Table 2.
Univariate Cox proportional hazard models for demographic and health characteristics and incidence of severe walking disability in the women's health and aging study I (N = 394).
| Characteristic | Univariate H.R. | 95% C.I. | P |
|---|---|---|---|
| Age (years) | |||
| ≤69 | 1.00 | — | — |
| 70–74.9 | 1.18 | 0.64, 2.18 | 0.60 |
| 75–79.9 | 0.93 | 0.46, 1.86 | 0.83 |
| 80–84.9 | 1.96 | 0.99, 3.89 | 0.05 |
| 85–89.9 | 2.35 | 1.28, 4.34 | 0.006 |
| ≥90 | 5.04 | 2.25, 11.26 | <0.0001 |
|
| |||
| Race (white) | 0.76 | 0.50, 1.16 | 0.19 |
| Education < 12 years | 1.12 | 0.75, 1.67 | 0.58 |
| Current smoking | 1.59 | 0.93, 2.70 | 0.09 |
| Body mass index (kg/m2)1 | |||
| <18.5 | 0.98 | 0.30, 3.25 | 0.98 |
| 18.5–24.9 | 1.00 | — | — |
| 25.0–29.9 | 0.75 | 0.45, 1.26 | 0.28 |
| ≥30 | 0.75 | 0.45, 1.27 | 0.28 |
|
| |||
| MMSE < 24 | 1.59 | 0.93, 2.70 | 0.09 |
| Hypertension | 1.04 | 0.71, 1.54 | 0.84 |
| Coronary heart disease | 1.09 | 0.70, 1.71 | 0.70 |
| Congestive heart failure | 1.87 | 1.08, 3.24 | 0.03 |
| Peripheral artery disease | 1.74 | 1.12, 2.72 | 0.01 |
| Stroke | 0.46 | 0.06, 3.31 | 0.44 |
| Chronic obstructive pulmonary disease | 1.21 | 0.80, 1.85 | 0.37 |
| Diabetes mellitus | 1.79 | 1.13, 2.85 | 0.01 |
| Depression | 1.21 | 0.70, 2.09 | 0.49 |
| Renal insufficiency | 1.18 | 0.79, 1.75 | 0.42 |
| Osteoarthritis | 1.22 | 0.83, 1.81 | 0.32 |
| CML highest quartile | 1.68 | 1.11, 2.52 | 0.01 |
1For body mass index, 18.5–24.9 kg/m2 was used as the reference category.