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Table 2 Prevalence of ECG abnormalities at age 50 and 70

From: T wave abnormalities, high body mass index, current smoking and high lipoprotein (a) levels predict the development of major abnormal Q/QS patterns 20 years later. A population-based study

ECG abnormalities * Age 50 (n = 2314) n (%) Age 70 (n = 1135) n (%)
Major Q or QS pattern (1.1) 6 (0.26) 102 (9.0)
Minor Q or QS pattern (1.2/1.3) 20 (0.86) 49 (4.32)
ST seg. depression (4.1/4.2) 50 (2.16) 161 (14.19)
T wave items (5.1–5.4) 130 (5.62) 180 (15.86)
LBBB (7.1) 5 (0.22) 18 (1.59)
High R-amplitude (3.1–3.3) 336 (14.52) 269 (26.8)
Atrial fibrillation/flutter (8.3) 7 (0.30) 55 (4.85)
  1. * Minnesota codes in parenthesis.
  2. LBBB, left bundle branch block
  3. No attempt was made to eliminate overlap due to the occurrence of several items in one ECG. Subjects with acute MI before first survey were excluded from the analysis.