Table 1. Demographics and clinical characteristics of participants.

Variables	PLC (N = 12)	Non-PLC (N = 12)	Healthy control (N = 12)	Statistics	P value
Age	57.42 ± 5.71	56.59 ± 6.17	57.16 ± 6.24	0.060	0.942
Gender (male/female)	6/6	6/6	6/6	0.000	0.000
Time of the first onset of PLC (months)	1.42 ± 0.51	N/A	N/A
PLC Scale	18 ± 4	N/A	N/A

Note: unless otherwise indicated, data are means ± standard deviations. PLC, pathological laughing and crying; N/A = not applicable.

The P value for gender distribution in the three groups was obtained by a Chi-square test.

The P value for age difference between the three groups was obtained by one-way analysis of variance. *P < 0.05.