Table 2.

Association of gut microbiota biodiversity with clinical domains in hospitalized patients. Multivariate linear regression model, obtained by backward selection analysis of covariates, testing the possible correlation of Chao1 index of alpha-diversity (biodiversity) in gut microbiota with clinical domains in 76 elderly patients hospitalized for acute extra-intestinal diseases.

Clinical variables	Beta ± SE	p
Number of drugs	−28.54 ± 9.88	0.005
Rockwood Clinical Frailty Scale	−14.18 ± 2.18	0.51
CIRS Comorbidity Score	4.91 ± 9.06	0.58
Age	9.17 ± 4.83	0.06
Sex (female vs male)	2.14 ± 7.25	0.97
Days of antibiotic exposure	−128.76 ± 84.27	0.13

SE = Standard Error; CIRS = Cumulative Illness Rating Scale

Significant p values (≤0.05) are indicated in bold.