An open source software for fast grid-based data-mining in spatial epidemiology (FGBASE)

Table 1 Candidate clusters of T1D cases discovered by the FGBASE using cases from the Isis-Diab cohort

Cluster candidate	Cluster candidate 1	Cluster candidate 2	Cluster candidate 3	Cluster candidate 4
Location	Next to Le Havre	Next to Dunkerque	Next to Toulouse	Next to Nantes
LAEA -ETRS89 grid coordinates of the rectangular zone:	[(3610,2979), (3610,2981), (3608,2981), (3608,2979)]	[(3774,3126), (3774,3130), (3783,3130), (3783,3126)]	[(3627,2313), (3627,2315), (3631,2315), (3631,2313)]	[(3446,2746), (3446,2750), (3453,2750), (3453,2746)]
WGS84 coordinates of rectangular zone:	[(0.15368,49.4943), (0.150047,49.5121), (0.122639,49.5097), (0.126282,49.4919)]	[(2.19376,50.9823), (2.18771,51.018), (2.31538,51.0265), (2.32132,50.9908)]	[(1.40999,43.5677), (1.40733,43.5856), (1.45649,43.5897), (1.45914,43.5718)]	[(1.59501,47.2094), (-1.60299,47.2449), (-1.51148,47.2548), (-1.5035,47.2192)]
Number of cases	8 cases	13 cases	13 cases	41 cases
Number of controls	3 controls	0 controls	4 controls	16 controls
log of the numerator of Kulldorff’s likelihood ratio:	-6240.36	-6235.35	-6238.47	-6235.09

Using the data-driven option of the FGBASE software, zones most likely to be clusters of T1D cases where discovered in the vicinity of the cities of Le Havre, Dunkerque, Toulouse and Nantes.

ISSN: 1476-072X