Table 1

Cohort of children with COVID-19: changes of myopia prevalence, spherical equivalent and axial length over 8 months

BaselineAt 8-month follow-upDifferences between baseline and 8-month follow-up
Myopia prevalenceSER (D) Mean (SD)AL (mm) Mean (SD)Myopia prevalenceSER (D) Mean (SD)AL (mm) Mean (SD)Changes in myopia prevalenceP valueChanges in SER (D) Mean (SD)P valueChanges in AL (mm) Mean (SD)P value
Age group (years)
 6 (n=224)8.48%0.62 (0.83)22.70 (0.73)25.45%0.08 (1.03)23.01 (0.74)16.97%<0.001**−0.54 (0.54)<0.001* 0.30 (0.39)<0.001*
 7 (n=236)18.03%0.33 (1.13)22.95 (0.80)36.80%−0.22 (1.39)23.25 (0.87)18.77%<0.001* −0.53 (0.51)<0.001* 0.31 (0.20)<0.001*
 8 (n=249)29.51%0.04 (1.36)23.27 (0.85)42.62%−0.41 (1.47)23.52 (0.92)13.11%<0.001* −0.44 (0.47)<0.001* 0.26 (0.41)<0.001*
 Total (n=709)18.97%0.32 (1.16)22.98 (0.83)35.25%−0.19 (1.33)23.27 (0.87)16.28%<0.001* −0.50 (0.51)<0.001* 0.29 (0.35)<0.001*
  • Χ2 was used to compare categorical variables between groups; a paired t-test was used to compare continuous variable between groups

  • *Significance was set at 0.05

  • AL, axial length; D, diopter; SER, spherical equivalent refraction.