Comparison of retina specialist preferences regarding spectral-domain and swept-source optical coherence tomography angiography

Figures & data

Figure 1 OCTA segmentation layers on Zeiss SS and SD.

Notes: Two cases shown as presented in the survey. AMD case showing the SS OCTA of the choriocapillaris (top left) and corresponding SD OCTA (top right). Diabetic retinopathy case showing the SS OCTA of the retinal layer (bottom left) and corresponding SD OCTA (bottom right).
Abbreviations: AMD, age-related macular degeneration; OCTA, optical coherence tomography angiography; SD, spectral domain; SS, swept source.

Table 1 Basic demographic characteristics and baseline OCTA attitudes of the survey respondents

Characteristics	Survey responses, N (%), n=54
Years in practice, median (IQR)	3.00 (1.50–17.00)
Type of practice
Private practice	16 (33)
Academia	32 (67)
Missinga	6
OCTA purchase plan
Already own one	23 (48)
Within a year	8 (17)
Not sure	17 (35)
Missinga	6
How useful is it clinically
Definitely	3 (6)b
Sometimes	17 (35)b
Rarely	13 (27)b
Maybe in future	15 (31)b
Missinga	6
OCTA preference
SD	12 (28)
SS	8 (19)
SS if it was more affordable	23 (53)
Missinga	11

Notes:

a Missing data not included in percentage calculations.

b Because of rounding, percentages may not total 100.

Abbreviations: IQR, interquartile range; OCTA, optical coherence tomography angiography; SD, spectral domain; SS, swept source.

Table 2 OCTA preference pattern and clinical meaningfulness per various pathologies

Case questionnaire	Retinal disease,a N (%), n=186	nAMD, N (%), n=247	RPE disease,b N (%), n=184	Overall, N (%), n=617
Preference
SD	37 (20)	67 (27)	55 (30)	159 (26)
SS	148 (80)	179 (73)	127 (70)	454 (74)
Missingc	1	1	2	4
Clinically valuable
SD only	2 (1)	9 (4)	6 (3)	17 (3)d
SS only	40 (22)	55 (22)	25 (14)	120 (20)d
Both	106 (57)	161 (66)	107 (58)	374 (61)d
Neither	38 (20)	20 (8)	46 (25)	104 (17)d
Missingc	0	2	0	2

Notes:

a Retinal disease includes diabetic retinopathy and branch RVO.

b RPE disease includes CSCR, punctate inner choroidopathy, and multifocal choroiditis.

c Missing data not included in percentage calculations.

d Because of rounding, percentages may not total 100.

Abbreviations: CSCR, central serous chorioretinopathy; n, number of survey responses; nAMD, neovascular age-related macular degeneration; OCTA, optical coherence tomography angiography; RPE, retinal pigment epithelium; RVO, retinal vein occlusion; SD, spectral domain; SS, swept source.

Table 3 OCTA preference pattern before and after the survey (without learning the correct answer during the survey)

Before survey	After survey
	SD, N (%)	SS, N (%)	SS if more affordable, N (%)	Missinga	Total, N (%), n=43
SD	8 (67)	1 (8)	3 (25)	0	12 (28)
SS	0 (0)	5 (83)	1 (17)	2	8 (19)
SS if more affordable	3 (14)b	5 (23)b	14 (64)b	1	23 (53)
Missinga	0	2	3	6
Total, N (%), n=45	11 (24)	13 (29)	21 (47)

Notes:

a Missing data not included in percentage calculations.

b Because of rounding, percentages may not total 100.

Abbreviations: OCTA, optical coherence tomography angiography; SD, spectral domain; SS, swept source.

Figure S1 Screenshot of questionnaire at the beginning of the survey.

Note: Created by Aaron Y Lee and Cecilia S Lee, University of Washington.

Abbreviations: OCTA, optical coherence tomography angiography; SD, spectral domain; SS, swept source.

Figure S2 Screenshot of questionnaire following each case.

Note: Created by Aaron Y Lee and Cecilia S Lee, University of Washington.

Abbreviations: OCTA, optical coherence tomography angiography; SD, spectral domain; SS, swept source.