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. Author manuscript; available in PMC: 2012 Jul 17.
Published in final edited form as: Ann Intern Med. 2012 Jan 17;156(2):131–140. doi: 10.1059/0003-4819-156-2-201201170-00009

Table 2.

Exposure Rates of Potential Precipitants per 100 Person-Months According to Long-Term Disability in Community Mobility*

Long-term Disability in Walking a Quarter Mile
 Long-term Disability in Driving a Car
Yes (N=318) No (N=250) Yes(N=269) No (N=238)
Potential Precipitant Rate 95% CI Rate 95% CI P-Value Rate 95% CI Rate 95% CI P-Value
Hospitalization 5.2 4.4–6.2 3.2 2.6–3.9 <.001 5.0 4.1–5.9 3.4 2.8–5.1 <.001
Restricted activity 17.8 16.2–19.7 9.7 8.6–11.0 <.001 16.6 14.9–18.4 11.0 9.8–12.4 <.001
*

For each of the two tasks, the exposure period includes the time to long-term disability or to a censoring event for participants without long-term disability. 95% confidence intervals and P-values were estimated using a GEE Poisson model without adjustment for covariates.