55 Practical experience with the use of electronic headache diaries 2 ONLINE SUPPLEMENTARY FILES eTable 1. Cross table regarding the accuracy of E-diary with additional E-screening and extended migraine questionnaires in diagnosing migraine (with and without aura symptoms).1 Gold standard (clinical consultation) + - E-diary + 366 33 399 PPV: 366/399 = 0.92 E-diary - 95 73 168 NPV: 73/168 = 0.43 461 106 567 Sensitivity: 366/461 = 0.79 Specificity: 73/106 = 0.69 eTable 2. Cross table regarding the accuracy of E-diary with additional E-extended questionnaire in diagnosing migraine with aura symptoms.1 Gold standard (clinical consultation) + - E-diary + 54 10 64 PPV: 54/10 = 0.39 E-diary - 85 418 503 NPV: 418/503 = 0.83 139 428 596 Sensitivity: 54/139 = 0.39 Specificity: 418/428 = 0.98
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