marginal significancep = 0.0535
S7 , the low NLR cutoff subgroup exhibited predictive value for AKI (OR 1.526, 95% CI 1.38–1.68, p < 0.001) without significant inter-study heterogenicity ( I 2 = 29.1%), whereas the high-cutoff group showed limited predictive utility with marginal significance (OR 1.334, 95% CI 1.00–1.79, p = 0.0535) and the heterogenicity in this subgroup remained significant ( I 2 = 93%).