Nutritional parameters affecting severity of pneumonia and length of hospital stay in patients with pneumococcal pneumonia: a retrospective cross-sectional study

Table 3 Correlation between CURB-65 score/PSI and independent variables including age, body mass index, and nutritional parameters

Multivariate linear regression analysis
1. Factors associated with PSI in the ≥65-year-old group (r = 0.467; r ² = 0.219; adjusted r ² = 0.196)
Independent variable	B (95 % CI)	β	t	VIF	P
Age	1.477 (0.504–2.450)	0.467	3.084	1.000	0.004*
2. Factors associated with CURB-65 score in the <65-year-old group (r = 0.618; r ² = 0.382; adjusted r ² = 0.313)
Independent variables	B (95 % CI)	β	t	VIF	P
Age	0.030 (0.004–0.056)	0.450	2.429	1.001	0.026*
Serum cholinesterase	−0.005 (−0.009 to −0.000)	−0.409	−2.208	1.001	0.040*
3. Factors associated with PSI in the <65-year-old group (r = 0.728; r ² = 0.529; adjusted r ² = 0.477)
Independent variables	B (95 % CI)	β	t	VIF	P
Age	2.096 (0.962–3.229)	0.629	3.886	1.001	0.001*
Serum cholinesterase	−0.205 (−0.406 to −0.004)	−0.347	−2.142	1.001	0.046*

(r = 0.467; r ² = 0.219; 2 adjusted r ² = 0.196)
r multiple correlation coefficient, r ² coefficient of determination, B nonstandardized regression coefficient, CI confidence interval; β standardized regression coefficient; VIF variance inflation factor.
*P < 0.05

ISSN: 1471-2466