Changes in peripapillary retinal nerve fiber layer thickness in patients with primary open-angle glaucoma after deep sclerectomy

Table 1 Demographic and clinical features of the studied patients

Parameters	Surgery group	Control group	P value1
No. of patients	35
Age (yr)	62.2 ± 2.5
Gender
Male	18 (51%)
Female	17 (49%)
Diabetes mellitus	8
Hypertension	25
Cup/Disc ratio	0.76 ± 2.4	0.57 ± 2.1	F = 3.52
			P = 0.0121
IOP diurnal range2	12.17 ± 2.21	8.26 ± 3.31	F = 4.64
			P = 0.0151
Preoperative IOP (mmHg)	23.4 ± 6.1	18.5 ± 2.3	F = 3.54
			P = 0.0151
Preoperative medication	3.1 ± 0.5	1.7 ± 0.4	F = 2.56
			P = 0.0211
Preoperative VF MD (dB)	-9.2 ± 5.3	-4.5 ± 4.1	F = 4.21
			P = 0.0171
Preoperative VF PSD (dB)	5.7 ± 3.1	4.8 ± 2.9	F = 4.56
			P = 0.25
Preoperative VA (logMAR)	0.73 ± 0.4	0.86 ± 0.2	F = 3.61
			P = 0.36

¹Significant at P < 0.05;

²Difference between the lowest and highest recorded intraocular pressure (IOP). One-way ANOVA test (F) and χ² test were used. VF: Visual field; MD: Mean deviation; VA: Visual acuity; PSD: Pattern standard deviation; logMAR: Logarithm of minimal angle of resolution.