Prevalence, Risk Factors, and Causes of Visual Impairment in an Elderly Chinese Uygur Population in Southern Xinjiang

Table 1

Demographic characteristics of the participants with different visual impairment levels.

Parameters	Total (n)	Normal vision	Mild visual impairment	Moderate visual impairment	Severe visual impairment	Blindness
Age (years)	1465	56.7 ± 8.5	60.9 ± 8.6	65.4 ± 9.8	70.1 ± 10.6	67.9 ± 11.7	≤0.001
Sex (%)
Male	673	447	80	93	26	27
Female	792	543	115	94	17	23
							0.085
Education (n)
Uneducated	323	177	49	64	15	18
≤primary school	817	563	115	91	24	24
Junior middle school	256	197	24	26	3	6
High school or higher	69	53	7	6	1	2
							≤0.001
BMI (kg/m^2)	1465	25.3 ± 4.0	24.6 ± 3.6	23.8 ± 4.1	22.3 ± 3.6	22.9 ± 3.2	≤0.001
Smoking
Yes	161	116	20	17	5	3
No	1304	874	175	170	38	47
							0.623
Drinking
Yes	33	27	2	3	1	0
No	1432	963	193	184	42	50
							0.426

BMI: body mass index; kg/m²: kilogram/meter².