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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.