quite significantP < 0.0001
The critical SII value was 3.40, with SII range between 0–3.40, SII rose by 1 unit, the OAB decreased by 0.25 (OR = 0.75, 95% CI: 0.55–1.01, P = 0.06); when the range of SII was ≥ 3.40, the relationship between SII and OAB was quite significant (OR = 1.06, 95% CI: 1.04–1.09, P < 0.0001).