A space–time analysis of Mycoplasma bovis: bulk tank milk antibody screening results from all Danish dairy herds in 2013–2014

Table 2 Statistically significant spatial clusters of high- and low-risk Mycoplasma bovis test-positive herds in Denmark, by sampling round

Sampling round	Population^a	Radius (km)	O^b (E^c)	RR^d	LR^e	P ^f
1	334	28.89	41 (17)	2.75	14.33	<0.010
	400	87.05	4 (20)	0.17	11.44	0.035
	356	85.93	3 (18)	0.15	11.13	0.047
3	43	8.73	10 (1)	8.15	12.81	0.011
3	380	67.36	0 (11)	0	12.72	0.011

Results relating to the space scan-statistics for 15 % of the population at risk in each round are presented
^aNumber of herds in each cluster
^bObserved number of test-positive herds in each cluster
^cExpected number of test-positive herds in each cluster
^dRelative risk
^eLikelihood ratio
^f P value for the likelihood ratio test

ISSN: 1751-0147