Table 3. 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).

		47÷63 y.o.	64÷78 y.o.	p-value
No.	Parameter	Mean±SD	Mean±SD	Levene’s test	Age Group (≤63 &>63 y.o.)	Subject Group (CG,GODA, POAG, PACG)	Interaction SubjectGroup & Age
1	τ (ECG, BPL) [s]	0.28±0.03	0.31±0.07	0.02	-	-	-
2	τ (ECG, maxCIP1) [s]	0.16±0.04	0.18±0.05	0.41	<0.001	0.20	0.41
3	τ (ECG, maxCIP2) [s]	0.57±0.12	0.64±0.14	0.46	0.003	0.39	0.62
4	τ (BPL, maxCIP1) [s]	0.12±0.05	0.13±0.07	0.03	-	-	-
5	τ (BPL, maxCIP2) [s]	0.29±0.12	0.33±0.12	0.16	0.06	0.05	0.68
6	pre CT [s]	0.12±0.03	0.13±0.04	0.34	0.001	0.08	0.31
7	CT [s]	0.25±0.09	0.30±0.11	0.22	0.06	0.05	0.91
8	pre RCT [%]	16±5	16±4	0.04	-	-	-
9	RCT [%]	33±11	34±12	0.07	0.96	0.13	0.68
10	HR [beat/min]	79±10	71±11	0.14	<0.001	0.40	0.01

Statistically significant differences satisfying the criterion of equality of variances are marked in bold font.

CG – control group; GODA – glaucoma suspects with glaucomatous optic disc appearance; POAG – primary open angle glaucoma; PACG – primary angle closure glaucoma; τ(ECG, BPL) – time delay between R wave peak of ECG and systolic BPL peak; τ(ECG, maxODP₁) – time delay between R wave peak of ECG and the first major ODP maximum; τ(ECG, maxODP₂) – time delay between R wave peak of ECG and the second major ODP maximum; τ(BPL, maxODP₁) – time delay between systolic BPL peak and the first major ODP maximum; τ(BPL, maxODP₂) – time delay between systolic BPL peak and the second major ODP maximum; preCT – 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; preRCT = preCT/HCT*100% – preliminary relative crest time; RCT = CT/HCT*100% – relative crest time and HR – the heart rate.