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. 2017 Nov 29;11:2125–2131. doi: 10.2147/OPTH.S146901

Table 1.

Comparison on sample vs census population data

Age group, years Sample, % Census, %
50–59 49.2 51.7
60–69 35.7 31.9
70–79 10.5 13.7
80–99 4.5 2.7
All 100.0 100.0