Table 6 Threshold effect analysis of SII on stroke using a linear regression model.

From: Association between the systemic immunity-inflammation index and stroke: a population-based study from NHANES (2015–2020)

 

Adjusted OR (95% CI), p value

SII

 

Inflection point

740.00

SII < 740.00

1.0011 (1.0006, 1.0016), < 0.0001

SII ≥ 740.00

0.9999 (0.9996, 1.0002), 0.5785

Log likelihood ratio

< 0.001

Men

 

Inflection point

772.20

SII < 772.2

1.0010 (1.0004, 1.0017), 0.0026

SII ≥ 772.2

0.9992 (0.9985, 1.0000), 0.0382

Log likelihood ratio

< 0.001

Women

 

Inflection point

3551.18

SII < 3551.18

1.0006 (1.0003, 1.0009), 0.0002

SII ≥ 3551.18

0.9996 (0.9986, 1.0006), 0.4299

Log likelihood ratio

0.038

  1. Age, gender, race, education, smoking status, hypertension, diabetes and coronary heart disease were adjusted. 95% CI, 95% Confidence Interval; OR, Odds Ratio; SII, systemic immune-inflammation index.
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