Generalized linear model to analyze the difference of CRKS, and subscale of CRKS in different factors.

* The P value≦0.05.CRKS: COPD-related Knowledge scale.Adjusted variable: Sex, Marriage, Highest Educational Level, Social Economic Status, Rotary, Other (chronic) disease, Living with patient, Other care-needed person(s) in home, Spouse is the main caregiver, Duration of care, Weekly days of care, Daily hours of care.Generalized linear model to analyze the difference of CRKS, and subscale of CRKS in different factors.