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Crude and adjusted mean with 95 percent confidence intervals (CIs) of three cognitive scores, comparing five levels of periodontal conditions (n = 5,942). Covariates in the adjusted models included age, sex, race/study center, education, income, cigarette smoking, alcohol use and diabetes. DL/LB: Deep lesion/low bleeding. DL/MB: Deep lesion/moderate bleeding. DL/SB: Deep lesion/severe bleeding. G: Gingivitis. H: Healthy.
