Table 3

Cognitive test performance relative to P gingivalis IgG

TestOverall (%)P gingivalis IgG (EU) (95% CI)p Value*
Immediate verbal memory/registration (9 possible points)
    Low (0–4 points)5.7164.3 (78.3–250.3)0.24
    High (5–9 points)113.6 (100.7–126.5)
Delayed verbal memory (9 possible points)
    Low (0–3 points)6.9155.3 (87.4–223.2)0.23
    High (4–9 points)114.6 (101.6–127.7)
Serial 3 subtraction test (5 possible points)
    Low (0–4 points)22.1132.3 (114.3–150.4)0.046
    High (5 points)114.8 (100.6–129.0)
  • *p values derived from t test comparison of means of P gingivalis IgG by population characteristic.