. Author manuscript; available in PMC: 2022 Jul 24.

Published in final edited form as: Child Obes. 2019 Feb 27;15(4):237–243. doi: 10.1089/chi.2018.0247

Table 3. Overall and by sex association between sleep duration and the risk of obesity: crude and adjusted models.

Sleep duration	Incidence per 1000 person-years (95%CI)	Crude model RR (95%CI)	Adjusted model^* RR (95%CI)
Overall sample
Recommended	0.77 (0.62; 0.94)	1 (Reference)	1 (Reference)
Not recommended	1.01 (0.75; 1.37)	1.31 (0.93; 1.86)	1.00 (0.71; 1.41)
By sex: boys
Recommended	0.89 (0.68; 1.17)	1 (Reference)	1 (Reference)
Not recommended	1.60 (1.14; 2.25)	1.79 (1.19; 2.70)	1.43 (0.95; 2.14)
By sex: girls
Recommended	0.65 (0.48; 0.88)	1 (Reference)	1 (Reference)
Not recommended	0.43 (0.22; 0.82)	0.66 (0.32; 1.34)	0.45 (0.21; 0.96)

Adjusted by age, sex, socioeconomic status, household location, maternal education, number of meals the previous day, physical activity during last week, and maternal BMI. Sex was excluded from the model in stratified analyses.