Exploring optical coherence tomography parameters in eyes with myopic tilted disc

Table 5 Relationship between the myopic tilted disc parameters and retinal nerve fiber layer peak position and peak thickness

Variables	Optic disc morphology vs. peripapillary RNFL peak position
	Superior RNFL peak angle (°)		Inferior RNFL peak angle (°)		Superior-inferior RNFL peak angle (°)
	Coefficient (95% CI)	P value	Coefficient (95% CI)	P value	Coefficient (95% CI)	P value
Nasal group
Optic disc torsion angle (°)^a	0.04 (− 0.16, 0.24)	0.69	0.03 (− 0.15, 0.20)	0.78	0.07 (− 0.26, 0.39)	0.69
OCT horizontal tilt angle (°)^b	0.07 (− 0.56, 0.71)	0.82	0.12 (− 0.28, 0.51)	0.56	0.19 (− 0.68, 1.06)	0.67
Ovality index^c	− 8.45 (− 48.60, 31.70)	0.68	− 13.13 (− 37.42, 11.16)	0.29	− 21.57 (− 64.50, 21.36)	0.33
Temporal group
Optic disc torsion angle (°)^a	0.09 (− 0.09, 0.27)	0.32	0.11 (− 0.06, 0.28)	0.19	0.20 (− 0.07, 0.47)	0.14
OCT horizontal tilt angle (°)^b	− 0.34 (− 0.81, 0.12)	0.15	0.10 (− 0.27, 0.47)	0.58	− 0.24 (− 0.96, 0.48)	0.51
Ovality index^c	− 43.73 (− 73.09, − 14.37)	< 0.01	− 9.06 (− 32.09, 13.97)	0.44	− 52.79 (− 93.20, − 12.38)	0.01

Variables	Optic disc morphology vs. peripapillary RNFL peak thickness
	Superior RNFL peak thickness (μm)		Inferior RNFL peak thickness (μm)		Superior-inferior RNFL peaks thickness asymmetry (μm)
	Coefficient (95% CI)	P value	Coefficient (95% CI)	P value	Coefficient (95% CI)	P value
Nasal group
Optic disc torsion angle (°)^a	− 0.09 (− 0.39, 0.21)	0.56	− 0.28 (− 0.73, 0.16)	0.21	0.19 (− 0.28, 0.67)	0.43
OCT horizontal tilt angle (°)^b	− 0.09 (− 0.71, 0.54)	0.79	− 0.268 (− 1.31, 0.78)	0.62	0.18 (− 0.53, 0.89)	0.61
Ovality index^c	− 25.37 (− 67.93, 17.19)	0.24	− 55.14 (− 112.57, 2.29)	0.06	29.77 (− 18.14, 77.69)	0.22
Temporal group
Optic disc torsion angle (°)^a	0.14 (− 0.07, 0.35)	0.19	− 0.09 (− 0.36, 0.18)	0.50	0.28 (0.05, 0.51)	0.02
OCT horizontal tilt angle (°)^b	− 0.70 (− 1.43, 0.04)	0.06	− 0.35 (− 1.46, 0.76)	0.54	− 0.44 (− 1.08, 0.20)	0.18
Ovality index^c	− 5.56 (− 46.12, 35.00)	0.79	6.96 (− 48.07, 61.99)	0.80	− 3.92 (− 45.80, 37.96)	0.85

RNFL = retinal nerve fiber layer; CI = confidence interval
Generalized estimation equation adjusted for age, axial length and the other myopic tilted disc parameters (i.e., additionally adjusted for ^aOCT horizontal tilt angle and ovality index, ^boptic disc torsion angle and ovality index, and ^coptic disc torsion angle and OCT horizontal tilt angle)
P values in bold indicate statistical significance

ISSN: 2326-0254