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Table 2 Characteristics of patients with IOP ≥15 or <15 mmHg

From: Characteristics of patients with primary open angle glaucoma and normal tension glaucoma at a university hospital: a cross-sectional retrospective study

Clinical characteristics

All (N = 138)

IOP ≥15 mmHg (N = 69)

IOP <15 mmHg (N = 69)

P value (≥15 vs. <15 mmHg)

Age (years)

60.5 ± 11.9

59.9 ± 11.8

61.1 ± 12.1

0.60

Sex (male:female)

72:66

39:30

33:36

0.39

POAG:NTG

46:92

32:37

14:55

<0.01*

VA (LogMAR)

−0.08 (−0.08 to 0.00)a

−0.08 (−0.08 to 0.00)a

−0.08 (−0.08 to 0.05)a

0.12

Refractive error (D)b

−4.46 ± 3.64 (N = 124)

−4.23 ± 3.47 (N = 65)

−4.72 ± 3.82 (N = 59)

0.61

IOP (mmHg)

14.30 ± 3.44

17.12 ± 2.34

11.49 ± 1.54

–

MD (dB)

−10.82 ± 7.96

−8.91 ± 7.29

−12.73 ± 8.19

<0.01*

Baseline MD (dB)

−9.23 ± 7.59

−7.31 ± 7.04

−11.15 ± 7.68

<0.01*

MD slope (dB/year)

−0.77 ± 0.98

−0.70 ± 0.95

−0.85 ± 1.02

0.31

Observation period (month)

28.4 ± 14.0

32.8 ± 16.0

23.9 ± 9.9

<0.01*

  1. Mean ± standard deviation
  2. VA visual acuity, IOP intraocular pressure, MD mean deviation, PSD pattern standard deviation, POAG primary open-angle glaucoma, NTG normal-tension glaucoma, D diopter
  3. * Significance at P < 0.05
  4. aMedian (interquartile range)
  5. bData from eyes without refractive surgery