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Table 3 Trends in myopia prevalence among high school students in Fenghua city, eastern China, during 2001 to 2015

From: The increasing prevalence of myopia and high myopia among high school students in Fenghua city, eastern China: a 15-year population-based survey

  2001 2015 APC (%) 95%CI P value
N Prevalence (%) N Prevalence (%)
Total myopia 1923 79.53 2570 87.65 0.59 0.41, 0.77 0.000
Low myopia 791 32.71 716 24.42 −1.73 −2.23, − 1.24 0.000
Moderate myopia 939 38.83 1340 45.70 0.78 0.36, 1.20 0.001
High myopia 191 7.90 487 16.61 5.48 4.40, 6.54 0.000
Very high myopia 2 0.08 27 0.92 14.59 7.33, 22,34 0.001
  1. APC annual percent change, CI, confidence interval, Annual percent change between 2001 and 2015 was calculated by the myopia prevalence