Table 5. Logistic regression estimating the risk of incident disability in different domains of physical function among initially nondisabled subjects.
| Frequency of going outdoors at baseline |
Incident outcome at follow-up | |||||
| Mobility disability | IADL disability | BADL disability | ||||
| Crude OR | Adjusted OR* | Crude OR | Adjusted OR* | Crude OR | Adjusted OR* | |
| (95%CI) | (95%CI) | (95%CI) | (95%CI) | (95%CI) | (95%CI) | |
| Once a day or more | 1 | (reference) | 1 | (reference) | 1 | (reference) |
| Once per 2-3 days | 2.90 | 1.78 | 1.98 | 1.48 | 2.97 | 1.76 |
| (1.66-5.08) | (0.91-3.47) | (1.12-3.51) | (0.75-2.93) | (1.56-5.66) | (0.81-3.85) | |
| Once a week or less | 8.46 | 4.02 | 4.67 | 2.65 | 4.45 | 1.41 |
| (4.28-16.7) | (1.77-9.14) | (2.12-10.3) | (1.06-6.58) | (1.96-10.1) | (0.54-3.66) | |
| Hosmer & Lemeshow χ2 | 6.38 (d.f.=8) | 7.41 (d.f.=8) | 11.20 (d.f.=8) | |||
| P=0.604 | P=0.493 | P=0.190 | ||||
IADL: instrumental activities of daily living, BADL: basic activities of daily living, OR: odds ratio, CI: confidence interval, d.f.: degree of freedom
* : Adjusted odds ratio for age, sex, mobility score, comorbidity, visual and hearing impairments, urinary incontinence, self-rated health, depressive mood, and cognitive function at baseline.