Table 4 Odds ratio (OR) and 95 % confidence interval (CI) for obesity according to sleep duration among children aged 6–18 years in urban Guangzhou, China

Age, gender adjusted

1

1.271(1.267–1.275)

1.471(1.462–1.479)

Multivariate adjusted^a

1

1.328(1.324–1.332)

1.581(1.572–1.590)

Genders

 Boys

  Age adjusted

1

1.207(1.201–1.214)

0.655(0.641–0.669)

  Multivariate adjusted^a

1

1.235(1.229–1.242)

0.700 (0.685–0.716)

 Girls

  Age adjusted

1

1.313(1.307–1.318)

1.605(1.594–1.615)

  Multivariate adjusted^a

1

1.391(1.385–1.397)

1.725(1.714–1.736)

Age/gender groups

 Boys

  6–12 years

   Age adjusted

1

1.108(1.102–1.115)

0.624(0.570–0.683)

   Multivariate adjusted^a

1

1.121(1.114–1.127)

0.603(0.551–0.660)

  13–18 years

   Age adjusted

1

2.126(2.099–2.153)

1.227(1.196–1.258)

   Multivariate adjusted^a

1

2.220(2.192–2.249)

1.331(1.297–1.365)

 Girls

  6–12 years

   Age adjusted

1

1.310(1.304–1.316)

1.685(1.639–1.678)

   Multivariate adjusted^a

1

1.319(1.313–1.325)

1.748(1.728–1.768)

  13–18 years

   Age adjusted

1

1.907(1.882–1.923)

2.400(2.366–2.434)

   Multivariate adjusted^a

1

2.247(2.217–2.277)

2.868(2.826–2.909)