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Table 1 The age group and gender of participants examined compared to the age and gender distribution of the inhabitants of the municipalities of Botucatu and Sao Paulo.

From: Prevalence and causes of visual impairment in a Brazilian population: The Botucatu Eye Study

Age Group
(years)
Examined
n = 2485 (%)
Botucatu#
n = 108 306 (%)
Sao Paulo#
n = 10 435 546 (%)
1–9 213 (8.6) 17 629 (16.3) 1 708 230 (16.4)
10–19 372 (14.9) 20 459 (18.9) 1 878 255 (17.9)
20–29 355 (14.3) 18 695 (17.2) 1 969 018 (18.9)
30–39 317 (12.8) 16 124 (14.9) 1 699 367 (16.3)
40–49 457 (18.4) 13 966 (12.9) 1 352 029 (13.0)
50–59 348 (14.0) 9 292 (8.6) 855 640 (8.2)
60–69 216 (8.7) 6 442 (5.9) 540 687 (5.2)
70 and over 207 (8.3) 5 699 (5.3) 432 320 (4.1)
Gender   n = 90 677* n = 8 727 317*
Male 1056 (42.5) 43 851 (48.4) 4 106 513 (47.1)
Female 1429 (57.5) 46 826 (51.6) 4 620 804 (52.9)
  1. # Data obtained from the Instituto Brasileiro de Geografia e Estatsitica, 2001. * The municipal data on gender was only available for inhabitants aged 10 years and over.