Table 3. Comparison of markers of strain between healthy controls and *patients with “no/mild” symptoms, and ^†patients with “significant” symptoms.

Strain parameter	Controls (n=13)	“No/mild” (n=21)	P Value*	“Significant” (n=21)	P value†
Peak circumferential strain (%)
Base	−23.9±3.2	−19.9±4.6	0.010	−19.5±6.8	0.016
Mid	−25.9±3.8	−20.5±5.4	0.003	−22.1±5.2	0.028
Apex	−27.2±3.0	−19.8±5.9	0.001	−20.8±6.7	0.001
Peak circumferential strain rate (S-1)
Systolic	−0.039±0.004	−0.033±0.011	0.021	−0.033±0.007	0.004
Diastolic	0.023±0.009	0.027±0.015	0.417	0.031±0.017	0.130
Peak longitudinal strain (PLS)
Peak LS (%)	−20.406±2.041	−17.967±3.921	0.029	−16.337±4.937	0.002
PLS rate
Systolic (%/s)	−98.1446±16.2573	−106.301±43.276	0.523	−83.352±24.802	0.067
Diastolic (%/s)	96.9319±20.6486	86.476±29.805	0.282	72.855±25.631	0.008

*, P value for comparison between controls and those with “no/mild” symptoms; ^†, P value for comparison between controls and those with “significant” symptoms.