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Table 2 QRS duration baseline and follow-up data

From: Baseline Framingham risk score does not predict future ECG-derived QRS duration over an average of 3.3 years

  All (N = 202) Male (N = 86) Female (N = 116)
  Min. Max. Mean ± SD Min. Max. Mean ± SD Min. Max. Mean ± SD
Baseline QRSd (ms) 76 180 101.1 ± 15.5 77 180 106.1 ± 16.0 76 167 97.5 ± 14.1
Follow-up QRSd (ms) 77 177 103.0 ± 16.3 83 163 107.9 ± 16.1 77 177 99.3 ± 15.5
QRSd change (ms) − 37 67 1.8 ± 11.4 − 37 67 1.8 ± 12.5 − 30 63 1.8 ± 10.7
Interval years (between visits) 0.6 6.0 3.3 ± 1.1 1.0 6.0 3.2 ± 1.1 0.6 5.3 3.3 ± 1.1
  1. This tables provides QRS duration for the two clinic visits (baseline and follow-up). Also the table calculates QRSd change and interval years between the two clinic visits