Background and Objective: Despite the great advances, coronary heart disease is a leading cause for death in most countries including Iran. This study develops new combined distribution of probability, validity, and fuzzy to assess the risk factors of coronary heart disease. Material and Method: The study group in this research consisted of 73 patients who referred to the hospitals of South Khorasan Province. After identifying the risk factors through distributing a questionnaire among physicians, they were asked to state their viewpoints about the effect of the risk factors on a scale ranging from the least important to the most important. Then, using this information and based on the proposed fuzzy probability-validity modeling, the risk factors of coronary heart disease were assessed. Results: A strong association was found among blood pressure, gender, and HDL. With decreasing diastolic blood pressure by one unit in males, 4% decrease in the risk was observed while with increasing HDL and decreasing weight by one unit in females, 5.3% decrease was obtained. With an n increase in the HDL of all 73 cases, the risk of disease was decreased approximately to 22% in females and 13.3% in males. Conclusion: It seems that blood pressure variable in males and blood lipids in females are the most determining factors as compared to other risk factors. Therefore, it seems that a fast and effective way to decrease the risk of such diseases is to control diastolic blood pressure in males and two variables of HDL and obesity in females.

Background and Objective: Post-stroke fatigue is a troublesome symptom and a common complaint of stroke patients. The purpose of this study was to investigate the psychometric features of the Persian version of the FIS (FIS-P) administered to Iranian stroke patients.
Materials and Methods: In this cross-sectional methodological study, the psychometric properties of the Persian version of the FIS (FIS-P) were examined. The participants were 280 Iranian people (140 healthy adults; 140 stroke patients) who were assessed using the FIS-P, fatigue severity scale (FSS), and SF-36 questionnaire. The content, convergent, and discriminant validity of the FIS-P were evaluated using CVR and CVI, Pearson correlation, and independent-sampling T-tests, respectively. Furthermore, inter-rater reliability and test-retest reliability were assessed via the intra-class correlation coefficient and SEM. The internal consistency reliability was evaluated using Cronbach’s α.
Results: The results of the CVR for items ranged from 0.6-1, and the CVI of the FIS-P was 0.85. The Pearson correlation measure revealed strong and inverse correlations between FIS-P and FSS and a low to moderate relationship between all subscales of the SF-36 and FIS-P in terms of convergent validity. T-test results showed the discriminant validity of the FIS-P in differentiating between stroke patients and healthy participants. The ICC coefficients for test-retest and inter-rater reliability for the overall scale were 0.991 and 0.984, respectively. Cronbach’s α was 895.
Conclusion: The strong psychometric properties of the FIS-P indicated its applicability in assessing the impact of fatigue on stroke victim’s daily activities and the effectiveness of therapeutic and rehabilitation interventions.