Table 2.

Nonlinear parameter values in different cases for oscillatory potential of ERG signal.

Parameters	Controls	CSNB I	CSNB II	Typical RP	Early onset RP	Late stage RP	P value
HE	0.4551 ± 0.033	0.1120 ± 0.0112	0.1909 ± 0.0241	0.2805 ± 0.0306	0.3548 ± 0.016	0.8168 ± 0.0212	0.002
ApEn	1.8526 ± 0.005	1.4491 ± 0.0041	1.1947 ± 0.0203	0.95608 ± 0.052	0.7522 ± 0.004	0.6405 ± 0.031	0.034
HFD	1.8501 ± 0.0301	1.5448 ± 0.0165	1.4383 ± 0.026	1.0098 ± 0.003	1.3142 ± 0.0046	1.2696 ± 0.011	0.106
LLE	0.7090 ± 0.0015	0.7577 ± 0.0009	0.7134 ± 0.002	0.7043 ± 0.0052	0.741 ± 0.0064	0.732 ± 0.0041	0.079