Table 1 Baseline characteristics of the study groups.

From: Minimally invasive bleb surgery versus minimally invasive glaucoma surgery: a 12-month retrospective study

Variable

Preserflo

iStent

MD (95% CI)

p

n (%)/Mean ± SD

Median (Q1;Q3)

n (%) / Mean ± SD

Median (Q1;Q3)

N

43 (100.0)

–

78 (100.0)

–

–

–

Sex, female

30 (69.8)

–

53 (67.9)

–

–

0.9993

Age, years

68.98 ± 10.09

70.00 (61.25; 75.00)

72.48 ± 8.70

75.00 (67.00; 79.00)

− 3.50 (− 7.00; 0.00)1

0.0492

POAG

34 (79.1)

–

63 (80.8)

–

–

 > 0.9993

PXG

9 (20.9)

–

15 (19.2)

–

Medication number

2.24 ± 1.32

2.00 (2.00; 3.00)

1.79 ± 1.03

2.00 (1.00; 2.00)

0.00 (0.00; 1.00)

0.027

BCVA

0.59 ± 0.33

0.60 (0.35; 1.00)

0.56 ± 0.56

0.50 (0.34; 0.68)

0.10 (− 0.03; 0.20)

0.281

IOP, mmHg

25.14 ± 6.53

23.00 (21.00; 28.00)

21.94 ± 2.95

21.00 (20.00; 23.00)

2.00 (1.00; 4.00)

0.002

  1. BCVA, best corrected visual acuity in Snellen decimal score; IOP, intraocular pressure.
  2. Note: SD, standard deviation; Q1, lower quartile; Q3, upper quartile; MD—mean1 or median difference (Preserflo vs. iStent). Data presented as n (%) for categorical variables and means ± SD and medians (Q1; Q3) for numerical variables. Between-group comparisons were conducted using Student’s t-tests for independent groups2 or Mann–Whitney U-tests (for numerical variables) and Pearson’s chi-square tests3 (for categorical variables).
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