Table 3 Asymmetry of OMAG parameters and structural thickness parameters in glaucoma and control groups.

From: Asymmetry analysis of optical coherence tomography angiography macular perfusion density measurements in preperimetric and perimetric glaucoma

 

Median (25% quartile, 75% quartile)

Pairwise comparison

Control (n = 39)

PPG (n = 27)

PG (n = 50)

Control vs PPG

PPG vs PG

Control vs PG

Macular outer vessel length density asymmetry (/mm)

0.7 (0.2–1.4)

1.0 (0.5–1.7)

2.7 (1.7–4.6)

0.580

0.051

 < 0.001

Macular inner vessel length density asymmetry (/mm)

0.7 (0.2–1.5)

0.6 (0.4–2.0)

1.5 (0.5–2.5)

0.743

0.528

0.199

Macular outer perfusion density asymmetry

0.02 (0.01–0.03)

0.02 (0.01–0.04)

0.08 (0.05–0.11)

0.582

0.009

 < 0.001

Macular inner perfusion density asymmetry

0.02 (0.01–0.04)

0.02 (0.01–0.06)

0.03 (0.01–0.06)

0.865

0.355

0.235

mGCIPL thickness asymmetry (μm)

5.0 (3.0–6.0)

5.0 (3.0–9.0)

8.5 (2.0–14.0)

0.814

0.054

0.004

Average mGCIPL thickness asymmetry (μm)

2.7 (1.7–3.7)

4.0 (1.0–6.0)

7.5 (2.5–11.0)

0.959

0.018

0.001

cpRNFL thickness asymmetry (μm)

7.0(4.0–11.8)

19.0(7.0–33.0)

20.5(11.0–33.3)

0.007

0.366

0.002

  1. All values represent median with interquartile range in parentheses.
  2. Age, gender, and spherical equivalence were adjusted in pairwise comparisons.
  3. PPG preperimetric glaucoma; PG perimetric glaucoma; mGCIPL macular ganglion cell-inner plexiform layer; cpRNFL circumpapillary retinal nerve fibre layer asymmetry.
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