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Table 4 IVUS and manufacturer stent lengths by groups

From: Longitudinal stent elongation or shortening after deployment in the coronary arteries: which is dominant?

  Elongated stents (n = 69, 67.6%) Shortened stents (n = 16, 15.7%) Unchanged stents (n = 17, 16.7%) p value
Manufacturer stent length measurements
 Box-stated stent length, mm 19.3 ± 5.7 19.9 ± 4.7 17.7 ± 6.4 0.49
 Predicted forshortened stent length, mm 18.4 ± 4.9 19.5 ± 4.7 16.0 ± 3.8 0.1
IVUS stent length measurements
 (E-E) stent length, mm 21.2 ± 6.2 18.5 ± 4.3 18.1 ± 6.5 0.08
 (A-A) stent length, mm 20.7 ± 6.3 18.2 ± 4.4 17.2 ± 6.6 0.06
 Average IVUS stent length, mm 19.7 (16.2–24.3)* 17.4 (14.7–22.7) 17.7 (14.7–18.3) 0.01
Stent length differences (IVUS-manufacturer)
 (E-E) stent length - box-stated stent length, mm 1.9 ± 1.4* (−)1.4 ± 0.4 0.4 ± 0.3 <0.001
 (A-A) stent length - box-stated stent length, mm 1.4 ± 1.3* (−)1.8 ± 0.3 (−)0.5 ± 0.4 <0.001
 Average IVUS stent length - box-stated stent length, mm 1.3 (0.7–2.2)* (−)0.5 [(−)1.1–(−)0.4] (−)0.1 [(−)0.3–0.2] <0.001
 (E-E) stent length - predicted foreshortened stent length, mm 1.84 (1.3–2.8)* 0.65 (0.5–1.1) (−)0.2 [(−)0.5–0.3] <0.001
 (A-A) length - predicted foreshortened stent length, mm 1.3 (0.8–2.3)* (−)0.04 [(−)0.4–0.2] (−)0.4 [(−)0.8–(−)0.1] <0.001
 Average IVUS stent length - predicted foreshortened stent length, mm 1.6 (1.0–2.6)* (−)0.3 [(−)0.7–0.6] 0.3 (0.1–0.5) <0.001
  1. Data provided as mean ± SD or median (IQR)
  2. A-A area-to-area length, E-E edge-to-edge length, IVUS intravascular ultrasound
  3. *p<0.05, compared to both shortened and unchanged stents
  4. p<0.05, compared to unchanged stents