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Table 4 Sample size calculation for LV longitudinal, circumferential and radial strain to detect 5, 8 and 10% relative change with 90% power and α error of 0.05

From: Cardiovascular magnetic resonance feature tracking in small animals – a preliminary study on reproducibility and sample size calculation

Parameter Mean difference ± SD Sample size (n)
5% 8% 10%
EllLAX (%) −0.98 ± 7.96 53 21 13
EccSAX (%) −3.46 ± 6.84 39 15 10
ErrSAX (%) 3.48 ± 10.06 85 33 21
  1. Abbreviations as in Table 2