Table 2. Multivariate Poisson regression for measuring association between associated factors with malnutrition (n=83)

Malnutrition by SGA	PR	95%CI	p-value
Age group
< 60 years	1
≥ 60 years	1.28	1.14; 1.44	<0.01
BMI (kg/m2)	0.93	0.91; 0.94	<0.01
Handgrip strength (kg)	0.99	0.99; 1.00	<0.01

PR: Prevalence Ratio; 95%CI: 95% Confidence Interval
A multivariate Poisson regression with robust variance estimator using backward selection adjusted for age group, marital status, working status, comorbidities, acute respiratory failure, handgrip strength, weight, and Body Mass Index (BMI).
Malnutrition was classified using SGA (Subjective Global Assessment).