Risk factors of hospitalization and readmission of patients with COPD in Hong Kong population: Analysis of hospital admission records

Table 4 Analysis of potential factors affecting ALOS for COPD^ treatment

	Negative Binomial Regression Model
	ß	Standard Error	P
Age	0.0023	0.0024	0.3248
Gender
Female	0.3803	0.0554	< 0.001
Male	0 (reference)
Public assistance*
Yes	0.1692	0.0464	0.0003
No	0 (reference)
Living in nursing home
Yes	0.5430	0.0652	< 0.001
No	0 (reference)
Unplanned readmission
Yes	0.3891	0.0533	< 0.001
No	0 (reference)
Charlson comorbidity index	0.3171	0.0405	< 0.001

^ COPD: ICD-9-CM Diagnosis Code: 490-492, 494-496
*Public assistance: Patients eligible for complete or partial medical fee waiver

ISSN: 1472-6963