Table 1.

Subject characteristics by study groups

Covariates		Intervention n = 524	Control n = 534	P
Age, median (interquartile range)		86.2 (79.1 - 93.7)	85.3 (78.5 - 94.2)	0.45
Female		310, 59.2%	327, 61.2%	0.58
Non-Whites		160, 30.5%	165, 31.0%	0.77
Education year, median (interquartile range)		9.7 (7.7 - 10.8)	10.1 (8.1 - 11.3)	0.26
Severity of illness	Mild	68, 12.9%	85, 16.0%	0.18
	Moderate	130, 24.9%	129, 24.1%
	Major	193, 36.9%	186, 34.9%
	Extreme	133, 25.3%	137, 25.0%
Cognitive impairment		151, 28.8%	161, 30.2%	0.46
Charlson comorbidity index, median (interquartile range)		3.45 (2.30 - 5.38)	3.41 (2.24 - 5.49)	0.63
Hospital length of stay (interquartile range)		5.36 (4.31 - 6.79)	5.59 (4.44 - 7.62)	0.39