Association of frailty and functional recovery in an Acute Care for Elders unit: a prospective observational study

Table 4 Multiple linear regression using frailty status, baseline ADL, length of stay and principal diagnosis, as the independent variables for the ADL changes between admission and discharge

Variable	Unstandardized coefficients B	95% CI	P-value
Age, years	0.01	-0.5 to 0.5	0.96
Sex (male vs female)	-0.1	-7.9 to 7.8	0.98
CCI	1.9	-0.2 to 4.1	0.08
ADL before admission	-0.1	-0.3 to 0.04	0.13
Length of stay, days	-0.2	-0.8 to 0.5	0.58
Frailty status
Prefrail vs robust	8.6	-0.5 to 17.8	0.06
Frail vs robust	12.6	1.7 to 23.6	0.03
Principal diagnosis
Urinary tract infection vs other diagnoses^a	-0.3	-8.4 to 7.9	0.95
Pneumonia vs other diagnoses^a	-2.9	-15.4 to 9.6	0.65
Gastric ulcer vs other diagnoses^a	4.5	-8.8 to 17.9	0.50

Note. ADL Activities of daily living, CI Confidence interval, CCI Charlson Comorbidity Index (range, 0–37)
^aPatients with other diagnoses referred to all patients excluding those with the three most common principal diagnoses (urinary tract infection, pneumonia and gastric ulcer)

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