- The table depicts crude mean and weighted mean for knowledge of symptoms of acute myocardial infarction in a group that was asked closed-ended questions and a group that was asked open-ended questions. If a study offered more than one knowledge percentage for a composite symptom, e.g. study 6 offered knowledge percentages on ‘weak pulse’ and ‘dizziness’ for the symptom ‘feeling weak, lightheaded, or faint’, we used the arithmetic mean of those percentages for our calculation. Studies included in the table: Study 1, [16] 2, [20], 3, [21] 4, [22] 5, [25] 6, [26] 7, [27] 8, [28] 9, [30] 10 [31].
