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. Author manuscript; available in PMC: 2015 Oct 8.

Published in final edited form as: Br J Ophthalmol. 2014 May 15;98(10):1368–1373. doi: 10.1136/bjophthalmol-2013-304547

Table 2.

Incidence of flow index reduction in the healthy control (HC) and multiple sclerosis subgroups

Groups (n eyes)	ONH flow index (%)			Parafoveal flow index (%)
Groups (n eyes)	Within normal (>5%)	Borderline (1–5%)	Abnormal (<1%)	Within normal (>5%)	Borderline (1–5%)	Abnormal (<1%)
HC (n=21)	20 (95)	0	1 (5)	21 (100)	0	0
MS total (n=52)	36 (69)	2 (4)	14 (27)	48 (92)	2 (4)	2 (4)
MS −ON (n=38)	29 (76)	1 (3)	8 (21)	34 (90)	2 (5)	2 (5)
MS + ON (n=14)	7 (50)^*	1 (7)	6 (43)^*	14 (100)	0	0

The cutoff points of 1st and 5th percentiles were set at 2.33 and 1.65 SDs below the mean, respectively, according to normal distribution.

^*

Significantly different from the HC group at the p<0.05 level using Fisher’s exact test.

MS, multiple sclerosis; ONH, optic nerve head.