Table 3.

Associations between the changes in individual (lifestyle) factors, social and cultural factors, and living conditions and changes in sleep duration between 2009 and 2012

	Univariable analysis*		Multivariable analysis
	B (95% CI)	p value	B (95% CI)	p value
Individual characteristics
Age	- 0.15 (- 0.17 – - 0.13)	< 0.001	- 0.15 (- 0.17 – - 0.13)	< 0.001
Sex1	0.06 (0.01–0.11)	0.01	0.06 (0.02–0.11)	0.01
Individual lifestyle factors
Δ Outdoor play	0.00 (- 0.04 – 0.04)	0.84	–	–
Δ Organized sports	0.02 (- 0.06 – 0.09)	0.66	–	–
Δ SSB consumption	0.01 (- 0.01 – 0.02)	0.42	–	–
Δ Using a screen after dinner2	- 0.10 (- 0.18 – - 0.01)	0.02	- 0.08 (- 0.16 – 0.01)	0.07
Δ Television use	- 0.02 (- 0.05 – 0.02)	0.41	–	–
Δ Computer/game console use	- 0.08 (- 0.12 – - 0.05)	< 0.001	- 0.08 (- 0.12 – - 0.04)	< 0.001
Social and cultural factors
Δ Rules concerning amount of television2	0.07 (0.00 – 0.15)	0.05	0.07 (0.00 – 0.15)	0.06
Δ Rules concerning amount of computer/game console2	0.00 (- 0.07 – 0.07)	0.93	–	–
Living conditions
Medium parental educational level3	0.01 (- 0.04 – 0.06)	0.62	0.03 (- 0.02 – 0.08)	0.29
Low parental educational level3	- 0.21 (- 0.33 – - 0.09)	< 0.001	- 0.16 (- 0.28 – - 0.04)	0.01
Δ Presence of a screen in the bedroom2	- 0.04 (- 0.08 – 0.01)	0.14	–	–
Δ Household size	0.03 (- 0.03 – 0.08)	0.37	–	–

*Univariable analyses were adjusted for age, sex and parental educational level

¹Reference = Male

²Adoption between 2009 and 2012 compared to neither in 2009 nor 2012

³Reference = High parental educational level