MRI characteristics for “phantom” scratching in canine syringomyelia

BMC Veterinary Research

Table 2 Summary statistics for mean syrinx perpendicular dimensions (cm²) in each dorsal quadrant

Spinal segment	Mean	SD	Median	Min Max	Two sample test (p=)	SAMPLE SIZE
C2 LQ
SR	0.0248	0.0153	0.0256	0.0025/0.0450	0.121	6
NSR	0.0428	0.0194	0.0467	0.0217/0.0600	0.121	3
C2 RQ
SR	0.0119	0.0136	0.0069	0.0025/0.0313	0.032	4
NSR	0.0425	0.0152	0.0350	0.0325/0.0600	0.032	3
C3 LQ
SR	0.1020	0.0480	0.0944	0.0103/0.1789	0.001	15
NSR	0.0331	0.0290	0.0175	0.0050/0.0943	0.001	14
C3 RQ
SR	0.1021	0.0236	0.1033	0.0550/0.1369	<0.001	15
NSR	0.0274	0.0220	0.0171	0.0063/0.0743	<0.001	14
C4 LQ
SR	0.1122	0.0571	0.1060	0.0200/0.2220	<0.001	19
NSR	0.0457	0.0420	0.0233	0.0090/0.1250	<0.001	14
C4 RQ
SR	0.1172	0.0601	0.1000	0.0222/0.2400	<0.001	19
NSR	0.0447	0.0400	0.0272	0.0085/0.1233	<0.001	14
C5 LQ
SR	0.1013	0.0607	0.0957	0.0063/0.2275	<0.001	15
NSR	0.0212	0.0218	0.0125	0.0050/0.0740	<0.001	12
C5 RQ
SR	0.0993	0.0501	0.0900	0.0242/0.1925	<0.001	15
NSR	0.0225	0.0230	0.0135	0.0030/0.0780	<0.001	12
C6 LQ
SR	0.0876	0.0535	0.0930	0.0200/0.1625	0.002	8
NSR	0.0089	0.0041	0.0100	0.0038/0.0146	0.002	5
C6 RQ
SR	0.0653	0.0478	0.0500	0.0200/0.1300	0.009	8
NSR	0.0132	0.0088	0.0100	0.0050/0.0250	0.009	5
C7 LQ
SR	0.1000	0.0652	0.1000	0.0100/0.1900	n/a	5
NSR	0.0133	–	0.0133	0.0133/0.0133	n/a	1
C7 RQ
SR	0.0448	0.0249	0.0450	0.0100/0.0800	n/a	5
NSR	0.0200	–	0.0200	0.0200/0.0200	n/a	1
C8 LQ
SR	0.3450	–	0.3450	0.3450/0.3450	n/a	1
NSR						0
C8 RQ
SR	0.0600	–	0.0600	0.0600/0.0600	n/a	1
NSR						0

A figure representing the syrinx cavity area was obtained by multiplying the perpendicular dimensions of the cavity in each dorsal quadrant in each transverse MRI section. Subsequently a figure representing the dorsal syrinx cavity size for each spinal cord segment was obtained by calculating the mean of all the perpendicular dimension areas for each transverse MRI section for each segment for each dog. C – cervical (see Table 1) RQ – right dorsal quadrants LQ – left dorsal quadrants SR – scratcher, NSR – non-scratcher. C1 Not included due to sample sizes. Blank cell means that there was no syrinx at this site. Bold font - p values indicates a significant result (p < 0.05)

ISSN: 1746-6148