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. 2012 Jun 16;470(10):2854–2863. doi: 10.1007/s11999-012-2420-6

Table 4.

Extent of release required based on prerelease tracking grade

Prerelease tracking Number of patients Spearman’s rank correlation test
Step 1 release Step 2 release Step 3 release Total
Grade 1 5 (25%) 12 (60%) 3 (15%) 20 p = 0.0123*
ρ [rho] = 0.1746**
Grade 2 10 (7.6%) 92 (69.7%) 30 (22.7%) 132
Grade 3 2 (3.9%) 34 (65.4%) 16 (30.8%) 52
Grade 4 0 0 1 (100%) 1

* Significant correlation; **Spearman’s rank correlation coefficient less than 0.7 is of little importance.