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Table 1 Clustering of cases with pediatric inflammatory bowel disease in time and place in Finland

From: Clustering of pediatric onset inflammatory bowel disease in Finland: a nationwide register-based study

 

2 months

4 months

6 months

12 months

 

UC

CD

UC

CD

UC

CD

UC

CD

250 m

0.007*

0.171

0.015*

0.082

0.044*

0.156

0.159

0.272

500 m

0.007*

0.222

0.004*

0.142

0.004*

0.171

0.007*

0.171

1000 m

0.096

0.171

0.096

0.021*

0.096

0.122

0.112

0.127

5000 m

0.071

0.727

0.096

0.515

0.179

0.764

0.134

0.555

  1. Analyses were performed with Knox test using the coordinates of the addresses at the time of the diagnosis and the time intervals to the diagnosis dates. Corrected p-values from Knox test for pediatric ulcerative colitis (UC) and Crohn’s disease (CD) are shown
  2. The p-values were calculated using Poisson approximation and they were corrected for multiple testing using the Benjamini–Hochberg method for ulcerative colitis and Crohn’s disease separately
  3. *Statistically significant values (p < 0.05) were underlined and marked with an asterisk