Aortic elasticity after aortic coarctation relief: comparison of surgical and interventional therapy by cardiovascular magnetic resonance imaging

Table 3 Native and postcontrast T1 relaxation times (in ms)

T1 times	Surgery, N = 32	Stent, N = 18	p-value	CI (95)^a
Native T1 values
- Mid-septum	1238.0 (1172.1–1301.7)	1240.9 (828.5–1317.2)	0.94	− 32.8 – 29.9
Average native T1	1262.5 (1206.1–1426.5)	1284.4 (1213.1–1422.1)	0.85	−54.17 – 34.93
Post-contrast T1 values
- Mid-septum	393.4 (285.5–454.3)	441.1 (311.1–597.0)	0.18	− 174 – 28.3
Average post-contrast T1	390.3 (244.5–443.4)	430.5 (311.1–598.7)	0.13	− 192 – 34.5
ECV (%)	39.8 (36.2–63.1)	33.2 (25.0–41.1)	0.41	−44.0 – 43.7

Values are median with range. P values of < 0.005 were indicated as statistically significant
CI Confidence interval, ECV Extracellular volume fraction
^aConfidence intervals are based on the Hodges-Lehman method [23]

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