Table 2

Endothelin-1 plasma levels, visual field damage, intraocular pressure, and systemic blood pressure (mean (SD))

Cluster 1 (26 patients)Cluster 2 (30 patients)p Value
MD  =  visual field index “mean defect”; IOP  =  intraocular pressure values refer to values obtained during the diurnal tension curve; blood pressure values refer to values obtained during 24 hour blood pressure monitoring.
Endothelin-1 plasma level (pg/ml)2.90 (0.76)2.90 (0.81)0.98
MD in right eyes (dB)7.65 (6.87)7.95 (6.63)0.87
MD in left eyes (dB)8.32 (7.29)10.36 (18.65)0.60
Peak IOP in right eyes (mm Hg)21.88 (6.50)21.50 (5.12)0.81
Peak IOP in left eyes (mm Hg)22.19 (7.50)21.37 (4.35)0.61
Average IOP in right eyes (mm Hg)14.63 (2.00)14.37 (2.78)0.70
Average IOP in right eyes (mm Hg)14.61 (3.47)14.87 (2.85)0.76
Average systolic 24 hours blood pressure (mm Hg)118.71 (19.04)118.72 (18.23)0.99
Average diastolic 24 hours blood pressure (mm Hg)74.04 (9.68)74.04 (9.81)0.99
Average systolic day-time blood pressure (mm Hg)128.66 (20.29)127.95 (17.41)0.89
Average diastolic day-time blood pressure (mm Hg)81.69 (9.98)81.18 (9.27)0.85
Average systolic night-time blood pressure (mm Hg)111.59 (18.50)112.60 (20.38)0.85
Average diastolic night-time blood pressure (mm Hg)68.51 (9.49)69.28 (11.41)0.79
Nocturnal drop (%) of systolic blood pressure13.15 (5.90)12.04 (8.94)0.59
Nocturnal drop (%) of diastolic blood pressure15.99 (7.71)14.60 (10.33)0.58
Ocular perfusion pressure in right eyes50.27 (7.35)50.14 (7.47)0.95
Ocular perfusion pressure in left eyes50.29 (7.84)49.64 (7.25)0.75