Table 1

Patients´ characteristics at baseline
Phaco trabeculectomy Phaco canaloplasty P value
n of eyes (%) 20 (51.3) 19 (48.7)
Eye (%)
  Right 9 (45.0) 9 (47.4) 1.000 a
  Left 11 (55.0) 10 (52.6)
Age (years)
  Mean ± SD 73.6 ± 7.5 72.9 ± 5.7 .743 b
  Range 59–89 64–81
Gender (%)
  Male 6 (30.0) 9 (47.4) .333 a
  Female 14 (70.0) 10 (52.6)
BCVA (logMAR)
  Mean ± SD 0.71 ± 0.87 0.48 ± 0.39 .835 c
  Range 0.00–3.00 0.10–1.70
IOP (mmHg)
  Mean ± SD 30.0 ± 5.3 28.3 ± 4.1 .272 b
  Range 22–39 23–37
n (%) of patients with topical medications 16 (80.0) 17 (89.5)
n (%) of patients with systemic medications 4 (20.0) 2 (10.5)
n of topical anti-glaucomatous medications
  Mean ± SD 2.5 ± 1.2 2.8 ± 1.1 .309 c
  Range 0–4 0–4
Type of glaucoma (%)
  Primary open-angle 10 (50.0) 9 (47.4) 1.000 a
  Narrow angles 2 (20.0) 1 (11.1)
  Pseudoexfoliative 10 (50.0) 10 (52.6)
Previous ocular surgery (%)
  None 10 (50.0) 8 (42.1) -
  Laser trabeculoplasty 6 (30.0) 6 (31.6)
  Cyclodestructive 2 (10.0) 4 (21.1)
  Laser peripheral iridotomy* 2 (10.0) 1 (5.3)

Absolute values (percentage), unless stated otherwise. SD standard deviation.

IOP intraocular pressure, BCVA best-corrected visual acuity, logMAR log of the minimum angle of resolution, n sample size.

aχ2-test (Fisher´s exact test).

b Student´s t-test for independent samples with normal distribution (Shapiro-Wilk test was used to assess normality of distributions).

c Mann–Whitney U-test without normal distribution.

* Laser peripheral iridotomy was performed in eyes with slightly narrow angles.

Matlach et al.

Matlach et al. BMC Ophthalmology 2013 13:1   doi:10.1186/1471-2415-13-1

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