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Table 3 Prevalence of myopia among third-year students in junior high school in Haidian District, Beijing, China

From: The increasing prevalence of myopia in junior high school students in the Haidian District of Beijing, China: a 10-year population-based survey

YearNumber (Percentage, %)

2006 n (%)

2007 n (%)

2008 n (%)

2009 n (%)

2010 n (%)

2011 n (%)

2012 n (%)

2013 n (%)

2014 n (%)

2015 n (%)

Total n (%)

non-myopiaa

1611 (44.05)

1573 (43.51)

1521 (41.53)

1459 (39.46)

1528 (39.21)

1471 (38.87)

1456 (38.16)

1410 (37.23)

1386 (36.16)

1269 (34.52)

14,684 (100)

 Boys

814 (22.26)

796 (22.02)

772 (21.08)

768 (20.77)

789 (20.25)

786 (20.77)

764 (20.02)

737 (19.46)

744 (19.41)

683 (18.58)

7653 (20.45)

 Girls

797 (21.79)

777 (21.49)

749 (20.45)

691 (18.69)

739 (18.96)

685 (18.10)

692 (18.13)

673 (17.77)

642 (16.75)

586 (15.94)

7031 (18.79)

low myopia

1180 (32.27)

1151 (31.84)

1124 (30.69)

1052 (28.46)

1057 (27.12)

969 (25.61)

923 (24.19)

890 (23.50)

854 (22.28)

762 (20.73)

9962 (26.62)

 Boys

603 (16.49)

577 (15.96)

571 (15.59)

568 (15.36)

558 (14.32)

539 (14.24)

398 (10.43)

467 (12.33)

461 (12.03)

402 (10.94)

5144 (13.75)

 Girls

577 (15.78)

574 (15.88)

553 (15.10)

484 (13.09)

499 (12.80)

430 (11.36)

525 (13.76)

423 (11.17)

393 (10.25)

360 (9.79)

4818 (12.87)

moderate myopia

721 (19.72)

740 (20.47)

843 (23.02)

1002 (27.01)

1097 (28.15)

1121 (29.62)

1211 (31.73)

1259 (33.25)

1347 (35.14)

1399 (38.06)

10,740 (28.70)

 Boys

289 (7.90)

311 (8.60)

332 (9.07)

427 (11.55)

420 (10.78)

512 (13.53)

492 (12.89)

528 (13.94)

501 (13.07)

592 (16.10)

4273 (11.42)

 Girls

432 (12.81)

429 (11.87)

511 (13.95)

575 (15.55)

677 (17.37)

609 (16.09)

719 (18.84)

731 (19.30)

846 (22.07)

807 (21.95)

6467 (17.28)

high myopia

145 (3.96)

151 (4.18)

174 (4.75)

184 (4.98)

215 (5.52)

223 (5.89)

226 (5.92)

228 (6.02)

246 (6.42)

246 (6.69)

2038 (5.45)

 Boys

36 (0.98)

36 (1.00)

53 (1.45)

70 (1.89)

86 (2.21)

89 (2.35)

98 (2.57)

84 (2.22)

77 (2.01)

95 (2.58)

724 (1.93)

 Girls

109 (2.98)

115 (3.18)

121 (3.30)

114 (3.08)

129 (3.31)

134 (3.54)

128 (3.35)

144 (3.80)

169 (4.41)

151 (4.11)

1314 (3.51)

Total

3657 (100.00)

3615 (100.00)

3662 (100.00)

3697 (100.00)

3897 (100.00)

3784 (100.00)

3816 (100.00)

3787 (100.00)

3833 (100.00)

3676 (100.00)

37,424 (100)

 Boys

1742 (47.63)

1629 (45.06)

1718 (46.91)

1833 (49.58)

1853 (47.55)

1926 (50.90)

1752 (45.91)

1816 (47.95)

1783 (46.52)

1772 (48.20)

17,794 (47.55)

 Girls

1915 (52.37)

1986 (54.94)

1944 (53.09)

1864 (50.42)

2044 (52.45)

1858 (49.10)

2064 (54.09)

1971 (52.05)

2050 (53.48)

1904 (51.80)

19,630 (52.45)

  1. anon-myopia: emmetropia and hyperopia