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Table 4 Weighted association between SII and periodontitis

From: Association between the systemic immune inflammation index and periodontitis: a cross-sectional study

Age stratification

SII (109/L)

P value

 < 978 (OR, 95% CI)

 ≥ 978 (OR, 95% CI)

Overall

 Model 1

Reference

1.444 (1.108, 1.881)

0.005

 Model 2

Reference

1.374 (1.067, 1.769)

0.011

 Model 3

Reference

1.345 (1.038, 1.743)

0.019

30–50 years old

 Model 1

Reference

1.301 (0.849, 1.993)

0.215

 Model 2

Reference

1.266 (0.768, 2.086)

0.337

 Model 3

Reference

1.213 (0.722, 2.039)

0.445

 ≥ 50 years old

 Model 1

Reference

1.485 (1.072, 2.058)

0.015

 Model 2

Reference

1.406 (1.037, 1.905)

0.023

 Model 3

Reference

1.409 (1.037, 1.915)

0.022

  1. CI: confidence interval; OR: odds ratio; SII: systemic immune inflammatory index