Table 2.

Difference in Follow-Up Physical Performance Measures According to Hospitalization Status

Physical Performance Measure	After Acute Care Hospitalization	After Critical Illness Hospitalization
	Difference in Measurement (95% Confidence Interval) P-Value
Time to walk 10 feet, seconds	0.8 (0.6–0.9) <.001	1.6 (1.0–2.2) <.001
Adjusted difference	0.4 (0.2–0.5) <.001	1.1 (0.5–1.7) <.001
Dominant hand grip strength, kg	−2.9 (−3.2 to −2.6) <.001	−3.3 (−4.6 to −1.9) <.001
Adjusted difference	−0.8 (−1.0 to −0.5) <.001	−1.3 (−2.5 to −0.02) .047
Time to stand from seated position five times, seconds	0.9 (0.6–1.2) <.001	0.3 (−1.6–2.3) .69
Adjusted difference	0.7 (0.4–0.9) <.001	0.13 (−1.9–2.1) .90

Linear regression with generalized estimating equations was used to account for repeated observations, specifying an exchangeable correlation matrix and robust variance estimates. The referent group was visits not occurring after any hospitalization.

Adjusted models included age at study visit, sex, an interaction term for age and sex, Cognitive Abilities Screening Instrument score <90, the relevant baseline physical performance measurement value, time since baseline visit, and the RxRisk adjustment score at baseline.

Adjusted gait time was significantly longer after critical illness than acute care (p=.01) hospitalization. There was no significant difference in adjusted grip strength or chair stand time between the critical illness and acute care groups at follow-up.