Table 2.

Comparison of the therapeutic effects of CSG of different dose combinations on MPP⁺-induced in vitro model.

Chinese herbal medicine	Dose level	Number of experiments	Mean ± standard deviation	Confidence interval		F	P
Cistanche deserticola	1	3	142.50 ± 9.32	137.55	147.45	18.51	<0.01
	2	3	128.17 ± 10.28	123.22	133.12
Refined Rhizoma polygonati	1	3	134.58 ± 10.41	129.63	139.53	0.20	0.69
	2	3	136.08 ± 13.96	131.13	141.03
Salvia miltiorrhiza	1	3	131.58 ± 11.70	126.63	136.53	5.07	0.04
	2	3	139.08 ± 11.70	134.13	144.03
Radix Paeoniae Rubra	1	3	134.83 ± 15.30	129.88	139.78	0.09	0.77
	2	3	135.83 ± 8.37	130.88	140.78
Tree peony bark	1	3	140.17 ± 11.06	135.22	145.12	8.42	0.01
	2	3	130.50 ± 11.45	125.55	145.45

Model R² = 0.642.