The relationship between mitral annular systolic velocity and ejection fraction in patients with preserved global systolic function of the left ventricle

Table 6 Assessment of the reliability of the measurements of EF and Sm(avg) by ICC

Participants (n=308)	ICC (1 observer)	95% CI	Strength of agreement	ICC (2 observers)	95% CI	Strength of agreement
Controls (n=10)	Single measures			Average measures
EF (%)	0.9337	0.9020 ÷ 0.9553	Very good	0.9653	0.9485 ÷ 0.9772	Very good
Sm _(avg) (cm/s)	0.8634	0.8010 ÷ 0.9010	Very good	0.9216	0.8901 ÷ 0.9450	Very good
HTN (n=10)
EF (%)	0.6337	0.6020 ÷ 0.7553	Good	0.7653	0.6485 ÷ 0.7772	Good
Sm _(avg) (cm/s)	0.8337	0.8015 ÷0.8080	Very Good	0.9059	0.8095 ÷ 0.9210	Very Good
HTN/DD (n=10)
EF (%)	0.6841	0.6224 ÷ 0.7509	Good	0.7790	0.6183 ÷ 0.7894	Good
Sm _(avg) (cm/s)	0.7838	0.7131 ÷ 0.8121	Very Good	0.8254	0.8111 ÷ 0.9211	Very Good
HTN/DM (n=10)
EF (%)	0.6549	0.6338 ÷ 0.7009	Good	0.6919	0.6759 ÷ 0.7479	Good
Sm _(avg) (cm/s)	0.7625	0.7346 ÷ 0.8434	Very Good	0.7784	0.8115 ÷ 0.9300	Very good
HTN/DD/DM (n=10)
EF (%)	0.6841	0.6324 ÷ 0.7509	Good	0.6790	0.6183 ÷ 0.7194	Good
Sm _(avg) (cm/s)	0.7945	0.7234 ÷ 0.8222	Very Good	0.8854	0.8005 ÷ 0.9401	Very good

The ICC is a measure of the reliability of measurements or ratings. The table reports two coefficients with their respective 95% CI. Single measures: this is an index for the reliability of the ratings for one, typical, single rater and average measures which is an index for the reliability of different raters averaged together. (<0.20 Poor; 0.21-0.40 Fair; 0.41-0.60 Moderate; 0.61-0.80 Good; 0.81-1.00 Very good).

ISSN: 1471-2261