 162 (18.5) | ||
| ≤21 (men)/≤14 (women) | 562 (64.0) | ||
| ≥22 (men)/≥15 (women) | 152 (17.4) | ||
| Physical activity, mean (SD) | 2.97 (1.10) | – | −0.229*** |
†Rank order correlations with father's or own social class or highest educational qualification were based on the 5-category version of these variables. As low physical activity is a component of frailty status we do not show the correlation between them. ***p<0.001, **p<0.01, *p<0.05.