Table 1. Comparison between registered and unregistered blindness groups.

Parameters	R	UR	P
Age(a)	79.43±9.85	83.45±7.25	<0.05 (t-test)
Sex
Male	97	50
Female	88	36	>0.05 (Chi-test)
Education			<0.05 (Chi-test)
1	24	17
2	36	28
3	61	20
4	41	12
5	23	9
Hospital visits (times)			<0.05 (Chi-test)
≥4	107	33
<4	78	53

Education 1: Illiteracy; 2: Primary school education; 3: Junior middle school education; 4: High school education; 5: University school and above education.