Assessing HRQL among Chinese patients with coronary heart disease: angina, myocardial infarction and heart failure.
OBJECTIVE
To perform a psychometric evaluation of the Myocardial Infarction Dimensional Assessment Scale (MIDAS) in Chinese patients with coronary heart disease.


METHODS
Patients with angina (n=162), MI (n=124) or heart failure (n=95) were recruited from a regional university-affiliated hospital. The Chinese version of the MIDAS (C-MIDAS), the Hospital Anxiety and Depression Scale (HADS) and the Short-Form 36 Health Survey (SF-36) were administered to all patients at baseline and the C-MIDAS was also administered seven day (n=92) and three months (n=363) later.


RESULTS
The C-MIDAS conforms to the 7-factor structure as proposed in the original version. It is reliable with Cronbach's alphas from 0.73 to 0.94 and test-retest reliabilities from 0.76 to 0.92. Four of its subscales (physical activity, insecurity, emotional reaction and dependency) correlated significantly with the SF-36 and the HADS in each diagnostic group and had good discriminative properties in terms of gender, emotional disturbance and perceived health deterioration, with responsiveness supported by medium-high effect sizes (0.43-0.83) and standardize response means (0.46-0.82). The other three subscales measuring treatment-related impacts added little to the validity and responsiveness of the C-MIDAS.


CONCLUSIONS
To render the C-MIDAS a core health-related quality of life measure for Chinese-speaking patients with coronary heart disease, further studies need to clarify the content adequacy and cultural relevancy of those subscales measuring treatment-related impact.
Yu
Doris S F
DS
Rm 729, Esther Lee Building, Department of Medicine and Therapeutics, The Chinese University of Hong Kong, and The Prince of Wales Hospital, Shatin, New Territories, Hong Kong. dyu@cuhk.edu.hk
Thompson
David R
DR
Yu
Cheuk-man
CM
Oldridge
Neil B
NB
D000368:Aged; D000787:Angina Pectoris / Q000208:ethnology / Q000503:physiopathology*; D044466:Asian People; D005260:Female; D006304:Health Status; D006333:Heart Failure / Q000208:ethnology / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000208:ethnology / Q000503:physiopathology*; D011594:Psychometrics; D011788:Quality of Life; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires