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Table 8 Number of ECG deviations in 1993 electrocardiographic abnormalities and myocardial infarction and death in 964 middle-aged, employed men in 1993 followed for 25 years

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

Minnesota Code Explanation Investigated persons Observed findings Findings with death Findings with infarct p value death p value infarct ECG findings both in 1993 and 1998
Q and QS patterns
 1:1 Q and QS pattern (% with endpoint) 964 3 1 (33) 2 (67)   0.000 2
 1:2 Q, QS, and QSR pattern (% with endpoint) 964 10 1 (10) 2 (20)    5
STJ and segment depression
 4:1 or 4:2 STJ depression (% with endpoint) 947 5 4 (80) 3 (60) 0.000 0.000 1
T wave items
 5:1 or 5:2 T wave negative or biphasic (% w. endpoint) 947 7 3 (43) 2 (29) 0.004 0.075 3
AV conduction defect
 6:1 Complete AV block 964 0      
 6:4:1 Wolf-Parkinson-White pattern 964 0      
 6:8 Artificial pacemaker 964 0      
Ventricular conduction defect
 7:1:1 Complete left bundle branch block 964 1 0 0    0
 7:2:1 Complete right bundle branch block 964 7 1 (14) 2 (29)    4
 7:3 Incomplete RBB 964 23 1 (4) 5 (22)    11
 7:4 Intraventricular block 962 11 4 (36) 1 (9) 0.004   0
 7:6 Incomplete LBB 919 8 1 (13) 1 (13)    
  1. The p values refer to death and infarct risk comparisons between persons with and without ECG abnormalities. Only p values smaller than 0.100 are shown. Note that the p values themselves are due to variation. Even one single finding more or less might change the p value substantially.