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Table 5 Frequency, incidence and incidence density ratio of caries affected children and teeth

From: Assessment of dental caries predictors in 6-year-old school children - results from 5-year retrospective cohort study

  Observation period (5 Years)
n(Children) 1830
Number of new caries affected cases 464
Children-years of observation 7990
IDp/100 children at risk 5.80
n(teeth) 44829
Number of new caries affected teeth 1038
Teeth-years of observation 137099.7
IDt/100 teeth at risk 0.76
  1. IDp Incidence density for person.
  2. IDt Incidence density for teeth.