Table 4 Multiple logistic regression analysis of influencing factors of myopia in students.

From: Prevalence and risk factors of myopia among children and adolescents in Hangzhou

Influencing factors

Wald χ2 value

P

Adjusted

OR (95% CI)

Regularly adjust height of desks/chairs according to students’ height

1.282

0.258

1.109 (0.927–1.325)

Location of inter-class activities was outside

0.069

0.793

0.979 (0.837–1.146)

Homework time ≥ 2 h per day in the past week

5.632

0.018

1.199 (1.032–1.392)*

Parents restrict children watching electronics

0.247

0.619

1.040 (0.891–1.215)

Distance between chest and the edge of table was more than one fist when reading/writing

0.013

0.911

0.989 (0.814–1.202)

Distance between the eyes and book was more than one foot (33 cm) when reading/writing

5.886

0.015

0.772 (0.627–0.952)*

Distance between the finger and tip was more than 3 cm when reading or writing

0.078

0.780

1.028 (0.846–1.250)

Teacher points out incorrect reading/writing posture

1.165

0.281

1.081 (0.938–1.245)

Average daily TV viewing time ≥ 2 h

4.656

0.031

1.323 (1.026–1.706)*

Average computer time ≥ 2 h per day

0.164

0.686

0.928 (0.647–1.332)

Lying down to read books or electronic screens

0.092

0.761

1.037 (0.819–1.314)

Reading books or electronic screens while walking or on the bus

1.156

0.282

0.835 (0.602–1.160)

Use table and roof lamps simultaneously when reading/writing at night

3.983

0.046

1.157 (1.003–1.334)*

Using a computer more than 66 cm from the screen

0.049

0.824

1.022 (0.841–1.242)

Duration of using eyes at a short distance ≥ 1 h

1.729

0.189

1.112 (0.949–1.302)

Outdoor activity time ≥ 1 h per day in the past one week

0.301

0.583

0.961 (0.833–1.108)

One of the parents was myopia

23.469

<0.001

1.687 (1.365–2.085)*

Both parents were myopia

112.428

<0.001

2.999 (2.448–3.674)*

  1. *P<0.05; OR: odds ratio; CI: confidence interval.
  2. Adjusted for age, gender and area.