Spatial and temporal distribution of incidence of acquired equine polyneuropathy in Norway and Sweden, 1995-2012

BMC Veterinary Research

Table 2 Results from the Jacquez k nearest neighbour (kNN) analysis for space-time clustering of case farms

k^a	J(k)^b	p(J(k))^c	ΔJ(k)^d	p(ΔJ(k))^e
1	2	0.258	2	0.258
2	4	0.592	2	0.794
3	15	0.032	11	0.016
4	20	0.197	5	0.788
5	30	0.188	10	0.425
6	37	0.495	7	0.869
7	56	0.234	19	0.135
8	67	0.429	11	0.827
9	77	0.679	10	0.908
10	92	0.762	15	0.760

The overall combined (k 1-10) p-value was 0.128 using Sime’s correction (999 iterations were used to evaluate significance). The study included all farms with reported cases of acquired equine neuropathy in Norway and Sweden during 1995-2012, for which the month of occurrence of the first case was known (n = 135).
^aNearest-neighbour order.
^bNumber of space-time k nearest neighbours.
^cSignificance of J(k).
^dNumber of space-time k nearest neighbours when k was increased by 1.
^eSignificance of ΔJ(k).

ISSN: 1746-6148