Fig. 1: Forest plot showing the individual equivalence coefficients for twenty-three parameters.

The blue box depicts the average individual equivalence coefficient. The error bars depict the upper and lower limits of the 95% confidence interval. The red line indicates the pre-determined non-inferiority criterion of 0.25 for the upper bound of the 95% confidence interval. Abbreviations and N (number of studies): a’ lateral (N = 408); a’ septal (N = 430); e’ lateral (N = 458); e’ septal (N = 490); E/e’ (N = 388); DecT, deceleration time of early diastolic MV transmitral flow (N = 446); IVSd, interventricular septal diameter end diastolic (N = 547); LAESV MOD biplane, left atrial end systolic volume biplane calculation based on method of discs (N = 507); LVEDV MOD biplane, left ventricular end diastolic volume biplane calculation based on method of discs (N = 534); LVEF MOD biplane, left ventricular ejection fraction biplane based on method of discs (N = 531); LVESV MOD biplane left ventricular end systolic volume biplane calculation based on method of discs (N = 535); LVIDd, left ventricular internal diameter at end diastole (N = 550); LVIDs left ventricular internal diameter at end systole (N = 537); LVPWd, left ventricular posterior wall thickness measured end diastolic (N = 547); LVSV MOD biplane, left ventricular stroke volume biplane calculation based on method of discs (N = 533); MV-A, late diastolic transmitral flow (N = 433); MV-Adur, duration of late diastolic transmitral flow (N = 326); MV-E, early diastolic transmitral flow (N = 508); RA area a4c, right atrial area at end systole in A4C (N = 480); RVIDd, right ventricular end diastolic internal diameter (N = 372); s’ lateral (N = 445); s’ septal (N = 459); TR Vmax, tricuspid regurgitation maximum velocity (N = 149).