Briefly review the meaning of prevalence-incidence bias.
a) Prevalence-incidence bias refers to the distortion of prevalence estimates caused by variations in disease duration or survival time among different groups.
b) Prevalence-incidence bias refers to the overestimation of incidence rates due to variations in disease duration or survival time among different groups.
c) Prevalence-incidence bias refers to the underestimation of prevalence rates due to variations in disease duration or survival time among different groups.
d) Prevalence-incidence bias refers to the underestimation of incidence rates due to variations in disease duration or survival time among different groups.