- Ratio expressed as % of the numbers observed in 2020 and the numbers observed in 2019 with, in brackets, the confidence interval of this ratio, calculated using the standard error of a ratio of two independent Poisson distributed count variables. P1-P5 refers to periods mentioned in Table 1. Red and green boxes show situations where the confidence interval of the ratio of observed numbers in 2020 versus 2019 do not contain 100% and are considered statistically significantly different. Bold numbers show the situations where the relative decrease in malignant specimens is larger than for benign specimens. The red and green numbers show a ratio of less than 85% or more than 115%. For numbers of cytology examinations per week, all specimens, benign and malignant diagnoses, see supplementary table 1. na = not available (less than 20 specimens per week)
