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

Although no significant differences were observed in terms of DCR, PFS and OS, with milder toxicity, NG appeared to be a more valuable first-line treatment regimen than NP in anthracycline- and taxane-pretreated patients with HER2-negative advanced breast cancer.
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This is a directly correlative relationship
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