Journal of Veterinary Medicine

Research Article

Disparities in Spatial Prevalence of Feline Retroviruses due to Data Aggregation: A Case of the Modifiable Areal Unit Problem

Table 3

(a) Disease clusters as identified by the spatial scan test for FIV infections among cats in the US and Canada. (b) Disease clusters as identified by the spatial scan test for FeLV infections among cats in the US and Canada.

(a)


Cluster	Coordinates^a	Radius^b	Obs^c	Pop^d	Exp^e	Obs/exp	value

State
1	45.894, −73.425	0.00	118	1270	72.56	1.63	<0.01
County
1	41.615, −73.201	191.69	118	1191	69.26	1.70	<0.01
2	53.329, −114.075	0.00	33	462	13.46	2.45	<0.01
3	41.621, −83.653	641.51	345	9648	279.73	1.23	<0.01
4	28.515, −81.324	715.81	84	2545	52.83	1.59	<0.01
5	40.666, −105.461	1163.84	86	2336	52.41	1.64	<0.01
Postal code
1	53.572, −114.046	0.00	25	25	0.70	35.54	<0.01
2	45.578, −73.800	147.14	127	1322	72.45	1.75	<0.01
3	41.650, −83.673	638.28	345	9625	274.98	1.25	<0.01
4	27.817, −82.6777	864.23	101	3085	65.73	1.54	<0.01
5	40.595, −105.129	1123.52	84	2260	49.19	1.71	<0.01
6	40.105, −74.353	109.25	22	645	8.34	2.64	<0.01

Longitude and latitude coordinates of the center of cluster; ^bradius in kilometers;^cobserved number of ELISA positive cats; ^dtotal number of cats in the cluster; ^eexpected number of ELISA positive cats under Poisson assumption.

(b)


Cluster	Coordinates^a	Radius^b	Obs^c	Pop^d	Exp^e	Obs/exp	value

State
1	48.045, −54.689	1437.00	164	2827	93.48	1.75	<0.01
2	45.228, −93.998	637.96	78	1918	47.37	1.65	<0.01
3	34.341, −80.767	999.14	272	10089	209.11	1.30	<0.01
County
1	48.785, −55.986	1381.90	162	2789	90.83	1.78	<0.01
2	47.109, −94.917	660.90	81	1697	43.05	1.87	<0.01
3	34.841, −79.480	932.22	275	9791	209.66	1.31	<0.01
Postal code
1	48.949, −55.634	1403.07	150	2337	75.66	1.98	<0.01
2	46.948, −94.824	545.70	64	1169	31.03	2.06	<0.01
3	34.767, −79.452	936.10	274	9680	206.15	1.30	<0.01