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Table 2 The contribution of time (in terms of years) and diseases to the changes of RDGs by a generalized linear model

From: Epidemiological research on rare diseases using large-scale online search queries and reported case data

Variable

Coefficient

z

P>|z|

C(year) = 2016

-0.0244

-0.083

0.934

 C(year) = 2017

-0.0577

-0.196

0.845

 C(year) = 2018

0.0256

0.087

0.931

 C(year) = 2019

-0.0161

-0.054

0.957

 C(disease)[group 0]1

-0.821

-5.427

0.014

 C(disease)[group 1]1

0.014

0.095

0.629

 C(disease)[group 2]1

0.878

5.803

0.009

Intercept (b)

1.000

3.298

0.001

  1. 1 We divided all rare diseases into three groups according to their RDGs in 2016 and reported the average values of each group
  2. Abbreviations: RDG, ranking difference group