Table 1

Comparison of demographic, ocular characteristics and the major parameters of beta parapapillary atrophy between primary angle closure suspect and non-primary angle closure suspect

ParameterPACS (N=215)NPACS (N=259)P value without adjustmentP value with adjustment
Demographic data
Age (IR), years62.00 (58.00, 67.00)59.00 (55.00, 65.00)<0.001*NA
Gender (male/female)47/16876/1830.064†NA
Ocular data
BCVA (IR)1.00 (0.80–1.00)1.00 (0.80–1.00)0.385*NA
IOP (IR), mm Hg16.00 (15.00–18.00)16.00 (15.00–18.00)0.599*NA
SE (IR), dioptre1.00 (0.25–1.63)0.25 (-0.5–0.75)<0.001*NA
Axial length (mean±SD), mm22.53±0.7323.09±0.76<0.001NA
VCDR (IR)0.36 (0.31–0.44)0.33 (0.29–0.39)<0.001*NA
Disc area (mean±SD), mm22.57±0.492.53±0.490.369‡NA
Rim disc area ratio (IR)0.84 (0.79–0.88)0.88 (0.83–0.91)<0.001*NA
Mean cup depth (IR), mm0.11 (0.07–0.15)0.10 (0.06–0.14)0.029*NA
Maximum cup depth (IR), mm0.29 (0.21–0.41)0.25 (0.17–0.34)<0.001*NA
Beta parapapillary atrophy parameters
Prevalence of β-PPA, %48.8044.400.335†0.341§
Area of β-PPA (IR), mm21.34 (1.12–1.70)1.26 (0.91–1.51)0.016*0.005§
Angular extent of β-PPA (IR), °154 (129–194.5)139 (103–187)0.019*0.110§
Maximum radial length of β-PPA (IR), mm0.35 (0.26–0.49)0.33 (0.25–0.43)0.138*0.657§
  • Values with statistical significance are shown in boldface.

  • *Mann-Whitney U test.

  • †χ2 test.

  • ‡independent samples t-test.

  • §P value with adjustment for age and axial length.

  • BCVA, best-corrected visual acuity; IOP, intraocular pressure; IR, interquartile range; NA, not available; NPACS, non-PACS; PACS, primary angle closure suspect; SE, spherical equivalence; VCDR, vertical cup-to-disc ratio; β-PPA, beta parapapillary atrophy .