PPP1R1B and neoplasm: Low cytoplasmic DARPP‐32 expression remained significantly associated with progression‐free survival in multivariate Cox regression (P = .006, HR = 0.546, 95% CI = 0.355‐0.840), when Figo stage, residual disease, tumour grade, tumour histology and median patient age were included (all with individual Kaplan‐Meier statistics of P = .001 or below).