marginally non-significantP = 0.026
A fixed-effects model was used for the meta-analysis due to no observed heterogeneity (I2 = 0.0%, P = 0.433).The results showed that a one standard deviation (SD) increase in SII was marginally non-significant in relation to diabetic retinopathy (OR = 1.001; 95% CI: 1.000-1.003; P = 0.026).