Table 8.

Single and multiple linear regression of factors associated to length of stay in frail patients.

Single Linear Regression Analysis				Multiple Linear Regression Analysis
	Coefficients	p Value	IC 95% of Coefficient	Coefficients	p Value	IC 95% of Coefficient
MMSE, score	0.70	<0.001	0.50–0.81	0.11	0.175	−0.01–0.27
ADL, score	3.07	<0.001	2.40–3.64	0.09	0.794	−0.78–0.60
CONUT, score	2.38	<0.001	2.22–2.55	2.11	<0.001	1.78–2.40

Data are expressed as mean (±standard deviation), median [interquartile range] or n (percentage) as appropriate. Abbreviations: MMSE, mini mental state examination; ADL, activity of daily living; CONUT, controlling nutritional status. p value < 0.05 were considered statistically significant (in bold).