Consequences of the natural course of articular osteochondrosis in pigs for the suitability of computed tomography as a screening tool

Table 2 Summary of the number of times that defects developed and resolved radiographically, per piglet

Piglet number	Number of times scanned	Number of defects present at 1^stinterval; time of development unknown	Number of defects that developed from the 2^nd-8^thinterval	Number of times that defects were characterised as persisting	Number of defects that resolved	Sum of defects present at 1^stinterval and defects that developed	Proportion of defects that resolved
1	2	12	4	6	4	16	25%
2	3	9	8	17	2	17	12%
3	4	17	32	40	25	49	51%
4	4	25	22	60	20	47	43%
5	5	13	28	39	18	41	44%
6	5	17	26	43	27	43	63%
7	6	9	21	41	16	30	53%
8	6	16	31	52	28	47	60%
9	7	18	13	35	23	31	74%
10	7	20	28	84	27	48	56%
11*	7	10	33	79	20	43	47%
12	8	6	57	92	26	63	41%
13	8	15	27	95	23	42	55%
14	8	10	43	101	33	53	62%
15	8	15	36	116	28	51	55%
16	8	21	54	100	58	75	77%
17	8	14	47	88	43	61	70%
18	8	6	32	34	24	38	63%
Sum	112	253	542	1122	445	795
Mean		14	30	62	25	44
Range		6-25	4-57	6-116	2-58	16-75	12-77%

*Piglet 11 constituted a drop-out from histological validation at the 8^th interval.

ISSN: 1746-6148