TABLE 6.

Factors associated with hospital length of stay in the logistic regression model and the multiple linear regression model

Pneumonia patient	Logistic regression	Multiple linear regression
	All suspected	All suspected	Definite
Age	No	No	Yes
Site	Yes	Yes	No
Functional status	Yes	Yes	No
Weight loss >5% of body weight	Yes	Yes	Yes
Hours from presenting to ER to first dose of antibiotic	Yes	Yes	Yes
Symptom
Sweats	Yes	No	No
Shaking chills	Yes	No	No
Wheeze	Yes	No	No
Altered mental state	No	Yes	No
Shortness of breath	No	Yes	No
Comorbidity
Heart disease	Yes	Yes	No
Renal disease	Yes	No	No
Neoplastic disease	Yes	No	No
Liver disease	No	Yes	No
COPD	No	Yes	No
Complication	Not used
Indwelling urinary catheter (new)		Yes	Yes
Empyema		Yes	Yes
Respiratory failure requiring mechanical ventilation		No	Yes
New-onset diabetes mellitus		No	Yes
New-onset hypokalemia (value of potassium <3 mmol/L)		No	Yes
Antibiotic	Not used
Clindamycin		Yes	Yes
Metronidazole		Yes	Yes
Cefuroxime		Yes	No
Ciprofloxacin		Yes	No

COPD Chronic obstructive pulmonary disease; ER Emergency room