Table 1

 Characteristics of the study population (mean (SD))

NTG (n = 56)POAG (n = 41)Controls (n = 33)p Value
*One way analysis ANOVA. †χ2 test.
Peak IOP  =  highest IOP recorded; test IOP  =  IOP measured on day of research.
Age (years)65.8 (10.3)65.3 (8.9)61.2 (11.2)0.11*
Male:female (ratio)36:6456:4444:560.14†
Right:left eyes (ratio)52:4846:5456:440.70†
Refraction (D)+0.41 (2.01)+0.45 (1.73)+0.57 (2.35)0.96*
Peak IOP (mm Hg) (range)16.32 (2.64) (10–22)29.76 (5.39) (23–50)14.75 (3.03) (6–20)<0.001*
Test IOP (mm Hg) (range)17.11 (2.91) (10–23)24.54 (6.68) (9–38)14.75 (3.03) (6–20)<0.001*
Visual field MD (dB) (range)−10.39 (6.47) (−27.5 to −0.7)−9.42 (4.86) (−21.2 to −2.6)−0.78 (1.32) (−3.8 to 1.8)<0.001*