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Table 5 ANOVA tables for the effect of anatomical model in planning for truncus cases. Response variable is case length of time

From: 3D printing for congenital heart disease: a single site’s initial three-yearexperience

Case length of time (anatomical model vs Traditional Planning): Truncus
Source D.F. Adj. S.S. Adj. M.S. F-Value P-Value
3DP 1 11,267 11,267 1.47 0.271
Error 6 45,959 7660  
Total 7 57,226   
Planning N Mean (minutes) St.Dev 95 C.I.
SoC 6 321.7 95.9 (234.2, 409.1)
3DP 2 235.00 1.41 (83.57, 386.43)
  1. Case length of time’s Cohen’s d effect size was very large (1.278) suggesting a practical difference between SoC and 3DP case length of time for Truncus patient cases. Similar to the DORV patients, this very large effect size strongly suggests the poor p-value may be related to the study population size, not the variance or mean difference