Fig. 3From: Recent incidence trend of elderly patients with glioblastoma in the United States, 2000–2017Age-period-cohort parameters and functions for the incidence of glioblastoma in the elderly, including (a) longitudinal age curve, (b) period RR, (c) cohort RR, and (d) local drifts with net drift. The shaded gray regions represent the 95% confidence interval. The solid and dot horizontal lines in (d) represent net drift and the 95% confidence interval. RR, rate ratioBack to article page