Table 4 Estimates from logistic regression on reporting of sleep problems among adolescents and young adults by interaction between sex and time spent on mobile phone

Male # No time spent on mobile phone®

Male # Spent 1 to 2 hour on mobile phone

0.92 (0.7 1.21)

0.63**(0.44 0.92)

Male # Spent 3 or more hour on mobile phone

1.13 (0.8 1.61)

0.77 (0.51 1.14)

Female # No time spent on mobile phone

1.54***(1.17 2.03)

1.42*(0.98 2.06)

Female # Spent 1 to 2 hour on mobile phone

2.11***(1.63 2.73)

1.66***(1.15 2.38)

Female # Spent 3 or more hour on mobile phone

2.94***(1.97 4.38)

2.36***(1.59 3.51)

Constant

0.12***(0.07 0.2)

0.16***(0.11 0.25)