Table 2. Comparison of H/M ratios between PD and PPS patients in early-onset and delayed-onset group

	Early-onset group			Late-onset group			All patients
	PD	PPS	P value	PD	PPS	P value	PD	PPS	P value
Early H/M ratio	2.03±0.42	2.01±0.29	0.882	1.71±0.32	2.14±0.34	<0.001	1.78±0.36	2.10±0.33	<0.001
Delayed H/M ratio	2.05±0.56	2.22±0.52	0.468	1.58±0.42	2.25±0.57	<0.001	1.68±0.49	2.24±0.55	<0.001