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Table 3 Results of Episcan tests that allow overlap among identified statistically significant clusters.

From: A procedure to characterize geographic distributions of rare disorders in cohorts

Study Region Units of analysis Highly significant clusters, p ≤ 0.01 Significant clusters, 0.01 < p ≤ 0.05 Maximum Relative Risk Accepted contributing clusters
   Count Population range Count Population range   
RC A Set 11 183 2914, 33009 810 1496, 33463 2.22 269
  Set 22 50 9074, 32919 186 3729, 33661 1.96 126
RC B Set 11 0 n.a. 2 11775, 13697 1.50 0
  Set 22 0 n.a. 1 15599 1.44 0
  1. 1 Maximum unit population of 1,000.
  2. 2 Maximum unit population of 2,000
  3. Accepted contributing clusters have a p ≤ 0.05, RR ≥ 1.7 and birth population ≥ 1000.