Table 1. Demographic characteristics of PACG cases and controls.

	Cases	Controls	P
Number	500	720
Age, y (Mean ± SD)	63.77 ± 9.576	71.82 ± 7.2	0.000#
Sex, n (%)			0.000*
Male	147 (29.4)	332 (46.1)
Female	353 (70.6)	388 (53.9)
Nationality, n (%)			0.761*
Han	407(81.4)	591 (82.1)
Hui	93 (18.6)	129 (17.9)

#The p-value was tested by t-test.

*The p-value was assessed by χ2 test.