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Table 8 Inter- and intra-observer variability of the Sm (avg)

From: Mitral annular systolic velocity as a marker of preclinical systolic dysfunction among patients with arterial hypertension

  Intra-observer Inter-observer
Participants (n=210) Mean±SD (1 observer) Bland-Altman (95% CI) CV% Mean±SD (2 observers) Bland-Altman (95% CI) CV%, pooled mean±SD
Healthy male/female (n=30)
Sm lat. (cm/s) 10.2±0.1 0.7 (−1.0 ÷ 2.0) 12.5 10.3±0.1 2.5 (−3.5 ÷ 1.5) 13.0 ± 1.0
Sm sep. (cm/s) 10.4±0.1 1.13(−1.5 ÷ 1.5) 8.5 10.4±0.1 2.3 (−0.2 ÷ 2.4) 9.0 ± 1.0
Sm (avg) (cm/s) 10.3±0.1 1.5 (−1.0 ÷ 1.95) 9.0 10.4±0.1 2.2 (0.1 ÷ 2.5) 10.0 ± 1.0
HTN male/female (n=90)
Sm lat. (cm/s) 10.1±0.1 0.5 (−2.2 ÷ 2.2) 10.5 10.1±0.1 0.3 (0.0 ÷ 0.5) 12.0 ± 1.0
Sm sep. (cm/s) 10.2±0.1 1.2 (−1.2 ÷ 1.2) 7.5 10.2±0.1 −2.8 (−3.0 ÷ −0.5) 8.0 ± 1.0
Sm (avg) (cm/s) 10.1±0.1 −2.5 (−3.0 ÷1.0) 9.5 10.1±0.1 1.4(−1.1 ÷ 2.8) 10.5 ± 1.0
DD male/female (n=90)
Sm lat. (cm/s) 9.2±0.1 1.0 (−1.5 ÷ 1.5) 11.5 8.9±0.1 0.95 (−0.2 ÷ 1.0) 12.5 ± 1.0
Sm sep. (cm/s) 9.5±0.1 0.25 (−1.5 ÷ 1.5) 8.0 9.4±0.1 1.13 (−1.5 ÷ 1.5) 10.0 ± 1.0
Sm (avg) (cm/s) 9.3±0.1 −2.7 (−3.0 ÷ −1.0) 9.0 9.2±0.1 −1.8 (−2.4 ÷ 0.6) 10.0 ± 1.0
  1. CV = [(measurment1 − measurment2)/arithmetic mean of measurement] × 100.