NUCB2 and renal cell carcinoma: The meta-analysis results of nesfatin-1 showed no association with early-stage (OR = 0.09, 95% CI = −0.12–0.29, p = 0.41), late-stage (OR = 0.36, 95% CI = 0.07–1.89, p = 0.23) and low-grade (OR = 1.75, 95% CI = 0.37–8.27, p = 0.48) RCC.