Table 6 Analysis of multiplicative interaction between parental myopia and poor reading and writing habits on students’ myopia

Parental myopia and Habit 1

 Parental myopia

1.69

5.43 (3.60–8.20)

< 0.01

1.49

4.44 (2.90–6.78)

< 0.01

 Habit 1

1.33

3.76 (2.91–4.94)

< 0.01

1.27

3.58 (2.74–4.73)

< 0.01

 Parental myopia and Habit 1

-0.47

0.63 (0.41–0.96)

0.05

–0.37

0.69 (0.44–1.08)

0.10

Parental myopia and poor reading and writing habits (2)

 Parental myopia

1.47

4.38 (3.38–5.68)

< 0.01

1.26

3.53 (2.70–4.62)

< 0.01

 Habit 2

0.69

1.91 (1.60–2.30)

< 0.01

0.63

1.88 (1.56–2.27)

< 0.01

 Parental myopia and Habit 2

-0.23

0.79 (0.59–1.05)

0.11

–0.11

0.89 (0.66–1.21)

0.46