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Table 3 Change in the prevalence of myopia for each year in school children in 2019鈥�2023

From: Survey on pattern of myopia in school children in Hangzhou after the COVID-19 pandemic: a school-based vision screening study

Age, y

n

Change in Prevalence (%), myopia

听听

2019- 2020

2020鈥�2021

2021鈥�2022

2022鈥�2023

听听

螖 PR

P value*

螖 PR

P value*

螖 PR

P value*

螖 PR

P value*

6

13,752

0.59

0.001

-0.12

0.001

-0.36

0.001

-0.25

0.001

7

13,556

0.32

0.001

0.02

0.394

-0.32

0.001

-0.04

0.076

8

13,192

0.13

0.001

0.00

0.876

-0.25

0.001

0.02

0.346

9

14,172

0.22

0.001

0.06

0.001

-0.24

0.001

0.02

0.275

10鈥�11

12,547

0.08

0.002

0.01

0.335

-0.15

0.001

0.02

0.217

12鈥�13

11,866

0.06

0.004

0.06

0.001

-0.19

0.001

0.06

0.001

  1. Abbreviation: PR Prevalence rate. 螖 PR, change in prevalence rate
  2. *Comparing the prevalence rate in myopia within each age group using the two-proportions z test
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