Question: Is this describing a (1) directly correlative relationship, (2) conditionally causative relationship, (3) causative relationship, or (0) no relationship.

The findings of this study show that the optimal cut-off value for the PNI for prognosis differs among the TNM stages and that the preoperative PNI  is a favorable prognostic factor for stage I HCC.
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This is a conditionally causative relationship
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