Table 4 Association between characteristics of online courses and mental health problems of children

Problems of online courses

 No

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 Difficulty in understanding the content of online courses

2.82 (1.32, 6.05)

0.008

1.64 (0.64, 4.18)

0.299

3.17 (1.94, 5.18)

 < 0.001

1.93 (1.07, 3.49)

0.028

 Device or internet connection problems

1.20 (0.15, 9.66)

0.866

1.14 (0.09, 14.24)

0.919

0.46 (0.06, 3.54)

0.454

0.33 (0.04, 2.99)

0.323

Main form of online courses

 Live courses

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 Video-recorded courses

2.30 (1.09, 4.85)

0.029

1.60 (0.59, 4.29)

0.355

1.60 (0.98, 2.61)

0.062

1.43 (0.78, 2.64)

0.249

 E-learning material without video

0.45 (0.06, 3.52)

0.448

0.15 (0.01, 1.76)

0.130

1.01 (0.42, 2.38)

0.991

0.73 (0.25, 2.13)

0.557

Online courses time per day, hour

  <  = 4(lower than or equal to median)

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  > 4(more than median)

0.96 (0.44, 2.10)

0.923

0.81 (0.28, 2.36)

0.697

1.46 (0.91, 2.34)

0.120

1.66 (0.91, 3.02)

0.098