Prospective associations between ECG abnormalities and death or myocardial infarction in a cohort of 980 employed, middle-aged Swedish men

The Egyptian Heart Journal

Table 2 Electrocardiographic abnormalities (ECGA) of the 977 cohort participants, men aged 45–50, in 1993 (baseline) and at follow up in 1998

Classification of ECG outcomes
The 977 participants were classified into three ECG categories as follows: ECG category 0, ECG performed in 1993 and 1998, no ECGA, (n = 790); ECG category 1, ECG performed in 1993 and/or 1998, one or more abnormalities (n = 79); and ECG category 9, ECG performed in 1993 or 1998 without abnormality (n = 108)
^a23 non-informative
^b1000-23 informative