Table 2. Summary statistics for optic nerve DTI (mean* with 95% CI).

	Axial Diffusivity			Radial diffusivity
	Unaffected eye**	Affected eyeΨ	Inter-ocular difference	Unaffected eye**	Affected eyeΨ	Inter-ocular difference
	1.80	1.54	-0.27	0.93	0.88	-0.05
Baseline	(1.72 to 1.85)	(1.44 to 1.61)	(-0.35 to -0.19)	(-.84 to 0.97)	(0.82 to 0.93)	(0.09 to 0.02)
	p = 0.90	p < 0.001		p = 0.73	p = 0.10
	1.81	1.61	-0.20	0.93	0.91	-0.02
1 month	(1.75 to 1.86)	(1.54 to 1.67)	(-0.27 to -0.13)	(0.87 to 0.97)	(0.84 to 0.96)	(-0.07 to 0.02)
	p = 0.91	p < 0.001		p = 0.82	p = 0.25
	1.84	1.74	-0.10	0.94	0.99	0.05
3 months	(1.75 to 1.88)	(1.63 to 1.80)	(-0.16 to – 0.04)	(0.86 to 0.97)	(0.92 to 1.05)	(0.03 to 0.11)
	p = 0.59	p = 0.003		p = 0.96	p = 0.023
	1.79	1.77	-0.02	0.92	1.0	0.08
6 months	(1.71 to 1.82)	(1.71 to 1.81)	(-0.06 to 0.05)	(0.85 to 0.96)	(0.94 to 1.05)	(0.04 to 0.14)
	p = 0.61	p = 0.74		p = 0.62	p = 0.003
	1.76	1.82	0.06	0.93	1.07	0.16
12 months	(1.68 to 1.80)	(1.75 to 1.86)	(0.02 to 0.12)	(0.84 to 0.95)	(1.01 to 1.11)	(0.11 to 0.22)
	p = 0.26	p = 0.013		p = 0.44	p < 0.001

* Measurement units are x10^{- 3} mm²s^-1.

^** Significance values from unpaired Student’s t-tests between unaffected nerve and control nerves

Ψ Significance values paired Student’s t-tests between affected and unaffected nerves.