. Author manuscript; available in PMC: 2019 Oct 1.

Published in final edited form as: Am J Ophthalmol. 2018 Jul 24;194:120–125. doi: 10.1016/j.ajo.2018.07.012

Table 3.

Descriptive and statistical analyses of the horizontal diameter, vertical diameter, and ring area of the hyperautofluorescent rings observed in retinitis pigmentosa patients during visits 1 and 2, and the yearly progression rate.

	Visit 1	P-value^a	Visit 2	P-value^a	Progression rate per year	P-value^a
Horizontal diameter (µm)
SW-AF	3135 ± 1722	< 0.001	2856 ± 1581	< 0.001	− 168 ± 204	0.591
NIR-AF	2952 ± 1708	< 0.001	2675 ± 1532	< 0.001	− 151 ± 156	0.591
Vertical diameter (µm)
SW-AF	2454 ± 1399	< 0.001	2221 ± 1299	0.040	− 131 ± 159	0.877
NIR-AF	2326 ± 1429	< 0.001	2127 ± 1247	0.040	− 135 ± 190	0.877
Ring area (mm²)
SW-AF	7.6 ± 8.6	0.001	6.3 ± 7.1	0.011	− 0.7 ± 1.1	0.694
NIR-AF	6.9 ± 8.0	0.001	5.7 ± 6.3	0.011	− 0.7 ± 1.0	0.694

Data are summarized as mean ± standard deviation where appropriate. SW-AF = short-wave autofluorescence; NIR-AF = near-infrared autofluorescence.

Calculated using a paired Student’s t-test to test for a difference between these values.