Cardiac Care Solution for Coronary Disease Follow up

Proportion of patients who use standardized secondary prevention medication according to current guidelines.

The Chinese version MMAS-8, a self-administered rating scale for assessing medication adherence, contains eight items. Each item is measuring a specific behavior and is not a determinant of adherence behavior. Response choices are yes/no for items 1-7 and a 5-point Likert response for the last item. Each response of "no" is rated as "1" and each "yes" is rated as "0" except for Item 5, in which each response of "yes" is rated as "1" and each "no" is rated as "0". For Item 8, responses "0", "1", "2", "3" and "4", are rated as "0", "0.25", "0.75", "0.75" and "1", respectively. The total score on the MMAS-8 can range from 0 to 8, where higher scores indicate higher adherence. The degree of adherence was determined according to the score resulting from the sum of all the correct answers: low adherence (<6 points), medium adherence (6 to <8 points), and high adherence (8 points). In this study, patients were considered adherent when they had a score equal to eight in the MMAS-8.

Blood pressure, serum LDL-C level and fast serum glucose

The EQ-5D(EuroQol-5 Dimensions) is an established health-related quality of life instrument, used frequently in both clinical trials and health services research. The EQ-5D instrument classifies respondent's present-day health status in five dimensions (mobility, self-care, usual activities, pain/discomfort and anxiety/depression); each dimension is represented by one question with three severity levels (no problems, some problems and severe problems). Scores for the five dimensions can be converted into a utility index score by applying the scores from preference weights elicited from the UK general population. This calculation produces a value between -0.59 and 1.00, and a value below 0 indicates a worse health condition than death. Higher scores indicate better health status.

EQ-5D Visual Analog Score was used in the survey, with anchor points 0 (worst health state) and 100 (best health state). The scale consisted of a horizontal line where every 10th was marked and labelled 0, 10, 20,…, 100. The question was framed: "On the scale please point out which point best represents your own health state today."

The Seattle Angina Questionnaire (SAQ), a 19-item index, is a commonly used disease-specific instrument for assessing symptoms and their impact on daily life with CAD. SAQ comprises five domains: physical limitation (PL), anginal stability (AS), anginal frequency (AF), treatment satisfaction (TS), and the disease perception (DP). SAQ is scored by assigning each response an ordinary value, from 1 (the lowest level of functioning) to 10 (the highest level of functioning), and summing across items within each of the 5 dimensional scales. Scale scores are then transformed to a scale of 0 to 100 by subtracting the lowest possible scale score, dividing the remainder by the range of the scale, and multiplying that by 100. Higher scores on SAQ subscales indicate higher levels of functioning/satisfaction and fewer limitations. The Chinese version of SAQ has been shown to be a valid, responsive, and reliable instrument and has been used in clinical trials.

Record events and describe

The Coronary Heart Disease Self-Management Behavior Scale used the Likert 5-point scale method to investigate patients' self-management behavior over the past 3 months. This scale has been widely used in China for self-management behavior of patients with coronary heart disease. The measurement has a good reliability and validity. The scale has three dimensions: (1) The dimensions of daily management, including management of general life and bad habits; (2) The dimension of emotion management is the emotional cognition management; (3)The dimensions of medical management include management of symptom, first-aid, disease knowledge and treatment adherence. The scores of the items in each dimension add up and transform to represent the total score of the dimension; the sum of the dimension scores represents the total score of self-management behavior, which range from 0 to 100. The higher the score that patient had indicates the better self-management behavior.