Table 6 Summary of the eligible studies on PNI in predicting survival, treatment response, and diagnosis in patients with ovarian cancer

Miao et al. [87], 2016; Zhang et al. [88], 2017; Feng et al. [47], 2018; Komura et al. [91], 2019; Yoshikawa et al. [89], 2020; Xing et al. [90], 2022

OCP: in FIGO III stage underwent CRS followed by platinum-based CT; underwent surgery

EOCP: receiving platinum-based CT, with advanced stage;

HGSOCP: with primary staging underwent DS;

OCCCP: with stage I–II (FIGO 2014) undergoing primary surgery

Predicting survival: OS, PFS, DSS

Karakaş et al. [92], 2022; Miao et al. [87], 2016

OCP: with early-stage underwent surgery; EOCP: receiving platinum-based CT

Predicting treatment response: efficacy of CT

Xing et al. [90], 2022

OCP: underwent surgery

Predicting diagnosis: 1-year recurrence