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Acute Aortic Disease.. - Index of

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Natural History <strong>of</strong> Thoracic <strong>Aortic</strong> Aneurysms 181<br />

Table 1 Multivariable Estimates <strong>of</strong> Aneurysm Growth Rates—Annual Growth Rates According to Intial Aneurysm Size a<br />

Patient 8.0 cm 5.0 cm<br />

category (n = 84) (n = 220) (n = 106) (n = 42) (n = 19) (n = 7) (sample mean)<br />

All (n = 478) 0.12 cm/yr 0.16 cm/yr 0.19 cm/yr 0.21 cm/yr 0.24 cm/yr 0.40 cm/yr 0.16 cm/yr<br />

(0.09–0.14) (0.13–0.18) (0.15–0.24) (0.10–0.32) (−0.06–0.55) (−0.18–1.02) (0.15–0.18)<br />

Dissection status<br />

Chronic dissection 0.12 cm/yr 0.20 cm/yr 0.25 cm/yr 0.83 cm/yr 0.08 cm/yr N/A 0.21 cm/yr<br />

(n = 123) (0.07–0.17) (0.14–0.27) (0.10–0.43) (0.57–1.10) (−0.16–0.34) (0.17–0.25)<br />

No dissection 0.11 cm/yr 0.14 cm/yr 0.18 cm/yr 0.15 cm/yr 0.71 cm/yr 0.39 cm/yr 0.15 cm/yr<br />

(n = 355) (0.08 –0.15) (0.11–0.17) (0.14–0.23) (0.04–0.27) (−0.04–1.55) (−0.13–0.94) (0.13–0.17)<br />

Location <strong>of</strong> aneurysm<br />

Ascending or 0.12 cm/yr 0.14 cm/yr 0.18 cm/yr 0.52 cm/yr 0.18 cm/yr N/A 0.15 cm/yr<br />

Arch (n = 358) (0.08–0.14) (0.11–0.17) (0.12–0.22) (0.33–0.73) (−0.19–0.57) (0.13–0.17)<br />

Descending or 0.10 cm/yr 0.20 cm/yr 0.24 cm/yr 0.13 cm/yr 0.98 cm/yr 0.41 cm/yr 0.21 cm/yr<br />

TA (n = 120) (0.00–0.21) (0.13–0.27) (0.14–0.34) (−0.02–0.28) (0.24–1.78) (−0.32–1.20) (0.16–0.26)<br />

a 95% Confidence intervals in parentheses.

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