Table 6.

Comparison of visual impairment (visual acuity 6/24– 6/60) prevalence age 50 and older, Tibet prefectures versus Shunyi and Zhongshan regions

Prefecture	Age adjusted		Age and sex adjusted
	% (95% CI)		% (95% CI)
	Men	Women
Lokha	39.6 (38.6 to 40.6)	36.9 (36.1 to 37.8)	38.1 (37.5 to 38.8)
Nakchu	76.9 (71.0 to 83.0)	67.1 (61.0 to 73.0)	72.8 (70.0 to 76.1)
Lingzhr	27.5 (21.6 to 33.4)	42.1 (39.4 to 44.8)	42.1 (38.3 to 45.9)
Total	49.9 (47.0 to 52.8)	47.5 (44.2 to 50.8)	48.5 (46.1 to 50.9)
Shunyi5	16.0	20.0	18.2
Zhongshan4	NA	NA	25.5

NA  =  data not available.