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This pilot study assessed the predictive ability of the prognostic expectations of 19 myocardial infarction (MI) patients relative to their functional health status (as measured by the McMaster Health Status Index) eight weeks post-MI. The relationship of patient expectations, medical severity of the MI and functional health status at two days prior to hospital discharge and eight weeks post-MI were also described. In spite of the constancy of low medical severity of the MI, there was no significant improvement in overall functional health status scores for patients between the time of hospital discharge and eight weeks post-MI. The raw score comparison of the physical, emotional and social components of functional health status outcome indicated general improvement in physical functioning and a downward trend in emotional and social components over time. As the majority of patients had good expectations and fair outcome scores, it could be concluded that neither medical severity of the MI nor prognostic expectations defined good or poor functional health status at eight weeks post-MI. It could be concluded that either there were not sufficient reinforcements in the clinical or home environment to facilitate the patient's achievement of good functional health status, or the study's design and instruments were not sufficiently effective in detecting subtle variations in patient variables.