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Forest plots of dementia risk in TNF inhibitor-treated patients with RA with different lengths of study periods, compared to those without TNF inhibitor treatment. (A) Dementia risk over five years of study period. (B) Dementia risk over 10 years of study period. (C) Dementia risk over 15 years of study period. (D) Dementia risk over 20 years of study period. Note: Multivariate-adjusted Cox proportional hazards regression was used in the analysis.
