The results of two way ANOVA (with the given signal parameter being the dependent variable and age and the subject group being the two independent variables).

<p>Statistically significant differences satisfying the criterion of equality of variances are marked in bold font.</p><p>CG – control group; GODA – glaucoma suspects with glaucomatous optic disc appearance; POAG – primary open angle glaucoma; PACG – primary angle closure glaucoma; <i>τ</i>(ECG, BPL) – time delay between R wave peak of ECG and systolic BPL peak; <i>τ</i>(ECG, maxODP₁) – time delay between R wave peak of ECG and the first major ODP maximum; <i>τ</i>(ECG, maxODP₂) – time delay between R wave peak of ECG and the second major ODP maximum; <i>τ</i>(BPL, maxODP₁) – time delay between systolic BPL peak and the first major ODP maximum; <i>τ</i>(BPL, maxODP₂) – time delay between systolic BPL peak and the second major ODP maximum; <i>pre</i>CT – preliminary crest time - time taken from minimum to the first major maximum of ODP shape; CT – crest time - time taken from minimum to maximum of ODP shape; HCT – time duration of heart cycle, taken from R peak to the next R peak of ECG shape; <i>pre</i>RCT = <i>pre</i>CT/HCT*100% – preliminary relative crest time; RCT = CT/HCT*100% – relative crest time and HR – the heart rate.